/* ==========================================================================
   ARTIFEX DECO STUDIO — 1920s ART DECO LUXURY EDITORIAL DESIGN SYSTEM
   An F&F Partners Venture | "Stop Coloring Strangers. Color Your Own World in Art Deco."
   ========================================================================== */

:root {
  /* 1. MASTER 5-COLOR ADOBE PALETTE (STRICT ENFORCEMENT) */
  --obsidian-ink: #181B20;       /* RGB(24, 27, 32)  — Primary Anchor: Deep charcoal-black */
  --imperial-emerald: #0F4C45;   /* RGB(15, 76, 69)  — Secondary Support: 1920s leaded-glass malachite */
  --gilded-sunburst: #D4AF37;    /* RGB(212, 175, 55) — Primary Accent / CTA: Metallic antique brass/gold */
  --royal-amethyst: #6E2E53;     /* RGB(110, 46, 83) — Warm Counterbalance: Deep jewel tone */
  --artist-vellum: #FAF6EE;      /* RGB(250, 246, 238) — High-Legibility Canvas: 100lb heavyweight cardstock */

  /* Palette Tonal Utilities & Gold Foil Gradients */
  --gold-foil-gradient: linear-gradient(135deg, #C59B27 0%, #F3E5AB 50%, #D4AF37 100%);
  --gold-foil-hover: linear-gradient(135deg, #D4AF37 0%, #FFF4C8 48%, #B88D1E 100%);
  --emerald-deep-gradient: linear-gradient(165deg, #0F4C45 0%, #09322D 100%);
  --obsidian-panel: rgba(24, 27, 32, 0.96);
  --vellum-elevated: #F3EDE0;
  --vellum-card: #FDFBF7;
  --gilded-line: rgba(212, 175, 55, 0.52);
  --gilded-line-strong: rgba(212, 175, 55, 0.92);
  --amethyst-glow: rgba(110, 46, 83, 0.24);
  --ink-muted: rgba(24, 27, 32, 0.72);
  --ink-subtle: rgba(24, 27, 32, 0.14);

  /* 2. TYPOGRAPHY HIERARCHY */
  --font-display: 'Cinzel', 'Marcellus', serif;
  --font-editorial: 'Marcellus', 'Cinzel', serif;
  --font-ui: 'Montserrat', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;

  /* 3. BESPOKE ART DECO MICRO-ARCHITECTURE & MOTION */
  --ease-deco: 300ms cubic-bezier(0.22, 1, 0.36, 1);
  --chamfer-sm: polygon(
    8px 0%, calc(100% - 8px) 0%, 100% 8px,
    100% calc(100% - 8px), calc(100% - 8px) 100%,
    8px 100%, 0% calc(100% - 8px), 0% 8px
  );
  --chamfer-md: polygon(
    14px 0%, calc(100% - 14px) 0%, 100% 14px,
    100% calc(100% - 14px), calc(100% - 14px) 100%,
    14px 100%, 0% calc(100% - 14px), 0% 14px
  );
  --chamfer-stepped: polygon(
    0% 12px, 12px 12px, 12px 0%,
    calc(100% - 12px) 0%, calc(100% - 12px) 12px, 100% 12px,
    100% calc(100% - 12px), calc(100% - 12px) calc(100% - 12px), calc(100% - 12px) 100%,
    12px 100%, 12px calc(100% - 12px), 0% calc(100% - 12px)
  );
}

/* ==========================================================================
   BASE RESET & HEAVYWEIGHT ARTIST VELLUM CANVAS
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* Strict prohibition of generic rounded boxes */
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--artist-vellum);
  color: var(--obsidian-ink);
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--obsidian-ink);
  background-color: var(--artist-vellum);
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Tactile 100lb Heavyweight Cardstock Paper Grain Overlay */
.vellum-grain-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.038;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 240 240' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Ornamental Page Outer Border Pin-striping */
.architectural-page-border {
  position: fixed;
  inset: 10px;
  border: 1px solid rgba(212, 175, 55, 0.35);
  pointer-events: none;
  z-index: 900;
}
.architectural-page-border::after {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(24, 27, 32, 0.08);
}

/* Typography Standards */
h1, h2, h3, h4, .display-heading {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.18;
  text-transform: uppercase;
}

.ui-label {
  font-family: var(--font-ui);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
}

