/* ==========================================================================
   3D INDUSTRIAL MACHINERY SHOWROOM — INDUSTRIAL DESIGN SYSTEM
   Matches screenshot UI/UX pixel-for-pixel with dark high-tech aesthetics
   ========================================================================== */

:root {
  /* Dark Slate / Cyberpunk Navy Base Palette */
  --bg-app: #060a14;
  --bg-panel: rgba(10, 17, 34, 0.92);
  --bg-panel-solid: #0d1527;
  --bg-card: rgba(18, 29, 54, 0.75);
  --bg-card-hover: rgba(28, 44, 80, 0.85);
  --bg-card-active: rgba(225, 29, 72, 0.12);

  /* Primary Accent: Electric Crimson / Red */
  --accent-red: #e11d48;
  --accent-red-hover: #f43f5e;
  --accent-red-glow: rgba(225, 29, 72, 0.45);
  --accent-red-dark: #991b1b;

  /* Secondary Accent: Electric Cyan / Sky Blue */
  --accent-cyan: #00f0ff;
  --accent-blue: #0284c7;
  --accent-blue-glow: rgba(0, 240, 255, 0.35);

  /* Borders & Dividers */
  --border-subtle: #1e293b;
  --border-muted: rgba(255, 255, 255, 0.08);
  --border-active-red: #e11d48;
  --border-active-cyan: #00f0ff;

  /* Typography */
  --text-white: #f8fafc;
  --text-gray: #94a3b8;
  --text-muted: #64748b;
  --text-red: #ff334b;
  --text-cyan: #38bdf8;

  /* Fonts - Exclusively IranSansX */
  --font-sans: 'IranSansX', sans-serif;
  --font-tech: 'IranSansX', sans-serif;
  --font-mono: 'IranSansX', sans-serif;
  --font-farsi: 'IranSansX', sans-serif;

  /* Sizing & Layout */
  --header-height: 60px;
  --left-panel-width: 250px;
  --right-panel-width: 370px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-pill: 6px;
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-app);
  color: var(--text-white);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  line-height: 1.4;
  user-select: none;
}

body.rtl-mode {
  font-family: var(--font-farsi);
  direction: rtl;
}

/* Base Ambient Radial Backdrop Glow */
.ambient-bg-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background: 
    radial-gradient(circle at 50% 40%, rgba(0, 240, 255, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 85% 15%, rgba(225, 29, 72, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 15% 85%, rgba(2, 132, 199, 0.1) 0%, transparent 50%);
  opacity: 0.9;
}

/* Main App Layout Container */
.app-container {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: relative;
  z-index: 2;
}

/* Custom Scrollbar for sidebars */
::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}
::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-red);
}

.ambient-grid-lines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: 0;
}

.glass-panel {
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  z-index: 10;
}

/* ==========================================================================
   HEADER NAVIGATION (Matches Screenshot)
   ========================================================================== */
.app-header {
  position: relative;
  width: 100%;
  height: var(--header-height);
  background: rgba(7, 12, 23, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.45)) drop-shadow(0 0 12px rgba(225, 29, 72, 0.3));
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.brand-logo:hover .brand-logo-icon {
  transform: scale(1.08);
  filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.75)) drop-shadow(0 0 16px rgba(225, 29, 72, 0.5));
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-white);
}

.brand-subtitle {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-red);
}

/* Header Right Machine Title (Clean Text Style) */
.header-machine-badge {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--text-white);
  background: transparent;
  border: none;
  padding: 4px 0;
  border-radius: 0;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  transition: color var(--transition-fast), opacity var(--transition-fast);
  font-family: inherit;
  text-transform: uppercase;
}

.header-machine-badge:hover {
  background: transparent;
  border-color: transparent;
  color: var(--accent-red);
}

.header-machine-badge:active {
  opacity: 0.75;
}

.header-right-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-left: auto;
  gap: 8px;
}

.mobile-header-btn {
  display: none; /* Shown on mobile */
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-white);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 10.5px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: inherit;
}

.mobile-header-btn:hover {
  background: rgba(225, 29, 72, 0.15);
  border-color: var(--accent-red);
}

.mobile-header-btn i,
.mobile-header-btn svg {
  width: 14px;
  height: 14px;
  color: var(--accent-red);
}

/* Right Header Tools */
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-icon-btn {
  background: transparent;
  border: none;
  color: var(--text-gray);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.header-icon-btn:hover {
  color: var(--text-white);
  background: rgba(255, 255, 255, 0.06);
}

.header-icon-btn i {
  width: 17px;
  height: 17px;
}

.notification-btn {
  position: relative;
}

.notif-badge {
  position: absolute;
  top: 2px;
  right: 0px;
  background: var(--accent-red);
  color: #fff;
  font-size: 8px;
  font-weight: 700;
  padding: 1px 3px;
  border-radius: 6px;
  line-height: 1;
  box-shadow: 0 0 6px var(--accent-red);
}

.header-lang-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-white);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.header-lang-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.header-lang-btn i {
  width: 14px;
  height: 14px;
}

.header-lang-btn .chevron-icon {
  width: 12px;
  height: 12px;
  color: var(--text-gray);
}

.btn-request-quote {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-red);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 0 12px var(--accent-red-glow);
}

.btn-request-quote:hover {
  background: var(--accent-red-hover);
  box-shadow: 0 0 20px rgba(225, 29, 72, 0.7);
  transform: translateY(-1px);
}

.btn-request-quote i {
  width: 14px;
  height: 14px;
}

/* ==========================================================================
   3-PANEL STUDIO WORKSPACE LAYOUT
   ========================================================================== */
.studio-workspace-container {
  position: relative;
  width: 100%;
  height: calc(100vh - var(--header-height));
  display: flex;
  overflow: hidden;
  z-index: 10;
}

