/**
 * style.css
 * CMYK Simulator — Complete Stylesheet
 *
 * Design direction: Precision Darkroom — Industrial, technical, trustworthy.
 * Like a professional print studio dashboard. Dark, focused, no decoration for decoration's sake.
 *
 * Typography: "Barlow Condensed" (headings — tight, confident) + "DM Mono" (values — technical)
 * Color palette: Near-black base + CMYK channel colors as accent system
 */

/* ─── CUSTOM PROPERTIES ──────────────────────────────────────────────────── */
:root {
  /* Base palette */
  --bg-base:      #0C0C12;
  --bg-surface:   #13131C;
  --bg-raised:    #1A1A27;
  --bg-overlay:   #22223A;
  --border:       rgba(255,255,255,0.08);
  --border-strong:rgba(255,255,255,0.15);

  /* Text */
  --text-primary:   #EEEEF2;
  --text-secondary: #9999B3;
  --text-muted:     #55556A;

  /* CMYK Channel Colors — the visual identity of this tool */
  --cyan:    #00C8E8;
  --magenta: #E8198C;
  --yellow:  #FFDA00;
  --key:     #EEEEF2;    /* white-ish, since true black would disappear on dark bg */

  /* Semantic */
  --safe:    #1ABA8E;
  --caution: #F59E0B;
  --danger:  #EF4444;

  /* Spacing system — base unit 8px */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;

  /* Typography */
  --font-ui: 'Barlow Condensed', 'Arial Narrow', Arial, sans-serif;
  --font-mono: 'DM Mono', 'Courier New', monospace;
  --font-body: 'Barlow', Arial, sans-serif;

  /* Radius */
  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  /* Subtle grid texture */
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 40px 40px;
}

img, canvas, video, svg {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

a {
  color: var(--cyan);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ─── SKIP LINK ──────────────────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--sp-4);
  padding: var(--sp-2) var(--sp-4);
  background: var(--cyan);
  color: var(--bg-base);
  font-weight: 700;
  font-size: 0.875rem;
  z-index: 9999;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.skip-link:focus {
  top: 0;
}

/* ─── LIVE REGION (screen reader) ────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ─── NAV ────────────────────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-8);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12,12,18,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  color: var(--text-primary);
}

.nav-logo-mark {
  display: flex;
  gap: 2px;
  align-items: center;
}

.nav-logo-mark span {
  display: block;
  width: 7px;
  height: 20px;
  border-radius: 1px;
}

.nav-logo-mark .c { background: var(--cyan); }
.nav-logo-mark .m { background: var(--magenta); }
.nav-logo-mark .y { background: var(--yellow); margin-top: 4px; }
.nav-logo-mark .k { background: var(--key); margin-top: 8px; }

.nav-logo-text {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1;
}

.nav-logo-text small {
  display: block;
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  margin-top: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.nav-links a:hover { color: var(--text-primary); }

.nav-github {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary) !important;
  transition: border-color 0.15s, color 0.15s !important;
}

.nav-github:hover {
  border-color: var(--cyan);
  color: var(--cyan) !important;
  text-decoration: none !important;
}

/* ─── MAIN LAYOUT ────────────────────────────────────────────────────────── */
main {
  min-height: calc(100vh - 60px);
}

/* ─── HERO / UPLOAD SECTION ──────────────────────────────────────────────── */
#upload-section {
  max-width: 860px;
  margin: 0 auto;
  padding: var(--sp-16) var(--sp-8) var(--sp-12);
  text-align: center;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: var(--sp-4);
}

.hero-title {
  font-family: var(--font-ui);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.05;
  margin-bottom: var(--sp-4);
  /* CMYK gradient on last word */
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto var(--sp-10);
  line-height: 1.65;
}

/* ─── UPLOAD ZONE ────────────────────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--sp-12) var(--sp-8);
  cursor: pointer;
  background: var(--bg-surface);
  position: relative;
  outline: none;
}

.upload-zone:hover,
.upload-zone:focus-visible {
  border-color: var(--cyan);
  background: rgba(0,200,232,0.03);
}

.upload-zone.drag-over {
  border-color: var(--cyan);
  background: rgba(0,200,232,0.06);
}

.upload-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto var(--sp-4);
  color: var(--text-muted);
}