.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ==========================================================================
   BESPOKE ART DECO BUTTONS & INTERACTIVE CONTROLS
   ========================================================================== */
.btn-gold-foil {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--obsidian-ink);
  background: var(--gold-foil-gradient);
  border: 1px solid var(--obsidian-ink);
  padding: 1rem 2.1rem;
  cursor: pointer;
  clip-path: var(--chamfer-sm);
  box-shadow: 0 6px 20px rgba(24, 27, 32, 0.18), inset 0 0 0 2px rgba(24, 27, 32, 0.25);
  transition: transform var(--ease-deco), box-shadow var(--ease-deco), filter var(--ease-deco);
  text-decoration: none;
  user-select: none;
}

.btn-gold-foil::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(24, 27, 32, 0.45);
  pointer-events: none;
  clip-path: var(--chamfer-sm);
}

.btn-gold-foil:hover:not(:disabled) {
  background: var(--gold-foil-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(212, 175, 55, 0.35), 0 4px 12px rgba(24, 27, 32, 0.25);
}

.btn-gold-foil:active:not(:disabled) {
  transform: translateY(0);
}

.btn-gold-foil:disabled {
  opacity: 0.48;
  cursor: not-allowed;
  filter: grayscale(0.45);
}

.btn-deco-outline {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gilded-sunburst);
  background: var(--obsidian-ink);
  border: 1px solid var(--gilded-sunburst);
  padding: 0.88rem 1.65rem;
  cursor: pointer;
  clip-path: var(--chamfer-sm);
  transition: all var(--ease-deco);
  text-decoration: none;
}

.btn-deco-outline::before {
  content: '';
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(212, 175, 55, 0.35);
  pointer-events: none;
}

.btn-deco-outline:hover:not(:disabled) {
  background: var(--imperial-emerald);
  color: var(--artist-vellum);
  border-color: var(--gilded-sunburst);
  box-shadow: 0 6px 20px rgba(15, 76, 69, 0.32);
  transform: translateY(-2px);
}

.btn-deco-outline:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-amethyst-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background-color: var(--royal-amethyst);
  color: var(--artist-vellum);
  border: 1px solid var(--gilded-sunburst);
  padding: 0.38rem 0.95rem;
  clip-path: var(--chamfer-sm);
  box-shadow: 0 2px 10px var(--amethyst-glow);
}

/* ==========================================================================
   TOP NAVIGATION ATELIER BAR
   ========================================================================== */
.atelier-navbar {
  position: sticky;
  top: 0;
  z-index: 800;
  background-color: var(--obsidian-ink);
  color: var(--artist-vellum);
  border-bottom: 2px solid var(--gilded-sunburst);
  box-shadow: 0 8px 28px rgba(24, 27, 32, 0.28);
}

.atelier-navbar::after {
  content: '';
  display: block;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--gilded-sunburst) 0px,
    var(--gilded-sunburst) 16px,
    var(--obsidian-ink) 16px,
    var(--obsidian-ink) 24px
  );
  opacity: 0.45;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
  gap: 1.5rem;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
  color: var(--artist-vellum);
}

.brand-crest-svg {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.brand-titles {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.22rem;
  letter-spacing: 0.08em;
  color: var(--gilded-sunburst);
  line-height: 1.1;
}

.brand-venture {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: rgba(250, 246, 238, 0.72);
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--artist-vellum);
  text-decoration: none;
  padding: 0.4rem 0;
  position: relative;
  transition: color var(--ease-deco);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--gilded-sunburst);
  transform: scaleX(0);
  transition: transform var(--ease-deco);
}

.nav-link:hover,
.nav-link.active {
  color: var(--gilded-sunburst);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

/* ==========================================================================
   SECTION 1: HERO & INTERACTIVE "BEFORE / AFTER" SHOWCASE
   ========================================================================== */
.hero-section {
  position: relative;
  background: var(--emerald-deep-gradient);
  color: var(--artist-vellum);
  padding: 3.75rem 0 4.5rem;
  border-bottom: 3px solid var(--gilded-sunburst);
  overflow: hidden;
}

/* Architectural Sunburst Background Watermark in Hero */
.hero-sunburst-bg {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 1400px;
  height: 750px;
  pointer-events: none;
  opacity: 0.12;
  z-index: 0;
}

.hero-content-wrapper {
  position: relative;
  z-index: 2;
}

.hero-editorial-header {
  text-align: center;
  max-width: 960px;
  margin: 0 auto 2.75rem;
}