/* ==========================================================================
   LEFT SIDEBAR: MACHINES LIST
   ========================================================================== */
.left-machines-sidebar {
  width: var(--left-panel-width);
  height: 100%;
  border-right: 1px solid var(--border-subtle);
  border-top: none;
  border-bottom: none;
  border-left: none;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  background: #090e18;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  overflow: hidden;
  position: relative;
}

.left-machines-sidebar.collapsed {
  width: 0;
  min-width: 0;
  border-right: none;
  opacity: 0;
  pointer-events: none;
}

.machines-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-header-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-header-icon {
  width: 15px;
  height: 15px;
  color: var(--accent-red);
}

.sidebar-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-white);
}

.sidebar-close-btn {
  display: none; /* Shown on mobile */
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-gray);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.sidebar-close-btn:hover {
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: #ffffff;
  box-shadow: 0 0 12px var(--accent-red-glow);
}

.sidebar-close-btn i,
.sidebar-close-btn svg {
  width: 15px;
  height: 15px;
}

.panel-collapse-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-gray);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.panel-collapse-btn:hover {
  color: #ffffff;
  background: rgba(225, 29, 72, 0.15);
  border-color: rgba(225, 29, 72, 0.3);
}

.panel-collapse-btn i {
  width: 15px;
  height: 15px;
}

/* Sidebar Search Box */
.sidebar-search-container {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(15, 23, 42, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition-fast);
}

.search-input-icon {
  width: 14px;
  height: 14px;
  color: var(--text-muted);
  flex-shrink: 0;
}

#machine-search-input {
  flex: 1;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 11.5px;
  font-family: inherit;
  outline: none;
}

#machine-search-input::placeholder {
  color: var(--text-muted);
}

.clear-search-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
}

.clear-search-btn:hover {
  color: var(--text-white);
}

.clear-search-btn i {
  width: 13px;
  height: 13px;
}

.machines-scroll-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Machine Card Item in Left List */
.machine-list-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: left;
  position: relative;
}

.machine-list-card:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.08);
}

/* ACTIVE STATE FOR 04 COOLING TOWER */
.machine-list-card.active {
  background: rgba(225, 29, 72, 0.12);
  border: 1px solid var(--accent-red);
  box-shadow: inset 0 0 10px rgba(225, 29, 72, 0.2), 0 0 8px rgba(225, 29, 72, 0.2);
}

.machine-card-thumb {
  width: 52px;
  height: 44px;
  background: rgba(15, 23, 42, 0.9);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
}

.machine-card-thumb img,
.machine-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.machine-list-card:hover .machine-thumb-img {
  transform: scale(1.08);
}

.machine-list-card.active .machine-thumb-img {
  transform: scale(1.05);
  filter: brightness(1.1);
}

.machine-card-thumb svg {
  width: 100%;
  height: 100%;
}

.machine-card-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.card-num-title {
  display: flex;
  align-items: baseline;
  gap: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-gray);
  font-family: var(--font-tech);
}

.machine-list-card.active .card-num {
  color: var(--text-red);
  text-shadow: 0 0 8px rgba(225, 29, 72, 0.4);
}

.card-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-white);
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-code {
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.machine-list-card.active .card-code {
  color: var(--text-gray);
}

/* ==========================================================================
   CENTER PANEL: 3D VIEWPORT & 4 MODE CARDS
   ========================================================================== */
.center-viewport-panel {
  flex: 1;
  height: 100%;
  position: relative;
  display: flex;
  flex-direction: column;
  background: radial-gradient(circle at 50% 45%, #111a2e 0%, #060a14 85%);
  overflow: hidden;
}

/* Top Left Identity & Top Right Tools */
.viewport-top-overlay {
  position: absolute;
  top: 16px;
  left: 20px;
  right: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  z-index: 20;
  pointer-events: none;
}

.viewport-machine-identity {
  display: flex;
  flex-direction: column;
  pointer-events: auto;
}

.identity-main-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.accent-number {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-red);
  font-family: var(--font-tech);
  line-height: 1;
  text-shadow: 0 0 10px rgba(225, 29, 72, 0.4);
}

.machine-heading {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--text-white);
  line-height: 1;
}

.machine-model-code {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-gray);
  letter-spacing: 0.5px;
  margin-top: 4px;
}

.viewport-top-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: auto;
}

.vtool-btn {
  width: 32px;
  height: 32px;
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  backdrop-filter: blur(8px);
}

.vtool-btn:hover {
  color: var(--text-white);
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(30, 41, 59, 0.8);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.vtool-btn i {
  width: 15px;
  height: 15px;
}

/* 3D WebGL Canvas Container */
.three-canvas-viewport {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  z-index: 5;
}

/* ==========================================================================
   BOTTOM 4 MODE CARDS DOCK (Enlarged, Formal CAD Engineering System)
   ========================================================================== */
.viewport-bottom-dock {
  position: absolute;
  bottom: 14px;
  left: 20px;
  right: 20px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  z-index: 20;
}

.dock-action-btn {
  display: none;
}

.mode-card-btn {
  background: rgba(12, 19, 35, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 12px 14px 10px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  text-align: center;
  outline: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.mode-card-btn:hover {
  background: rgba(20, 32, 58, 0.96);
  border-color: rgba(255, 255, 255, 0.28);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.65);
}

/* ACTIVE CARD STATE */
.mode-card-btn.active {
  background: rgba(25, 38, 66, 0.98);
  border: 1.5px solid var(--accent-red);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6), inset 0 0 0 1px rgba(225, 29, 72, 0.35);
}