.upload-zone:hover .upload-icon,
.upload-zone.drag-over .upload-icon {
  color: var(--cyan);
}

.upload-headline {
  font-family: var(--font-ui);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text-primary);
  margin-bottom: var(--sp-2);
}

.upload-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.upload-sub strong {
  color: var(--text-secondary);
}

.upload-formats {
  display: flex;
  justify-content: center;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.format-chip {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-muted);
}

/* ─── RESIZED NOTICE ─────────────────────────────────────────────────────── */
.resized-notice {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius-sm);
  padding: var(--sp-2) var(--sp-4);
  font-size: 0.8rem;
  color: var(--caution);
  margin-bottom: var(--sp-4);
}

/* ─── WORKSPACE LAYOUT ───────────────────────────────────────────────────── */
#workspace {
  display: grid;
  grid-template-columns: 260px 1fr 300px;
  grid-template-rows: auto 1fr;
  gap: 0;
  min-height: calc(100vh - 120px);
}

.workspace-header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-6);
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}

.workspace-title {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.workspace-title .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--safe);
  box-shadow: 0 0 6px var(--safe);
}

.image-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.workspace-actions {
  display: flex;
  gap: var(--sp-3);
}

/* ─── CONTROLS PANEL (left column) ──────────────────────────────────────── */
.controls-panel {
  grid-column: 1;
  grid-row: 2;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  padding: var(--sp-6);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.control-label {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.control-label .info-icon {
  width: 13px;
  height: 13px;
  color: var(--text-muted);
  cursor: help;
}

/* Paper type buttons */
.paper-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.paper-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-align: left;
  cursor: pointer;
}

.paper-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.paper-btn.active {
  border-color: var(--cyan);
  background: rgba(0,200,232,0.06);
  color: var(--cyan);
}

.paper-btn .paper-gain {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: inherit;
  opacity: 0.7;
}

.paper-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  line-height: 1.4;
}

/* Dot gain slider */
.slider-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.slider-row input[type='range'] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: var(--border-strong);
  border-radius: 2px;
  outline: none;
}

.slider-row input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cyan);
  cursor: pointer;
  border: 2px solid var(--bg-base);
}

.slider-row input[type='range']::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cyan);
  cursor: pointer;
  border: 2px solid var(--bg-base);
}

.slider-row input[type='range']:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: 2px;
}

.slider-value {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  min-width: 36px;
  text-align: right;
}

/* Channel toggles */
.channel-toggles {
  display: flex;
  gap: var(--sp-2);
}

.channel-toggle {
  flex: 1;
  padding: var(--sp-2) 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-raised);
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  text-align: center;
  color: var(--text-muted);
}

.channel-toggle[data-channel='c'] { color: var(--cyan); }
.channel-toggle[data-channel='m'] { color: var(--magenta); }
.channel-toggle[data-channel='y'] { color: var(--yellow); }
.channel-toggle[data-channel='k'] { color: var(--key); }

.channel-toggle.active[data-channel='c'] { background: rgba(0,200,232,0.12); border-color: var(--cyan); }
.channel-toggle.active[data-channel='m'] { background: rgba(232,25,140,0.12); border-color: var(--magenta); }
.channel-toggle.active[data-channel='y'] { background: rgba(255,218,0,0.10); border-color: var(--yellow); }
.channel-toggle.active[data-channel='k'] { background: rgba(238,238,242,0.08); border-color: var(--key); }

.channel-toggle:hover {
  border-color: var(--border-strong);
}

.channel-toggle:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* Gamut toggle */
.gamut-toggle-btn {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: left;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  cursor: pointer;
}

.gamut-toggle-btn .toggle-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-strong);
  flex-shrink: 0;
}

.gamut-toggle-btn.active {
  border-color: var(--danger);
  color: var(--danger);
}

.gamut-toggle-btn.active .toggle-dot {
  background: var(--danger);
  box-shadow: 0 0 6px var(--danger);
}

.gamut-toggle-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ─── CANVAS AREA (center column) ────────────────────────────────────────── */
.canvas-area {
  grid-column: 2;
  grid-row: 2;
  background: #080808;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#main-canvas {
  max-width: 100%;
  max-height: calc(100vh - 120px);
  object-fit: contain;
  display: block;
}

/* Split handle */
#split-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 32px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: col-resize;
  z-index: 10;
  touch-action: none;
}