.hero-kicker-row {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.1rem;
  padding: 0.4rem 1.2rem;
  background: rgba(24, 27, 32, 0.65);
  border: 1px solid var(--gilded-sunburst);
  clip-path: var(--chamfer-sm);
}

.kicker-diamond {
  width: 8px;
  height: 8px;
  background: var(--gilded-sunburst);
  transform: rotate(45deg);
}

.hero-headline {
  font-size: clamp(2rem, 4.1vw, 3.45rem);
  color: var(--artist-vellum);
  margin-bottom: 1.15rem;
  text-shadow: 0 4px 24px rgba(24, 27, 32, 0.55);
}

.hero-headline .gold-accent {
  background: var(--gold-foil-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subheadline {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 400;
  color: rgba(250, 246, 238, 0.9);
  max-width: 780px;
  margin: 0 auto 1.75rem;
  line-height: 1.68;
}

.hero-trust-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.25rem;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: rgba(24, 27, 32, 0.72);
  border: 1px solid rgba(212, 175, 55, 0.6);
  padding: 0.45rem 1rem;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--artist-vellum);
  clip-path: var(--chamfer-sm);
}

.trust-badge svg {
  color: var(--gilded-sunburst);
  flex-shrink: 0;
}

/* 3-Tab Interactive Showcase Navigation */
.showcase-tabs-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  max-width: 1080px;
  margin: 0 auto 2rem;
}

.showcase-tab-btn {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  padding: 1.1rem 1.35rem;
  background: rgba(24, 27, 32, 0.78);
  border: 1px solid rgba(212, 175, 55, 0.42);
  color: var(--artist-vellum);
  cursor: pointer;
  clip-path: var(--chamfer-md);
  transition: all var(--ease-deco);
}

.showcase-tab-btn::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(212, 175, 55, 0.18);
  pointer-events: none;
  transition: border-color var(--ease-deco);
}

.showcase-tab-btn:hover {
  border-color: var(--gilded-sunburst);
  background: rgba(24, 27, 32, 0.92);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--amethyst-glow);
}

.showcase-tab-btn.active {
  background: var(--obsidian-ink);
  border: 2px solid var(--gilded-sunburst);
  box-shadow: 0 10px 30px rgba(24, 27, 32, 0.5), 0 0 24px rgba(110, 46, 83, 0.55);
}

.showcase-tab-btn.active::before {
  border-color: rgba(212, 175, 55, 0.65);
}

.tab-pill-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-bottom: 0.45rem;
}

.category-pill {
  font-family: var(--font-ui);
  font-size: 0.64rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.22rem 0.65rem;
  background: var(--royal-amethyst);
  color: var(--artist-vellum);
  border: 1px solid var(--gilded-sunburst);
  clip-path: var(--chamfer-sm);
}

.tab-title {
  font-family: var(--font-display);
  font-size: 0.96rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gilded-sunburst);
  margin-bottom: 0.2rem;
}

.tab-subtitle {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: rgba(250, 246, 238, 0.76);
}

/* Interactive Split-Screen Before / After Showcase Stage */
.showcase-stage-frame {
  position: relative;
  max-width: 1140px;
  margin: 0 auto;
  background: var(--obsidian-ink);
  border: 2px solid var(--gilded-sunburst);
  padding: 1.5rem;
  clip-path: var(--chamfer-stepped);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.48);
}

.showcase-stage-frame::before {
  content: '';
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(212, 175, 55, 0.42);
  pointer-events: none;
}

.showcase-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: center;
}

/* Interactive Split-Screen Slider Component */
.split-slider-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  max-height: 640px;
  margin: 0 auto;
  overflow: hidden;
  border: 2px solid var(--gilded-sunburst);
  outline: 1px solid rgba(212, 175, 55, 0.45);
  outline-offset: -6px;
  background: var(--artist-vellum);
  user-select: none;
  cursor: ew-resize;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.55);
}

/* Right Layer (Base): Crisp 1920s Art Deco Coloring Page on Vellum + Alcohol Markers Desk Staging */
.split-layer-after {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 82% 16%, rgba(212, 175, 55, 0.2), transparent 48%),
    radial-gradient(circle at 18% 85%, rgba(15, 76, 69, 0.35), transparent 55%),
    repeating-linear-gradient(
      45deg,
      #181B20 0px,
      #181B20 14px,
      #1D2128 14px,
      #1D2128 28px
    );
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 2.2rem 3.8rem 1.5rem;
}