.mode-card-btn.active .card-thumb-container {
  border-color: rgba(225, 29, 72, 0.5);
  box-shadow: 0 0 14px rgba(225, 29, 72, 0.25);
}

.card-thumb-container {
  width: 100%;
  height: 98px;
  background: #070d18;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.09);
  position: relative;
}

.card-thumb-canvas {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
}

.mode-svg-icon {
  width: 96%;
  height: 96%;
  max-height: 90px;
  object-fit: contain;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.65));
  transition: transform var(--transition-fast);
}

.mode-card-btn:hover .mode-svg-icon {
  transform: scale(1.04);
}

.mode-card-btn.active .mode-svg-icon {
  transform: scale(1.02);
}

.card-text-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  width: 100%;
}

.card-title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: var(--text-white);
}

.mode-card-btn.active .card-title {
  color: #ffffff;
}

.card-subtitle {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-gray);
  white-space: nowrap;
}

.card-subtitle i {
  width: 13px;
  height: 13px;
  color: var(--accent-red);
}

.mode-card-btn.active .card-subtitle {
  color: #cbd5e1;
}

.card-mobile-icon {
  display: none;
}

/* ==========================================================================
   FORMAL INDUSTRIAL 3D SECTION CUT TOOLBAR
   Minimalist precision CAD aesthetic (dark titanium matte, subtle borders, no flashy neon)
   ========================================================================== */
.section-cut-toolbar {
  position: absolute;
  bottom: 145px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: rgba(13, 19, 32, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 5px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 25;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.section-cut-toolbar.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.sc-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sc-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sc-label {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--text-muted);
}

.sc-divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.1);
}

/* Axis Segmented Pill Selector */
.sc-pill-wrap {
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 5px;
  padding: 2px;
  gap: 2px;
}

.sc-axis-pill {
  background: transparent;
  border: none;
  color: var(--text-gray);
  padding: 3px 8px;
  font-size: 10.5px;
  font-weight: 700;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.sc-axis-pill:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.sc-axis-pill.active {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

/* Precision Depth Slider */
.sc-slider-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}

#sc-depth-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 90px;
  height: 4px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

#sc-depth-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #f8fafc;
  cursor: pointer;
  border: 1.5px solid #0f172a;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
  transition: transform 0.12s ease;
}

#sc-depth-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: #ffffff;
}

.sc-val-badge {
  font-family: monospace;
  font-size: 10px;
  font-weight: 600;
  color: #cbd5e1;
  min-width: 28px;
  text-align: right;
}

/* Action Tools */
.sc-actions-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
}

.sc-action-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 5px;
  padding: 4px 8px;
  color: var(--text-gray);
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}

.sc-action-btn:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.18);
  color: #ffffff;
}

.sc-action-btn i {
  width: 12px;
  height: 12px;
  color: #cbd5e1;
}

.sc-action-btn.active {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.sc-action-btn.active i {
  color: #ffffff;
}

/* Pick button active state: clean subtle red indicator, no pulsing animation */
#btn-sc-pick.active {
  border-color: rgba(225, 29, 72, 0.6);
  background: rgba(225, 29, 72, 0.14);
  color: #fecdd3;
}

#btn-sc-pick.active i {
  color: #f43f5e;
}

/* Close action button */
.sc-close-action {
  padding: 4px 6px;
  border-color: transparent;
  background: transparent;
}

.sc-close-action:hover {
  background: rgba(225, 29, 72, 0.2);
  border-color: rgba(225, 29, 72, 0.35);
  color: #fff;
}

/* ==========================================================================
   RIGHT SIDEBAR: OVERVIEW & SPECS (Matches Screenshot)
   ========================================================================== */
.right-details-sidebar {
  width: var(--right-panel-width);
  height: 100%;
  border-left: 1px solid var(--border-subtle);
  border-top: none;
  border-bottom: none;
  border-right: none;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  background: #070c17;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  overflow: hidden;
  position: relative;
}

.right-details-sidebar.collapsed {
  width: 0;
  min-width: 0;
  border-left: none;
  opacity: 0;
  pointer-events: none;
}

/* Mobile Bottom Sheet Components (Hidden on desktop by default) */
.sheet-drag-handle {
  display: none;
  width: 100%;
  padding: 12px 0 6px 0;
  align-items: center;
  justify-content: center;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.sheet-handle-bar {
  width: 44px;
  height: 5px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.25);
  transition: var(--transition-fast);
}

.sheet-drag-handle:active .sheet-handle-bar {
  background: var(--accent-red);
  box-shadow: 0 0 10px var(--accent-red-glow);
}

.details-sidebar-header-mobile {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 6px 18px 12px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.details-mobile-identity {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.details-mobile-code {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-red);
  font-family: var(--font-tech);
  letter-spacing: 0.8px;
}

.details-mobile-title {
  font-size: 15px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.5px;
}

/* Mobile Drawer & Sheet Backdrop */
.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 16, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 120;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-drawer-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

/* Mobile Bottom Navigation Bar (Hidden on desktop) */
.mobile-bottom-nav-bar {
  display: none;
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  z-index: 30;
  gap: 10px;
  pointer-events: auto;
}

.mobile-nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 16px;
  border-radius: 12px;
  font-family: inherit;
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.8px;
  cursor: pointer;
  transition: var(--transition-fast);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.mobile-nav-btn i,
.mobile-nav-btn svg {
  width: 16px;
  height: 16px;
}

.btn-nav-machines {
  flex: 1;
  background: rgba(13, 22, 40, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-white);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.btn-nav-machines:active {
  transform: scale(0.97);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan-glow);
}

.mobile-badge-count {
  font-size: 10px;
  font-family: var(--font-tech);
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 10px;
  color: var(--accent-cyan);
}