#split-handle::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: rgba(255,255,255,0.8);
  transform: translateX(-50%);
}

.split-handle-grip {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.6);
  z-index: 1;
  flex-shrink: 0;
}

.split-handle-grip svg {
  width: 14px;
  height: 14px;
  color: #333;
}

#split-handle:hover .split-handle-grip,
#split-handle:focus-visible .split-handle-grip {
  background: var(--cyan);
}

#split-handle:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: 2px;
}

/* Color picker tooltip */
#color-picker-tooltip {
  position: absolute;
  z-index: 20;
  background: var(--bg-overlay);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: var(--sp-3);
  width: 180px;
  box-shadow: var(--shadow-lg);
  pointer-events: none;
}

.cp-header {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}

#cp-swatch {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.cp-label {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.cp-channels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-1) var(--sp-3);
  margin-bottom: var(--sp-2);
}

.cp-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
}

.cp-ch-label {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.cp-ch-label.c { color: var(--cyan); }
.cp-ch-label.m { color: var(--magenta); }
.cp-ch-label.y { color: var(--yellow); }
.cp-ch-label.k { color: var(--key); }

.cp-ch-val {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-primary);
}

.cp-tac {
  border-top: 1px solid var(--border);
  padding-top: var(--sp-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cp-tac-label {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.cp-tac-val {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-primary);
}

.cp-tac.over-limit .cp-tac-val { color: var(--danger); }

/* ─── RESULTS PANEL (right column) ──────────────────────────────────────── */
#results-panel {
  grid-column: 3;
  grid-row: 2;
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.results-section {
  padding: var(--sp-5) var(--sp-5);
  border-bottom: 1px solid var(--border);
}

.results-section-title {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--sp-4);
}

/* Risk badge */
.risk-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--sp-3);
}

.risk-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.risk-badge.safe    { background: rgba(26,186,142,0.15); color: var(--safe);    border: 1px solid rgba(26,186,142,0.3); }
.risk-badge.safe::before    { background: var(--safe); }
.risk-badge.caution { background: rgba(245,158,11,0.15); color: var(--caution); border: 1px solid rgba(245,158,11,0.3); }
.risk-badge.caution::before { background: var(--caution); }
.risk-badge.danger  { background: rgba(239,68,68,0.15);  color: var(--danger);  border: 1px solid rgba(239,68,68,0.3); }
.risk-badge.danger::before  { background: var(--danger); }

.risk-message {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* TAC stats */
.tac-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.tac-stat {
  background: var(--bg-raised);
  border-radius: var(--radius-sm);
  padding: var(--sp-3);
  border: 1px solid var(--border);
}

.tac-stat-label {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--sp-1);
}

.tac-stat-value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1;
}

/* TAC bar */
.tac-bar-container {
  height: 8px;
  background: var(--bg-raised);
  border-radius: 4px;
  overflow: visible;
  position: relative;
  margin-bottom: var(--sp-2);
}

.tac-bar-fill {
  height: 100%;
  border-radius: 4px;
  min-width: 2px;
}

.tac-bar-fill.safe    { background: var(--safe); }
.tac-bar-fill.caution { background: var(--caution); }
.tac-bar-fill.danger  { background: var(--danger); }

/* Ink limit marker */
.tac-limit-line {
  position: absolute;
  top: -4px;
  bottom: -4px;
  width: 2px;
  background: rgba(255,255,255,0.3);
  border-radius: 1px;
}

.tac-limit-line::after {
  content: attr(data-label);
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.tac-bar-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: var(--sp-2);
}

/* Gamut */
.gamut-stat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--sp-3) var(--sp-4);
}

.gamut-stat-label {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.gamut-stat-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-primary);
}

/* Dominant colors */
#dominant-colors {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.color-swatch {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-raised);
}

.swatch-bg {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.1);
}

.swatch-info {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

.swatch-c, .swatch-m, .swatch-y, .swatch-k {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 1px 5px;
  border-radius: 2px;
}

.swatch-c { color: var(--cyan);    background: rgba(0,200,232,0.1); }
.swatch-m { color: var(--magenta); background: rgba(232,25,140,0.1); }
.swatch-y { color: var(--yellow);  background: rgba(255,218,0,0.08); }
.swatch-k { color: var(--key);     background: rgba(238,238,242,0.06); }

