/* ==========================================================================
   PicDriver Histogram & Technical Image Analysis - Master Stylesheet
   (c) 2026 PicDriver - Decoupled Architecture
   ========================================================================== */

:root {
  --bg: #07080d;
  --surface: #0e111a;
  --surface-raised: #141926;
  --surface-hover: #1c2336;
  --border: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(6, 182, 212, 0.5);

  --text: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent: #06b6d4;        /* Cyan */
  --accent-rgb: 6, 182, 212;
  --accent-red: #ef4444;    /* Red Channel / Highlight Clipping */
  --accent-green: #10b981;  /* Green Channel / Optimal */
  --accent-blue: #3b82f6;   /* Blue Channel / Shadow Clipping */
  --accent-amber: #f59e0b;  /* Amber / Warning */
  --accent-purple: #8b5cf6; /* Violet */

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Space Mono', monospace;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 25px rgba(6, 182, 212, 0.25);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(6, 182, 212, 0.12), transparent 70%),
    radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.06), transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(239, 68, 68, 0.06), transparent 40%);
  background-attachment: fixed;
}

/* Header */
.site-header {
  height: 64px;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 8, 13, 0.85);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
}

.logo-badge {
  background: linear-gradient(135deg, var(--accent), var(--accent-purple));
  color: #fff;
  font-family: var(--font-main);
  font-weight: 800;
  font-size: 0.82rem;
  padding: 4px 9px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.5px;
}

.logo-text {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.logo-text span {
  color: var(--accent);
}

/* Hero Section */
.hero {
  padding: 36px 24px 20px;
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  color: var(--accent);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-main);
  margin-bottom: 16px;
}

.hero h1 {
  font-family: var(--font-main);
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 40%, var(--accent) 75%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 780px;
  margin: 0 auto;
}

/* 17 Tool Chips Container */
.chips-container {
  max-width: 1400px;
  margin: 0 auto 24px;
  padding: 0 20px;
}

.chips-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tool-chips-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.tool-chip:hover {
  background: var(--surface-hover);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.tool-chip.active {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(139, 92, 246, 0.2));
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.3);
}

.tool-chip.fire {
  border-color: rgba(245, 158, 11, 0.3);
}

.tool-chip.fire.active {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(239, 68, 68, 0.25));
  border-color: var(--accent-amber);
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.35);
}

/* Main Workspace */
.workspace {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px 40px;
  display: grid;
  grid-template-columns: 460px 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}

/* Panel Cards */
.panel-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.panel-title {
  font-family: var(--font-main);
  font-size: 1.12rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel-badge {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* Active Tool Banner */
.active-tool-banner {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.08), rgba(139, 92, 246, 0.08));
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 20px;
  transition: all 0.3s ease;
}

.banner-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.banner-tag {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  font-weight: 700;
  text-transform: uppercase;
  background: var(--accent);
  color: #000;
  padding: 2px 7px;
  border-radius: 4px;
}

.banner-title {
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

.banner-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Mode Navigation Tabs */
.mode-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  background: var(--surface-raised);
  padding: 4px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.mode-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-main);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 8px 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.mode-tab-btn:hover {
  color: #fff;
}

.mode-tab-btn.active {
  background: var(--surface);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

/* Drop Zone */
.drop-zone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.01);
  transition: all 0.25s ease;
  margin-bottom: 18px;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(6, 182, 212, 0.05);
}

.drop-zone-icon {
  width: 32px;
  height: 32px;
  stroke: var(--accent);
  stroke-width: 1.8;
  margin-bottom: 8px;
}

.drop-zone-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 2px;
}

.drop-zone-sub {
  font-size: 0.74rem;
  color: var(--text-dim);
}

.drop-zone input[type="file"] {
  display: none;
}

/* Sample Presets Grid */
.sample-presets-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 18px;
}

.sample-chip {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
  text-align: left;
}

.sample-chip:hover {
  background: var(--surface-hover);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

.sample-chip.active {
  border-color: var(--accent);
  color: #fff;
  background: rgba(6, 182, 212, 0.12);
}

/* Interactive Toggles & Controls */
.form-group {
  margin-bottom: 14px;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-hint {
  font-size: 0.72rem;
  color: var(--text-dim);
}

.channel-selector-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin-bottom: 14px;
}