.btn-nav-details {
  flex: 1.25;
  background: linear-gradient(135deg, rgba(225, 29, 72, 0.28), rgba(15, 23, 42, 0.9));
  border: 1px solid var(--accent-red);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 14px var(--accent-red-glow);
}

.btn-nav-details:active {
  transform: scale(0.97);
  background: var(--accent-red);
}

.nav-chevron-icon {
  width: 14px;
  height: 14px;
  margin-left: 2px;
  color: #ffffff;
  transition: transform 0.25s ease;
}

/* Center-Edge Sidebar Toggle Handles (Vertically Centered) */
.sidebar-edge-toggle {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  min-width: 24px;
  height: 52px;
  padding: 0 6px;
  background: rgba(13, 21, 39, 0.95);
  border: 1px solid var(--border-subtle);
  color: var(--text-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.sidebar-edge-toggle:hover {
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: #ffffff;
  box-shadow: 0 0 16px var(--accent-red-glow);
}

.edge-toggle-label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.8px;
  display: none;
  text-transform: uppercase;
  color: var(--text-white);
}

.sidebar-edge-toggle.collapsed-pos .edge-toggle-label {
  display: inline-block;
}

.sidebar-edge-toggle .toggle-arrow-icon,
.sidebar-edge-toggle svg,
.sidebar-edge-toggle i {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  display: block;
  transform-origin: 50% 50%;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar-edge-toggle.collapsed-pos .toggle-arrow-icon,
.sidebar-edge-toggle.collapsed-pos svg,
.sidebar-edge-toggle.collapsed-pos i {
  transform: rotate(180deg) !important;
}

/* Left Edge Toggle Position */
.left-edge-toggle {
  left: var(--left-panel-width);
  border-left: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.left-edge-toggle.collapsed-pos {
  left: 0;
  padding: 0 10px 0 8px;
  background: rgba(13, 21, 39, 0.95);
  border: 1px solid rgba(225, 29, 72, 0.4);
  color: var(--text-white);
}

/* Right Edge Toggle Position */
.right-edge-toggle {
  right: var(--right-panel-width);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.right-edge-toggle.collapsed-pos {
  right: 0;
  padding: 0 8px 0 10px;
  background: rgba(13, 21, 39, 0.95);
  border: 1px solid rgba(225, 29, 72, 0.4);
  color: var(--text-white);
}

/* Right Scrollable Content */
.right-scroll-content {
  flex: 1 1 0%;
  min-height: 0;
  overflow-y: auto;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Overview Content */
.overview-content-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.overview-title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: var(--text-white);
}

.overview-description {
  font-size: 11.5px;
  color: var(--text-gray);
  line-height: 1.55;
}

/* Specifications Grid Table */
.specifications-block {
  display: flex;
  flex-direction: column;
}

.specs-search-container {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  transition: var(--transition-fast);
}

.specs-search-container:focus-within {
  border-color: var(--accent-red);
  box-shadow: 0 0 8px rgba(225, 29, 72, 0.3);
}

.specs-search-icon {
  width: 13px;
  height: 13px;
  color: var(--text-muted);
  flex-shrink: 0;
}

#specs-search-input {
  flex: 1;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 11px;
  font-family: inherit;
  outline: none;
}

#specs-search-input::placeholder {
  color: var(--text-muted);
}

.specs-grid-table {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.spec-row-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
}

.spec-label-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-red);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.spec-label-wrap i {
  width: 14px;
  height: 14px;
  color: var(--text-red);
}

.spec-value {
  color: var(--text-white);
  font-weight: 500;
  font-family: var(--font-sans);
  text-align: right;
}

/* Gallery Strip */
.gallery-strip-block {
  display: flex;
  flex-direction: column;
}

.gallery-thumbnails-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.gallery-thumb-card {
  height: 56px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.gallery-thumb-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), filter 0.3s ease;
}

.gallery-thumb-card:hover {
  border-color: var(--accent-red);
  box-shadow: 0 0 14px var(--accent-red-glow);
  transform: translateY(-2px);
}

.gallery-thumb-card:hover img {
  transform: scale(1.12);
  filter: brightness(1.12);
}

.gallery-thumb-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.gallery-thumb-card:hover .gallery-thumb-overlay {
  opacity: 1;
}

.gallery-thumb-overlay i {
  width: 18px;
  height: 18px;
  color: #ffffff;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.8));
  transform: scale(0.75);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-thumb-card:hover .gallery-thumb-overlay i {
  transform: scale(1);
}

.gallery-thumb-card svg {
  width: 100%;
  height: 100%;
}

/* Download Brochure Pinned Floor Action */
.brochure-action-wrap {
  flex-shrink: 0;
  margin-top: auto;
  padding: 14px 18px 16px 18px;
  background: rgba(7, 12, 23, 0.96);
  border-top: 1px solid var(--border-subtle);
  box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 10;
}

.btn-download-pdf {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  background: var(--accent-red);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 4px 14px var(--accent-red-glow);
  box-sizing: border-box;
}

.btn-download-pdf:hover {
  background: var(--accent-red-hover);
  color: #ffffff;
  box-shadow: 0 6px 22px rgba(225, 29, 72, 0.6);
  transform: translateY(-1px);
}

.btn-download-pdf:active {
  transform: translateY(0);
  background: #be123c;
}

.btn-download-pdf:visited {
  color: #ffffff;
}

.btn-download-pdf i,
.btn-download-pdf svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

/* ==========================================================================
   MODAL & NOTIFICATIONS
   ========================================================================== */
.quote-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.quote-modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.quote-modal-dialog {
  width: 90%;
  max-width: 480px;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(225, 29, 72, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8), 0 0 30px rgba(225, 29, 72, 0.2);
  position: relative;
  transform: scale(0.95);
  transition: transform 0.25s ease;
  background: #0d1527;
}