/* Realistic 8.5 x 11 Vellum Sheet on Studio Desk surrounded by Alcohol Markers */
.vellum-print-sheet {
  position: relative;
  width: 88%;
  height: 96%;
  background: var(--artist-vellum);
  box-shadow:
    0 18px 42px rgba(0, 0, 0, 0.78),
    0 0 0 1px rgba(212, 175, 55, 0.65),
    inset 0 0 0 6px #FFFFFF;
  padding: 3.2%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vellum-print-sheet::after {
  content: '8.5" × 11" US LETTER • 0.3" MARGIN • ZERO SOLID FILLS';
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-ui);
  font-size: 0.5rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(24, 27, 32, 0.55);
  white-space: nowrap;
}

.vellum-print-sheet img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  filter: contrast(1.08);
}

/* Staged Alcohol Markers & Brass Ruler Props alongside the 8.5x11 sheet */
.marker-prop {
  position: absolute;
  z-index: 4;
  pointer-events: none;
  filter: drop-shadow(0 10px 16px rgba(0, 0, 0, 0.75));
}

.marker-prop-right-1 {
  right: 6px;
  bottom: 54px;
  width: 24px;
  height: 185px;
  transform: rotate(-15deg);
}

.marker-prop-right-2 {
  right: 26px;
  bottom: 42px;
  width: 24px;
  height: 172px;
  transform: rotate(-6deg);
}

.marker-prop-right-3 {
  right: 46px;
  bottom: 30px;
  width: 24px;
  height: 158px;
  transform: rotate(3deg);
}

/* Left Layer (Clipped by Slider): Raw Everyday Smartphone Photo */
.split-layer-before {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  clip-path: inset(0 50% 0 0);
  background: radial-gradient(circle at center, #262A32 0%, #181B20 100%);
}

.split-layer-before img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.split-layer-before.landscape-fit img,
.split-layer-before.landscape-fit .free-filter-muddy-overlay img {
  object-fit: contain;
  padding: 0.75rem;
}

/* Plate I (Couples): Size down full vertical smartphone photo so the whole picture fits
   in the frame and the humans match the exact scale & position of the Art Deco line art */
.split-layer-before.couples-scale-match img,
.split-layer-before.couples-scale-match .free-filter-muddy-overlay img {
  object-fit: contain;
  padding: 15.5% 16.5% 15.5% 14.5%;
  filter: drop-shadow(0 12px 28px rgba(0, 0, 0, 0.65));
}

.split-layer-before.couples-scale-match .free-filter-muddy-overlay img {
  filter: grayscale(100%) contrast(420%) brightness(72%) blur(0.6px) drop-shadow(0 12px 28px rgba(0, 0, 0, 0.65));
}

/* Optional Free-Filter Failure Overlay Mode inside Before Layer when toggled/hovered */
.free-filter-muddy-overlay {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--ease-deco);
  background: #8B8E92;
}

.free-filter-muddy-overlay.visible {
  opacity: 1;
}

.free-filter-muddy-overlay img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* Simulates terrible free filter app: high-contrast muddy threshold + creepy dark eye/shadow blobs */
  filter: grayscale(100%) contrast(420%) brightness(72%) blur(0.6px);
}

/* Corner Labels inside Split Comparison */
.split-corner-badge {
  position: absolute;
  top: 14px;
  z-index: 10;
  padding: 0.38rem 0.85rem;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  clip-path: var(--chamfer-sm);
  pointer-events: none;
}

.split-badge-left {
  left: 14px;
  background: rgba(24, 27, 32, 0.88);
  color: var(--artist-vellum);
  border: 1px solid rgba(250, 246, 238, 0.35);
}

.split-badge-right {
  right: 14px;
  background: var(--obsidian-ink);
  color: var(--gilded-sunburst);
  border: 1px solid var(--gilded-sunburst);
}

/* Split Slider Divider Line & Handle */
.split-divider-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  background: var(--gilded-sunburst);
  box-shadow: 0 0 14px rgba(0, 0, 0, 0.85);
  z-index: 15;
  pointer-events: none;
}

.split-handle-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
  width: 44px;
  height: 44px;
  background: var(--gold-foil-gradient);
  border: 2px solid var(--obsidian-ink);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 16;
  pointer-events: none;
}

.split-handle-knob svg {
  transform: rotate(-45deg);
  color: var(--obsidian-ink);
}