.channel-btn {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 7px 4px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
}

.channel-btn:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

.channel-btn.active[data-channel="rgb"] {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.3), rgba(16, 185, 129, 0.3), rgba(59, 130, 246, 0.3));
  border-color: #fff;
  color: #fff;
}
.channel-btn.active[data-channel="lum"] {
  background: rgba(6, 182, 212, 0.2);
  border-color: var(--accent);
  color: #fff;
}
.channel-btn.active[data-channel="red"] {
  background: rgba(239, 68, 68, 0.25);
  border-color: var(--accent-red);
  color: #fff;
}
.channel-btn.active[data-channel="green"] {
  background: rgba(16, 185, 129, 0.25);
  border-color: var(--accent-green);
  color: #fff;
}
.channel-btn.active[data-channel="blue"] {
  background: rgba(59, 130, 246, 0.25);
  border-color: var(--accent-blue);
  color: #fff;
}

/* Zebra Overlay Toggle Switch */
.toggle-switch-card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.toggle-info-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toggle-info-desc {
  font-size: 0.72rem;
  color: var(--text-dim);
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider-toggle {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #334155;
  transition: .3s;
  border-radius: 24px;
}

.slider-toggle:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider-toggle {
  background-color: var(--accent);
}

input:checked + .slider-toggle:before {
  transform: translateX(20px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-purple));
  color: #fff;
  box-shadow: 0 4px 16px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
}

.btn-group {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

/* Right Column: Results Area */
.results-area {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 6 Featured Metric Cards */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

@media (max-width: 768px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  position: relative;
  overflow: hidden;
  transition: all 0.25s ease;
}

.metric-card.featured-primary {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.2);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.08), var(--surface));
}

.metric-card.cyan::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent); }
.metric-card.red::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent-red); }
.metric-card.blue::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent-blue); }
.metric-card.emerald::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent-green); }
.metric-card.amber::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent-amber); }
.metric-card.purple::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent-purple); }

.metric-label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.metric-val span {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

.metric-sub {
  font-size: 0.74rem;
  color: var(--text-dim);
}

/* Visual Stage Cards */
.vis-stage-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.vis-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.vis-title {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Histogram Display Canvas Viewport */
.histogram-viewport {
  position: relative;
  background: #040508;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  overflow: hidden;
}

#histogram-canvas {
  width: 100%;
  height: 220px;
  display: block;
  cursor: crosshair;
}

/* 5 Tonal Zone Bar Under Histogram */
.tonal-zones-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 2px;
  margin-top: 8px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.tonal-zone-item {
  background: var(--surface-raised);
  padding: 4px 6px;
  text-align: center;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-dim);
}

.tonal-zone-item strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #fff;
}

/* Image Viewport Canvas & Zebra Overlay */
.image-viewport-container {
  position: relative;
  background: #020408;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#image-display-canvas {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Clipping Badges */
.clipping-alert-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 700;
}

.clipping-alert-pill.red {
  background: rgba(239, 68, 68, 0.18);
  border: 1px solid var(--accent-red);
  color: var(--accent-red);
}

.clipping-alert-pill.blue {
  background: rgba(59, 130, 246, 0.18);
  border: 1px solid var(--accent-blue);
  color: var(--accent-blue);
}

.clipping-alert-pill.green {
  background: rgba(16, 185, 129, 0.18);
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
}

/* Master Data Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.data-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--surface-raised);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.74rem;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.table-responsive {
  overflow-x: auto;
}

/* Educational Content */
.content-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
}

.article-card h2 {
  font-family: var(--font-main);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
}

.article-card h3 {
  font-family: var(--font-main);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 24px 0 10px;
  color: var(--accent);
}

.article-card p {
  color: var(--text-muted);
  font-size: 0.94rem;
  margin-bottom: 14px;
}

.article-card ul {
  padding-left: 20px;
  margin-bottom: 16px;
  color: var(--text-muted);
  font-size: 0.94rem;
}

.article-card li {
  margin-bottom: 8px;
}

.formula-box {
  background: #040508;
  border-left: 3px solid var(--accent);
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: #fff;
  margin: 14px 0;
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-q {
  padding: 14px 18px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  color: #fff;
}