.quote-modal-backdrop.active .quote-modal-dialog {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  background: transparent;
  border: none;
  color: var(--text-gray);
  cursor: pointer;
}

.modal-header {
  margin-bottom: 18px;
}

.modal-icon {
  width: 36px;
  height: 36px;
  background: rgba(225, 29, 72, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-red);
  margin-bottom: 10px;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
}

.modal-subtitle {
  font-size: 11px;
  color: var(--text-gray);
  margin-top: 4px;
}

.quote-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-gray);
}

.form-group input, .form-group textarea {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  color: #fff;
  font-size: 12px;
  font-family: inherit;
  outline: none;
  transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent-red);
  box-shadow: 0 0 8px rgba(225, 29, 72, 0.3);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.btn-submit-quote {
  background: var(--accent-red);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 6px;
  transition: var(--transition-fast);
  box-shadow: 0 4px 12px var(--accent-red-glow);
}

.btn-submit-quote:hover {
  background: var(--accent-red-hover);
  box-shadow: 0 6px 18px rgba(225, 29, 72, 0.6);
}

/* Sound Prompt Dialog for HOW IT WORKS */
.sound-prompt-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 250;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.sound-prompt-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.sound-prompt-dialog {
  width: 90%;
  max-width: 400px;
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--accent-red);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8), 0 0 25px var(--accent-red-glow);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
  background: #0d1527;
  transform: scale(0.92);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.sound-prompt-backdrop.active .sound-prompt-dialog {
  transform: scale(1);
}

.prompt-icon-wrap {
  width: 48px;
  height: 48px;
  background: rgba(225, 29, 72, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-red);
}

.prompt-icon-wrap i {
  width: 24px;
  height: 24px;
}

.prompt-body-text {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.prompt-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-white);
}

.prompt-desc {
  font-size: 11.5px;
  color: var(--text-gray);
  line-height: 1.5;
}

.prompt-actions-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  margin-top: 6px;
}

.btn-prompt-dismiss {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-gray);
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-prompt-dismiss:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-white);
}

.btn-prompt-dismiss i {
  width: 14px;
  height: 14px;
}

.btn-prompt-confirm {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--accent-red);
  border: none;
  color: #fff;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 0 12px var(--accent-red-glow);
  transition: var(--transition-fast);
}

.btn-prompt-confirm:hover {
  background: var(--accent-red-hover);
  box-shadow: 0 0 18px rgba(225, 29, 72, 0.6);
}

.btn-prompt-confirm i {
  width: 14px;
  height: 14px;
}

/* ==========================================================================
   IMAGE GALLERY LIGHTBOX MODAL
   ========================================================================== */
.gallery-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 15, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  outline: none;
  padding: 24px;
}

.gallery-modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.gallery-modal-dialog {
  width: 100%;
  max-width: 1000px;
  height: 86vh;
  max-height: 800px;
  background: radial-gradient(circle at 50% 15%, #131c31, #080d1a 90%);
  border: 1px solid rgba(225, 29, 72, 0.35);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.92), 0 0 40px rgba(225, 29, 72, 0.25);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  transform: scale(0.95);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-modal-backdrop.active .gallery-modal-dialog {
  transform: scale(1);
}

/* Lightbox Top Header */
.gallery-modal-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 16, 30, 0.85);
  flex-shrink: 0;
}

.gallery-top-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.gallery-top-badge {
  display: flex;
  align-items: center;
  gap: 7px;
  background: rgba(225, 29, 72, 0.15);
  border: 1px solid rgba(225, 29, 72, 0.4);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: #ffffff;
}

.gallery-top-badge i {
  width: 14px;
  height: 14px;
  color: var(--accent-red);
}

.gallery-modal-counter {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-gray);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 1px;
}

.gallery-top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.gallery-modal-close-btn {
  width: 34px;
  height: 34px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  color: var(--text-gray);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.gallery-modal-close-btn:hover {
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: #ffffff;
  box-shadow: 0 0 16px var(--accent-red-glow);
  transform: rotate(90deg);
}

.gallery-modal-close-btn i {
  width: 18px;
  height: 18px;
}

/* Lightbox Main Viewport & Navigation */
.gallery-modal-main {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 20px;
  overflow: hidden;
  min-height: 0;
}

.gallery-image-viewport {
  width: 100%;
  max-width: 860px;
  height: 100%;
  max-height: 520px;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #060a14;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.85), 0 0 24px rgba(225, 29, 72, 0.15);
}

.gallery-modal-bg-blur {
  position: absolute;
  inset: -20px;
  background-size: cover;
  background-position: center;
  filter: blur(28px) brightness(0.35);
  opacity: 0.75;
  transform: scale(1.1);
  transition: background-image 0.25s ease, opacity 0.25s ease;
  pointer-events: none;
  z-index: 1;
}

.gallery-modal-img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: cover;
  object-position: center;
  position: relative;
  z-index: 2;
  border-radius: var(--radius-md);
  transition: opacity 0.22s ease, transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 1;
  user-select: none;
  -webkit-user-drag: none;
}

.gallery-modal-img.changing {
  opacity: 0.15;
  transform: scale(0.97);
}

.gallery-img-spinner {
  display: none;
  position: absolute;
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-red);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  z-index: 5;
}

.gallery-img-spinner.active {
  display: block;
}

/* Floating Navigation Arrows */
.gallery-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(12, 19, 36, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(10px);
}

.gallery-nav-btn:hover {
  background: var(--accent-red);
  border-color: var(--accent-red);
  box-shadow: 0 0 20px var(--accent-red-glow);
  transform: translateY(-50%) scale(1.1);
}