/* Middle Callout Badge: "Why Free Filter Apps Fail" */
.middle-callout-badge {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  width: min(92%, 370px);
  background: rgba(24, 27, 32, 0.95);
  border: 1px solid var(--gilded-sunburst);
  border-left: 4px solid var(--royal-amethyst);
  padding: 0.7rem 0.95rem;
  clip-path: var(--chamfer-sm);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.muddy-swatch-thumb {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border: 1px solid var(--gilded-sunburst);
  position: relative;
  overflow: hidden;
  background: #555;
}

.muddy-swatch-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(480%) brightness(62%);
}

.muddy-swatch-x {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(110, 46, 83, 0.48);
  color: #FAF6EE;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 0.65rem;
}

.callout-copy {
  flex: 1;
}

.callout-title {
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gilded-sunburst);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.15rem;
}

.callout-desc {
  font-size: 0.72rem;
  color: rgba(250, 246, 238, 0.85);
  line-height: 1.35;
}

.btn-inspect-failure {
  background: var(--royal-amethyst);
  color: var(--artist-vellum);
  border: 1px solid var(--gilded-sunburst);
  font-family: var(--font-ui);
  font-size: 0.58rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.18rem 0.45rem;
  cursor: pointer;
}

.btn-inspect-failure:hover,
.btn-inspect-failure.active {
  background: var(--gilded-sunburst);
  color: var(--obsidian-ink);
}

/* Showcase Right Column Editorial Details */
.showcase-editorial-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 0.5rem 0.5rem 0.5rem 0;
}

.showcase-panel-title {
  font-size: 1.65rem;
  color: var(--gilded-sunburst);
}

.showcase-panel-quote {
  font-family: var(--font-editorial);
  font-size: 1.04rem;
  color: var(--artist-vellum);
  border-left: 3px solid var(--gilded-sunburst);
  padding-left: 1rem;
  line-height: 1.55;
}

.showcase-spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.showcase-spec-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: rgba(250, 246, 238, 0.04);
  border: 1px solid rgba(212, 175, 55, 0.25);
  padding: 0.75rem 1rem;
  clip-path: var(--chamfer-sm);
}

.spec-diamond-bullet {
  width: 10px;
  height: 10px;
  background: var(--gilded-sunburst);
  transform: rotate(45deg);
  margin-top: 6px;
  flex-shrink: 0;
}

.spec-item-title {
  font-family: var(--font-ui);
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gilded-sunburst);
  margin-bottom: 0.15rem;
}

.spec-item-text {
  font-size: 0.84rem;
  color: rgba(250, 246, 238, 0.84);
}

.showcase-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 0.5rem;
}

/* ==========================================================================
   ART DECO GEOMETRIC SECTION DIVIDER
   ========================================================================== */
.deco-section-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin: 3rem auto;
  max-width: 680px;
}

.deco-divider-line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gilded-sunburst), var(--obsidian-ink));
}

.deco-divider-line.right {
  background: linear-gradient(90deg, var(--obsidian-ink), var(--gilded-sunburst), transparent);
}

/* ==========================================================================
   SECTION 2: THE 4-STEP STUDIO CREATION WORKSPACE (STATE MACHINE)
   ========================================================================== */
.studio-workspace-section {
  padding: 4.5rem 0 5rem;
  background-color: var(--artist-vellum);
  position: relative;
}

.section-header-center {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 2.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.2vw, 2.65rem);
  color: var(--obsidian-ink);
  margin: 0.5rem 0 0.85rem;
}

.section-subtitle {
  font-size: 1.02rem;
  color: var(--ink-muted);
}

/* 4-Step Deterministic State Machine Stepper Bar */
.state-machine-stepper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  max-width: 1140px;
  margin: 0 auto 2.25rem;
}

.step-node {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.95rem 1.15rem;
  background: var(--vellum-elevated);
  border: 1px solid rgba(24, 27, 32, 0.28);
  clip-path: var(--chamfer-sm);
  transition: all var(--ease-deco);
  cursor: pointer;
}

.step-node:hover:not(.active) {
  border-color: var(--gilded-sunburst);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(24, 27, 32, 0.1);
}

.step-node.active {
  background: var(--obsidian-ink);
  color: var(--artist-vellum);
  border: 2px solid var(--gilded-sunburst);
  box-shadow: 0 8px 24px rgba(24, 27, 32, 0.22);
}