/* ─── DISCLAIMER ─────────────────────────────────────────────────────────── */
.disclaimer-bar {
  padding: var(--sp-3) var(--sp-5);
  background: rgba(245,158,11,0.04);
  border-top: 1px solid rgba(245,158,11,0.12);
  margin-top: auto;
}

.disclaimer-text {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.disclaimer-text a {
  color: var(--text-secondary);
}

/* ─── PROGRESS OVERLAY ───────────────────────────────────────────────────── */
#progress-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(12,12,18,0.85);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.progress-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--sp-8) var(--sp-10);
  text-align: center;
  min-width: 280px;
  box-shadow: var(--shadow-lg);
}

.progress-steps {
  display: flex;
  justify-content: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
}

.progress-step-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.progress-step-dot.c { background: var(--cyan); }
.progress-step-dot.m { background: var(--magenta); }
.progress-step-dot.y { background: var(--yellow); }
.progress-step-dot.k { background: var(--key); }

#progress-text {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: var(--sp-4);
}

.progress-track {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.2s ease;
}

/* ─── ERROR BANNER ───────────────────────────────────────────────────────── */
#error-banner {
  position: fixed;
  bottom: var(--sp-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  background: rgba(239,68,68,0.12);
  border: 1px solid rgba(239,68,68,0.4);
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-5);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  box-shadow: var(--shadow-lg);
  max-width: 480px;
  width: calc(100vw - var(--sp-8));
 display: none !important;
}

.error-icon {
  width: 18px;
  height: 18px;
  color: var(--danger);
  flex-shrink: 0;
}

#error-message {
  font-size: 0.85rem;
  color: var(--text-primary);
  flex: 1;
}

#error-close {
  font-size: 1.2rem;
  color: var(--text-muted);
  padding: var(--sp-1);
  line-height: 1;
  cursor: pointer;
}

#error-close:hover { color: var(--text-primary); }
#error-close:focus-visible { outline: 2px solid var(--cyan); border-radius: 2px; }

/* ─── BUTTONS ────────────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-5);
  background: var(--cyan);
  color: var(--bg-base);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
}

.btn-primary:hover { background: #00dcff; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover { border-color: var(--border-strong); color: var(--text-primary); }
.btn-secondary:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.btn-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ─── FOOTER ─────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: var(--sp-6) var(--sp-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-4);
}

.footer-text {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: var(--sp-5);
  list-style: none;
}

.footer-links a {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-links a:hover { color: var(--text-primary); }

/* ─── FOCUS VISIBLE GLOBAL ───────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ─── SCROLLBAR ──────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.25); }

/* ─── RESPONSIVE ─────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  #workspace {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto;
  }

  .workspace-header { grid-column: 1; }
  .controls-panel   { grid-column: 1; grid-row: 2; border-right: none; border-bottom: 1px solid var(--border); flex-direction: row; flex-wrap: wrap; gap: var(--sp-4); }
  .canvas-area      { grid-column: 1; grid-row: 3; min-height: 50vw; }
  #results-panel    { grid-column: 1; grid-row: 4; border-left: none; border-top: 1px solid var(--border); }

  .control-group { flex: 1; min-width: 200px; }
  .channel-toggles { flex-wrap: nowrap; }
}

@media (max-width: 640px) {
  .nav { padding: var(--sp-3) var(--sp-4); }
  .nav-links { display: none; }
  #upload-section { padding: var(--sp-10) var(--sp-4) var(--sp-8); }
  .hero-title { font-size: 2rem; }
  footer { flex-direction: column; align-items: flex-start; }
}

/* ─── HIGH CONTRAST ──────────────────────────────────────────────────────── */
@media (prefers-contrast: more) {
  :root {
    --border: rgba(255,255,255,0.3);
    --border-strong: rgba(255,255,255,0.5);
    --text-secondary: #CCCCDD;
    --text-muted: #9999AA;
  }

  .paper-btn,
  .channel-toggle,
  .btn-secondary {
    border-width: 2px;
  }
}

/* ─── FIX: RESPECT HIDDEN ATTRIBUTE ─────────────────────────────────────── */
/* This fixes the loading screen freeze when JS is disabled or commented out */

#progress-overlay[hidden],
#workspace[hidden],
#results-panel[hidden] {
  display: none !important;
}