.gallery-nav-btn i {
  width: 24px;
  height: 24px;
}

.gallery-prev-btn {
  left: 20px;
}

.gallery-next-btn {
  right: 20px;
}

/* Lightbox Bottom Bar */
.gallery-modal-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 16, 30, 0.88);
  gap: 16px;
  flex-shrink: 0;
}

.gallery-caption-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.gallery-caption-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-white);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gallery-caption-text {
  font-size: 11px;
  color: var(--text-gray);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gallery-modal-thumbnails-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.gallery-modal-thumb-item {
  width: 62px;
  height: 42px;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  border: 2px solid rgba(255, 255, 255, 0.12);
  opacity: 0.5;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  background: #0f172a;
  flex-shrink: 0;
}

.gallery-modal-thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.gallery-modal-thumb-item:hover {
  opacity: 0.85;
  border-color: rgba(225, 29, 72, 0.6);
  transform: translateY(-2px);
}

.gallery-modal-thumb-item.active {
  opacity: 1;
  border-color: var(--accent-red);
  box-shadow: 0 0 12px var(--accent-red-glow);
  transform: scale(1.06);
}
/* ==========================================================================
   RESPONSIVE ADJUSTMENTS — MODERN MOBILE UI/UX
   ========================================================================== */
@media (max-width: 1024px) {
  /* 1. Hide Desktop Center-Edge Toggle Buttons completely on touch/mobile screens */
  .sidebar-edge-toggle {
    display: none !important;
  }

  /* 2. Show Mobile Header Quick Action Buttons */
  .mobile-header-btn {
    display: flex !important;
  }

  /* 3. Keep Workspace Full Height & Prevent Broken Column Stacking */
  .studio-workspace-container {
    position: relative !important;
    width: 100% !important;
    height: calc(100vh - var(--header-height)) !important;
    height: calc(100dvh - var(--header-height)) !important;
    overflow: hidden !important;
    display: block !important;
    z-index: 100 !important;
  }

  /* 4. Center 3D Viewport is Always Full Screen */
  .center-viewport-panel {
    position: absolute !important;
    inset: 0 !important;
    width: 100% !important;
    height: 100% !important;
    z-index: 1 !important;
  }

  /* 5. Left Panel: Modern Slide-Over Drawer */
  .left-machines-sidebar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    bottom: 0 !important;
    width: min(340px, 86vw) !important;
    height: 100% !important;
    z-index: 250 !important;
    transform: translateX(-105%) !important;
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1) !important;
    background: rgba(8, 14, 26, 0.97) !important;
    backdrop-filter: blur(28px) !important;
    -webkit-backdrop-filter: blur(28px) !important;
    border-right: 1px solid rgba(225, 29, 72, 0.3) !important;
    border-left: none !important;
    box-shadow: 12px 0 40px rgba(0, 0, 0, 0.85) !important;
    display: flex !important;
    flex-direction: column !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    padding-top: env(safe-area-inset-top, 0px) !important;
    padding-bottom: env(safe-area-inset-bottom, 12px) !important;
  }

  .machines-sidebar-header {
    height: 54px !important;
    padding: 0 16px !important;
    background: rgba(10, 16, 30, 0.98) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
    flex-shrink: 0 !important;
  }

  .left-machines-sidebar.mobile-open {
    transform: translateX(0) !important;
  }

  /* 6. Right Panel: High-Tech Expandable Bottom Sheet */
  .right-details-sidebar {
    position: fixed !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100% !important;
    height: 85vh !important;
    max-height: 85vh !important;
    z-index: 250 !important;
    transform: translateY(105%) !important;
    transition: transform 0.38s cubic-bezier(0.16, 1, 0.3, 1) !important;
    background: rgba(8, 14, 26, 0.98) !important;
    backdrop-filter: blur(32px) !important;
    -webkit-backdrop-filter: blur(32px) !important;
    border-top: 2px solid var(--accent-red) !important;
    border-left: 1px solid rgba(255, 255, 255, 0.08) !important;
    border-right: 1px solid rgba(255, 255, 255, 0.08) !important;
    border-bottom: none !important;
    border-radius: 14px 14px 0 0 !important;
    box-shadow: 0 -12px 48px rgba(0, 0, 0, 0.9), 0 0 20px var(--accent-red-glow) !important;
    display: flex !important;
    flex-direction: column !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    overflow: hidden !important;
    padding-bottom: env(safe-area-inset-bottom, 12px) !important;
  }

  .right-details-sidebar.mobile-open {
    transform: translateY(0) !important;
  }

  .mobile-drawer-backdrop {
    z-index: 220 !important;
  }


  /* 7. Show Mobile Close Buttons and Handles */
  .sidebar-close-btn {
    display: flex !important;
  }

  .sheet-drag-handle {
    display: flex !important;
  }

  .details-sidebar-header-mobile {
    display: flex !important;
  }

  .brochure-action-wrap {
    padding: 10px 16px 14px 16px !important;
    background: rgba(8, 14, 26, 0.98) !important;
  }

  .mobile-bottom-nav-bar {
    display: flex !important;
    position: absolute !important;
    bottom: max(10px, env(safe-area-inset-bottom, 10px)) !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: calc(100% - 20px) !important;
    max-width: 480px !important;
    z-index: 30 !important;
  }

  .btn-nav-details {
    width: 100% !important;
    flex: 1 !important;
    height: 44px !important;
    border-radius: 8px !important;
    background: linear-gradient(135deg, rgba(225, 29, 72, 0.28), rgba(15, 23, 42, 0.9)) !important;
    border: 1px solid var(--accent-red) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 14px var(--accent-red-glow) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    font-size: 11.5px !important;
    font-weight: 800 !important;
    letter-spacing: 0.8px !important;
    cursor: pointer !important;
    outline: none !important;
    transition: var(--transition-fast) !important;
  }