.step-node.completed {
  background: var(--imperial-emerald);
  color: var(--artist-vellum);
  border: 1px solid var(--gilded-sunburst);
}

.step-number-diamond {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--artist-vellum);
  color: var(--obsidian-ink);
  border: 1px solid var(--obsidian-ink);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  flex-shrink: 0;
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.step-node.active .step-number-diamond {
  background: var(--gold-foil-gradient);
  color: var(--obsidian-ink);
  border-color: var(--gilded-sunburst);
}

.step-node.completed .step-number-diamond {
  background: var(--gilded-sunburst);
  color: var(--obsidian-ink);
}

.step-meta {
  display: flex;
  flex-direction: column;
}

.step-state-code {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  opacity: 0.72;
}

.step-node.active .step-state-code {
  color: var(--gilded-sunburst);
  opacity: 1;
}

.step-label-title {
  font-family: var(--font-ui);
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Main Studio Architectural Stage Container */
.studio-stage-vault {
  position: relative;
  max-width: 1140px;
  margin: 0 auto;
  background: var(--vellum-card);
  border: 2px solid var(--obsidian-ink);
  box-shadow:
    0 20px 50px rgba(24, 27, 32, 0.12),
    inset 0 0 0 6px var(--artist-vellum),
    inset 0 0 0 8px var(--gilded-sunburst);
  padding: 2.75rem 2.5rem;
  min-height: 540px;
}

/* Corner SVG Ornaments for Studio Stage */
.stage-corner-ornament {
  position: absolute;
  width: 42px;
  height: 42px;
  pointer-events: none;
  z-index: 5;
}
.stage-corner-tl { top: 10px; left: 10px; }
.stage-corner-tr { top: 10px; right: 10px; transform: scaleX(-1); }
.stage-corner-bl { bottom: 10px; left: 10px; transform: scaleY(-1); }
.stage-corner-br { bottom: 10px; right: 10px; transform: scale(-1, -1); }

/* State View Panels */
.studio-state-panel {
  display: none;
  animation: decoReveal 360ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.studio-state-panel.active {
  display: block;
}

@keyframes decoReveal {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   STATE 1: PHOTO UPLOAD & INTAKE (UPLOAD_READY)
   -------------------------------------------------------------------------- */
.upload-intake-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 2.25rem;
  align-items: stretch;
}

.gilded-dropzone {
  position: relative;
  background:
    radial-gradient(circle at center, rgba(212, 175, 55, 0.1) 0%, transparent 72%),
    var(--artist-vellum);
  border: 2px solid var(--gilded-sunburst);
  outline: 1px solid var(--obsidian-ink);
  outline-offset: -8px;
  padding: 2.25rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: all var(--ease-deco);
  min-height: 420px;
  clip-path: var(--chamfer-md);
}

.gilded-dropzone::before {
  content: '◆ UPLOAD YOUR PHOTO • FITS STANDARD 8.5" × 11" PAPER ◆';
  font-family: var(--font-ui);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--obsidian-ink);
  background: var(--gold-foil-gradient);
  padding: 0.28rem 1rem;
  border: 1px solid var(--obsidian-ink);
  margin-bottom: 1.15rem;
  clip-path: var(--chamfer-sm);
}

.gilded-dropzone:hover,
.gilded-dropzone.dragover {
  background:
    radial-gradient(circle at center, rgba(212, 175, 55, 0.2) 0%, transparent 74%),
    var(--vellum-elevated);
  border-color: var(--imperial-emerald);
  box-shadow: 0 14px 36px rgba(15, 76, 69, 0.16);
}

.dropzone-medallion {
  width: 64px;
  height: 64px;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--obsidian-ink);
  border: 2px solid var(--gilded-sunburst);
  color: var(--gilded-sunburst);
  clip-path: polygon(25% 0%, 75% 0%, 100% 25%, 100% 75%, 75% 100%, 25% 100%, 0% 75%, 0% 25%);
}

.dropzone-title {
  font-family: var(--font-display);
  font-size: 1.28rem;
  color: var(--obsidian-ink);
  margin-bottom: 0.4rem;
}

.dropzone-subtitle {
  font-size: 0.88rem;
  color: var(--ink-muted);
  max-width: 440px;
  margin-bottom: 1rem;
}

.format-pills-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.55rem;
  margin-bottom: 1.1rem;
}