.faq-q svg {
  width: 18px;
  height: 18px;
  stroke: var(--accent);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq-a {
  padding: 0 18px 16px;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.55;
  display: none;
}

.faq-item.open .faq-a {
  display: block;
}

.faq-item.open .faq-q svg {
  transform: rotate(45deg);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: rgba(14, 17, 26, 0.95);
  border: 1px solid var(--accent);
  backdrop-filter: blur(12px);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  z-index: 999;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: auto;
}


/* ==========================================================================
   Universal Mobile & Tablet Responsiveness Suite (320px - 1040px)
   ========================================================================== */

/* 1. Fluid Media & Canvas Scaling */
img, canvas, svg, video {
  max-width: 100% !important;
  height: auto !important;
}

/* 2. Responsive Touch-Scroll Tables */
table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
}

.table-responsive,
.table-container,
.table-wrap,
.table-wrapper,
.matrix-container,
.data-table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* 3. Tablet Breakpoint (<= 1040px) */
@media (max-width: 1040px) {
  .workspace,
  .studio-layout,
  .finder-workspace,
  .simulator-grid,
  .layout-grid,
  .remover-workspace {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .sidebar-panel,
  .controls-sidebar {
    border-left: none !important;
    border-top: 1px solid var(--border, rgba(255,255,255,0.1));
  }
}

/* 4. Mobile Portrait & Landscape (<= 768px) */
@media (max-width: 768px) {
  .site-header {
    height: auto !important;
    padding: 10px 16px !important;
  }

  .header-inner,
  .header-container {
    flex-wrap: wrap;
    gap: 10px;
    justify-content: space-between;
    width: 100%;
  }

  .logo,
  .brand-logo,
  .logo-wrap {
    font-size: 1.15rem !important;
  }

  .menu-toggle {
    display: block !important;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #0a0d14;
    flex-direction: column;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border, rgba(255,255,255,0.1));
    z-index: 1000;
  }

  .nav-links.open {
    display: flex !important;
  }

  .hero {
    padding: 28px 16px 20px !important;
  }

  .hero h1 {
    font-size: clamp(1.6rem, 5.5vw, 2.3rem) !important;
    line-height: 1.2 !important;
  }

  .hero p {
    font-size: 0.92rem !important;
  }

  .page-wrapper,
  .portal-main,
  .container {
    padding: 16px 12px 40px !important;
  }

  .workspace,
  .studio-layout,
  .finder-workspace,
  .remover-workspace {
    padding: 0 !important;
    gap: 16px !important;
  }

  .panel-card,
  .results-card,
  .sidebar-panel,
  .stage-area,
  .card {
    padding: 16px 14px !important;
    border-radius: 12px !important;
  }

  .metrics-grid,
  .data-grid,
  .grid-2,
  .grid-3,
  .grid-4,
  .calc-grid,
  .features-grid,
  .steps-grid {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }

  .tool-chips-grid,
  .chips-bar,
  .preset-chip-group,
  .mode-tabs {
    flex-wrap: wrap !important;
    gap: 6px !important;
  }

  .tool-chip,
  .preset-btn,
  .mode-tab-btn {
    padding: 6px 12px !important;
    font-size: 0.78rem !important;
  }

  .btn-primary,
  .btn-secondary,
  .action-btn,
  .btn-action {
    min-height: 44px;
    width: 100%;
    justify-content: center;
  }

  .btn-group,
  .action-btns,
  .download-row {
    flex-direction: column !important;
    width: 100% !important;
    gap: 8px !important;
  }

  table {
    display: block !important;
    width: 100% !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    white-space: nowrap !important;
  }

  th, td {
    padding: 8px 10px !important;
    font-size: 0.8rem !important;
  }
}

/* 5. Small Handsets (<= 480px) */
@media (max-width: 480px) {
  .hero-pill,
  .hero-badge {
    font-size: 0.72rem !important;
    padding: 3px 10px !important;
  }

  .form-group {
    margin-bottom: 14px !important;
  }

  .form-control,
  .form-select,
  .control-input,
  .control-select,
  input[type="text"],
  input[type="number"],
  select {
    font-size: 16px !important; /* Prevents auto-zoom in iOS Safari */
    min-height: 42px;
  }

  .info-section,
  .guide-section,
  .faq-section {
    padding: 24px 12px !important;
  }
}