  .btn-nav-details:active {
    transform: scale(0.98) !important;
    background: var(--accent-red) !important;
  }

  /* 8. Floating Mode Cards Dock (5 Cards with Desktop CAD Icons) */
  .viewport-bottom-dock {
    position: absolute !important;
    bottom: 62px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: calc(100% - 16px) !important;
    max-width: 520px !important;
    display: grid !important;
    grid-template-columns: repeat(5, 1fr) !important;
    gap: 4px !important;
    padding: 3px !important;
    background: rgba(8, 14, 28, 0.92) !important;
    border: 1px solid rgba(255, 255, 255, 0.12) !important;
    border-radius: 10px !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
    box-shadow: 0 10px 32px rgba(0, 0, 0, 0.75) !important;
    z-index: 25 !important;
  }

  /* Mobile Section Cut Toolbar: Clean, compact, formal 2-row layout */
  .section-cut-toolbar {
    bottom: 132px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: calc(100% - 16px) !important;
    max-width: 440px !important;
    padding: 6px 10px !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 6px !important;
    border-radius: 8px !important;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.65) !important;
  }

  .section-cut-toolbar.active {
    display: flex !important;
    transform: translateX(-50%) !important;
  }

  .section-cut-toolbar .sc-row-top {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    gap: 8px !important;
  }

  .section-cut-toolbar .sc-row-bottom {
    display: flex !important;
    align-items: center !important;
    width: 100% !important;
    border-top: 1px solid rgba(255, 255, 255, 0.06) !important;
    padding-top: 5px !important;
  }

  .section-cut-toolbar .sc-actions-wrap {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    gap: 4px !important;
  }

  .section-cut-toolbar .sc-desktop-divider {
    display: none !important;
  }

  .section-cut-toolbar #sc-depth-slider {
    width: 80px !important;
  }

  .section-cut-toolbar .sc-action-btn {
    padding: 4px 6px !important;
    font-size: 9.5px !important;
    flex: 1 !important;
    justify-content: center !important;
  }

  .section-cut-toolbar .sc-close-action {
    flex: 0 0 26px !important;
  }

  .mode-card-btn {
    flex-direction: column !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding: 3px 2px 4px 2px !important;
    border-radius: 7px !important;
    min-height: 64px !important;
    gap: 2px !important;
    background: rgba(14, 23, 42, 0.75) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    transition: var(--transition-fast) !important;
  }

  .mode-card-btn .card-thumb-container {
    display: flex !important;
    width: 100% !important;
    height: 38px !important;
    background: rgba(7, 13, 24, 0.8) !important;
    border-radius: 5px !important;
    border: 1px solid rgba(255, 255, 255, 0.06) !important;
    margin: 0 !important;
    padding: 2px !important;
    align-items: center !important;
    justify-content: center !important;
    overflow: hidden !important;
    transition: var(--transition-fast) !important;
  }

  .card-thumb-canvas {
    display: flex !important;
    width: 100% !important;
    height: 100% !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 0 !important;
  }

  .mode-svg-icon {
    display: block !important;
    width: auto !important;
    height: 32px !important;
    max-width: 100% !important;
    max-height: 32px !important;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.75)) !important;
    transition: transform var(--transition-fast) !important;
  }

  .card-mobile-icon {
    display: none !important;
  }

  .mode-card-btn .card-text-group {
    align-items: center !important;
    text-align: center !important;
    width: 100% !important;
    margin: 0 !important;
  }

  .mode-card-btn .card-title {
    font-size: 8px !important;
    font-weight: 700 !important;
    letter-spacing: 0.2px !important;
    white-space: nowrap !important;
    line-height: 1 !important;
    color: #94a3b8 !important;
    text-align: center !important;
  }

  .mode-card-btn .card-subtitle {
    display: none !important;
  }

  .mode-card-btn:hover {
    background: rgba(255, 255, 255, 0.08) !important;
  }

  .mode-card-btn.active {
    background: rgba(225, 29, 72, 0.16) !important;
    border-color: var(--accent-red) !important;
    box-shadow: 0 0 16px rgba(225, 29, 72, 0.4) !important;
  }

  .mode-card-btn.active .card-thumb-container {
    background: rgba(26, 12, 22, 0.85) !important;
    border-color: rgba(225, 29, 72, 0.45) !important;
  }

  .mode-card-btn.active .mode-svg-icon {
    transform: scale(1.05) !important;
  }

  .mode-card-btn.active .card-title {
    color: #ffffff !important;
    font-weight: 800 !important;
    text-shadow: 0 0 8px rgba(225, 29, 72, 0.6) !important;
  }

  .mode-card-btn:hover {
    background: rgba(255, 255, 255, 0.08) !important;
  }

  .mode-card-btn.active {
    background: rgba(225, 29, 72, 0.16) !important;
    border-color: var(--accent-red) !important;
    box-shadow: 0 0 16px rgba(225, 29, 72, 0.4) !important;
  }

  .mode-card-btn.active .card-thumb-container {
    background: rgba(26, 12, 22, 0.85) !important;
    border-color: rgba(225, 29, 72, 0.45) !important;
  }

  .mode-card-btn.active .mode-svg-icon {
    transform: scale(1.05) !important;
  }

  .mode-card-btn.active .card-title {
    color: #ffffff !important;
    font-weight: 800 !important;
    text-shadow: 0 0 8px rgba(225, 29, 72, 0.6) !important;
  }

  /* 9. Viewport Top Overlay on Mobile */
  .viewport-top-overlay {
    top: 10px !important;
    left: 12px !important;
    right: 12px !important;
  }