.format-pill {
  font-family: var(--font-ui);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0.24rem 0.68rem;
  background: var(--obsidian-ink);
  color: var(--gilded-sunburst);
  border: 1px solid var(--gilded-sunburst);
}

/* Uploaded Photo Preview Card inside Dropzone */
.uploaded-photo-preview-box {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  width: 100%;
  max-width: 520px;
  padding: 0.85rem 1.1rem;
  background: var(--obsidian-ink);
  color: var(--artist-vellum);
  border: 1px solid var(--gilded-sunburst);
  clip-path: var(--chamfer-sm);
  margin-bottom: 1.15rem;
  text-align: left;
}

.uploaded-photo-preview-box.visible {
  display: flex;
}

.uploaded-thumb-frame {
  position: relative;
  width: 78px;
  height: 102px;
  border: 2px solid var(--gilded-sunburst);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
  padding: 3px;
  background: #FFFFFF;
  flex-shrink: 0;
}

.uploaded-thumb-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.uploaded-file-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--gilded-sunburst);
  line-height: 1.45;
}

/* Quick Sample Preset Selector Strip */
.sample-presets-bar {
  margin-top: 1.25rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(24, 27, 32, 0.14);
  width: 100%;
}

.sample-presets-label {
  font-family: var(--font-ui);
  font-size: 0.66rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  margin-bottom: 0.65rem;
  display: block;
}

.sample-preset-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.btn-sample-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.8rem;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--vellum-elevated);
  color: var(--obsidian-ink);
  border: 1px solid var(--obsidian-ink);
  cursor: pointer;
  clip-path: var(--chamfer-sm);
  transition: all var(--ease-deco);
}

.btn-sample-chip:hover,
.btn-sample-chip.selected {
  background: var(--royal-amethyst);
  color: var(--artist-vellum);
  border-color: var(--gilded-sunburst);
}

/* Right Column: Studio Curator Tips & Transform CTA */
.curator-tips-card {
  background: var(--obsidian-ink);
  color: var(--artist-vellum);
  border: 2px solid var(--gilded-sunburst);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  clip-path: var(--chamfer-md);
}

.curator-tips-header {
  border-bottom: 1px solid rgba(212, 175, 55, 0.35);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}

.curator-tips-title {
  font-size: 1.15rem;
  color: var(--gilded-sunburst);
  margin-top: 0.3rem;
}

.tips-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.tips-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.86rem;
  color: rgba(250, 246, 238, 0.88);
}

.tip-icon-box {
  width: 24px;
  height: 24px;
  background: var(--imperial-emerald);
  border: 1px solid var(--gilded-sunburst);
  color: var(--gilded-sunburst);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: 0.75rem;
}

.transform-action-box {
  background: rgba(250, 246, 238, 0.05);
  border: 1px solid rgba(212, 175, 55, 0.35);
  padding: 1.25rem;
  text-align: center;
}

.transform-action-box .btn-gold-foil {
  width: 100%;
  font-size: 0.9rem;
  padding: 1.15rem 1.5rem;
}

/* --------------------------------------------------------------------------
   STATE 2: THE HIDDEN TWO-STAGE ALCHEMY (PROCESSING_PIPELINE)
   -------------------------------------------------------------------------- */
.alchemy-loader-stage {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.sunburst-spinner-vault {
  position: relative;
  width: 168px;
  height: 168px;
  margin: 0 auto 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sunburst-ring-outer {
  position: absolute;
  inset: 0;
  animation: rotateDecoClockwise 14s linear infinite;
}

.sunburst-ring-inner {
  position: absolute;
  inset: 22px;
  animation: rotateDecoCounter 9s linear infinite;
}

.sunburst-core-diamond {
  position: relative;
  z-index: 3;
  width: 64px;
  height: 64px;
  background: var(--obsidian-ink);
  border: 2px solid var(--gilded-sunburst);
  color: var(--gilded-sunburst);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

@keyframes rotateDecoClockwise {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes rotateDecoCounter {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

.alchemy-active-status {
  font-family: var(--font-display);
  font-size: 1.45rem;
  color: var(--obsidian-ink);
  margin-bottom: 0.65rem;
  min-height: 2.2rem;
}

.alchemy-sub-telemetry {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  color: var(--imperial-emerald);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
}