  .identity-main-row {
    gap: 6px !important;
  }

  .accent-number {
    font-size: 20px !important;
  }

  .machine-heading {
    font-size: 15px !important;
    letter-spacing: 0.5px !important;
  }

  .machine-model-code {
    font-size: 11px !important;
    margin-top: 2px !important;
  }

  .vtool-btn {
    width: 32px !important;
    height: 32px !important;
  }

  .vtool-btn i,
  .vtool-btn svg {
    width: 15px !important;
    height: 15px !important;
  }

  /* 10. Specifications Table on Mobile */
  .specs-grid-table {
    grid-template-columns: 1fr !important;
    gap: 6px !important;
  }

  .spec-item-row {
    padding: 8px 10px !important;
  }

  /* 11. Lightbox Responsive */
  .gallery-modal-backdrop {
    padding: 12px !important;
  }

  .gallery-modal-dialog {
    height: 94vh !important;
  }

  .gallery-modal-bottom-bar {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
    padding: 10px 14px !important;
  }

  .gallery-modal-thumbnails-strip {
    width: 100% !important;
    overflow-x: auto !important;
    padding-bottom: 2px !important;
  }

  .gallery-nav-btn {
    width: 38px !important;
    height: 38px !important;
  }

  .gallery-prev-btn {
    left: 10px !important;
  }

  .gallery-next-btn {
    right: 10px !important;
  }
}

/* ==========================================================================
   EXTRA COMPACT SMARTPHONES (< 480px)
   ========================================================================== */
@media (max-width: 480px) {
  .app-header {
    height: 52px !important;
    padding: 0 10px !important;
  }

  .brand-logo-icon {
    width: 28px !important;
    height: 28px !important;
  }

  .brand-title {
    font-size: 11px !important;
  }

  .brand-subtitle {
    font-size: 11px !important;
  }

  .header-right-tools {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-end !important;
    margin-left: auto !important;
    max-width: 150px !important;
  }

  .header-machine-badge {
    font-size: 11px !important;
    font-weight: 700 !important;
    padding: 0 !important;
    background: transparent !important;
    border: none !important;
    max-width: 140px !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .mobile-header-btn span {
    display: none !important;
  }

  .mobile-header-btn {
    padding: 6px 8px !important;
    border-radius: var(--radius-sm) !important;
  }

  .viewport-bottom-dock {
    bottom: 58px !important;
    width: calc(100% - 16px) !important;
    gap: 4px !important;
    padding: 3px !important;
  }

  .mode-card-btn {
    min-height: 60px !important;
    padding: 2px 2px 3px 2px !important;
  }

  .mode-card-btn .card-thumb-container {
    width: 100% !important;
    height: 35px !important;
  }

  .mode-card-btn .mode-svg-icon {
    height: 28px !important;
    max-height: 28px !important;
  }

  .mode-card-btn .card-title {
    font-size: 7.5px !important;
    letter-spacing: 0.1px !important;
  }

  .mobile-bottom-nav-bar {
    display: flex !important;
    bottom: max(8px, env(safe-area-inset-bottom, 8px)) !important;
    width: calc(100% - 16px) !important;
  }

  .btn-nav-details {
    height: 42px !important;
    font-size: 11px !important;
  }

  .right-details-sidebar {
    height: 86vh !important;
    max-height: 86vh !important;
  }

  .gallery-thumbnails-grid {
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 6px !important;
  }


  .isolated-part-hud {
    top: 60px !important;
    max-width: calc(100vw - 24px) !important;
  }

  .isolated-hud-content {
    padding: 4px 8px !important;
    gap: 6px !important;
  }

  .hud-part-title {
    font-size: 9.5px !important;
  }

  .btn-restore-parts {
    padding: 3px 6px !important;
    font-size: 9px !important;
  }
}

/* ==========================================================================
   FORMAL INDUSTRIAL 3D ISOLATED PART HUD & TOOLTIP
   Minimalist precision CAD aesthetic matching Section Cut Toolbar
   ========================================================================== */

/* Floating Isolated Component HUD Banner */
.isolated-part-hud {
  position: absolute;
  top: 72px;
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  z-index: 30;
  display: flex;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.isolated-part-hud.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.isolated-hud-content {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(13, 19, 32, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 5px 10px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55);
}

.isolated-hud-badge {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hud-status-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #e11d48;
  flex-shrink: 0;
}

.hud-part-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: #ffffff;
  text-transform: uppercase;
}

.hud-divider {
  width: 1px;
  height: 16px;
  background: rgba(255, 255, 255, 0.12);
}

.btn-restore-parts {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 5px;
  padding: 4px 8px;
  color: var(--text-gray);
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  outline: none;
}

.btn-restore-parts i {
  width: 11px;
  height: 11px;
  color: #cbd5e1;
}

.btn-restore-parts:hover {
  background: rgba(225, 29, 72, 0.14);
  border-color: rgba(225, 29, 72, 0.4);
  color: #ffffff;
}

.btn-restore-parts:hover i {
  color: #f43f5e;
}

/* 3D Hover Tooltip for Exploded View Parts - Clean Minimalist Industrial */
.part-hover-tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  background: rgba(13, 19, 32, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 5px 10px;
  border-radius: 6px;
  transform: translate(-50%, -130%);
  opacity: 0;
  transition: opacity 0.15s ease;
  white-space: nowrap;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.part-hover-tooltip.visible {
  opacity: 1;
}

.part-hover-tooltip .tooltip-title {
  font-size: 11px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.3px;
}

.part-hover-tooltip .tooltip-action {
  font-size: 9px;
  font-weight: 600;
  color: var(--text-muted);
}