/* Art Deco Stepped Progress Bar */
.deco-progress-track {
  width: 100%;
  height: 18px;
  background: var(--obsidian-ink);
  border: 2px solid var(--gilded-sunburst);
  padding: 2px;
  margin-bottom: 2rem;
  clip-path: var(--chamfer-sm);
}

.deco-progress-fill {
  height: 100%;
  width: 18%;
  background: var(--gold-foil-gradient);
  transition: width 450ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* 3 Progressive Stage Checklist Cards */
.alchemy-steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  text-align: left;
  margin-bottom: 1.75rem;
}

.alchemy-step-card {
  padding: 1rem;
  background: var(--vellum-elevated);
  border: 1px solid rgba(24, 27, 32, 0.2);
  clip-path: var(--chamfer-sm);
  opacity: 0.55;
  transition: all var(--ease-deco);
}

.alchemy-step-card.active {
  opacity: 1;
  background: var(--obsidian-ink);
  color: var(--artist-vellum);
  border: 1px solid var(--gilded-sunburst);
  box-shadow: 0 8px 20px rgba(24, 27, 32, 0.2);
}

.alchemy-step-card.done {
  opacity: 1;
  background: rgba(15, 76, 69, 0.12);
  border: 1px solid var(--imperial-emerald);
}

.alchemy-step-num {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gilded-sunburst);
  margin-bottom: 0.35rem;
  display: block;
}

.alchemy-step-card.done .alchemy-step-num {
  color: var(--imperial-emerald);
}

.alchemy-step-text {
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1.4;
}

/* Security Notice confirming Step 1 Color Intermediate is strictly isolated */
.pipeline-isolation-banner {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background: rgba(15, 76, 69, 0.1);
  border: 1px solid var(--imperial-emerald);
  color: var(--imperial-emerald);
  padding: 0.55rem 1.15rem;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   STATE 3: WATERMARKED 3-OPTION SELECTION CAROUSEL (PREVIEW_SELECTION)
   -------------------------------------------------------------------------- */
.preview-selection-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid rgba(24, 27, 32, 0.15);
}

.preview-trio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.variation-card {
  position: relative;
  background: var(--artist-vellum);
  border: 2px solid rgba(24, 27, 32, 0.3);
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: all var(--ease-deco);
  clip-path: var(--chamfer-md);
}

.variation-card:hover {
  border-color: var(--gilded-sunburst);
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(24, 27, 32, 0.14);
}

.variation-card.selected {
  background: var(--obsidian-ink);
  color: var(--artist-vellum);
  border: 2px solid var(--gilded-sunburst);
  box-shadow: 0 18px 40px rgba(24, 27, 32, 0.28), 0 0 0 3px rgba(212, 175, 55, 0.35);
}

.variation-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.variation-code-tag {
  font-family: var(--font-ui);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  background: var(--imperial-emerald);
  color: var(--artist-vellum);
  border: 1px solid var(--gilded-sunburst);
}

.variation-select-indicator {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.variation-card.selected .variation-select-indicator {
  color: var(--gilded-sunburst);
}

/* Ornate 72 DPI Watermarked Preview Canvas Container (Right-Click Protected) */
.protected-preview-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 8.5 / 11;
  background: #FFFFFF;
  border: 2px solid var(--gilded-sunburst);
  overflow: hidden;
  margin-bottom: 1rem;
  user-select: none;
  -webkit-user-drag: none;
}

.protected-preview-viewport img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  pointer-events: none;
  user-select: none;
}

/* Repeating Diagonal SVG Watermark Overlay ("ARTIFEX COLORING STUDIO • PREVIEW") */
.svg-watermark-overlay {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='280' height='180' viewBox='0 0 280 180'%3E%3Cg transform='rotate(-32 140 90)'%3E%3Ctext x='10' y='85' fill='rgba(24,27,32,0.16)' font-family='Montserrat, sans-serif' font-weight='700' font-size='11' letter-spacing='2'%3EARTIFEX COLORING STUDIO %E2%80%A2 PREVIEW%3C/text%3E%3Ctext x='25' y='105' fill='rgba(212,175,55,0.22)' font-family='Cinzel, serif' font-weight='600' font-size='9' letter-spacing='3'%3EPREVIEW ONLY %E2%80%A2 UNLOCK TO PRINT%3C/text%3E%3C/g%3E%3C/svg%3E");
  background-repeat: repeat;
}

.dpi-lock-pill {
  position: absolute;
  bottom: 8px;
  right: 8px;
  z-index: 5;
  background: rgba(24, 27, 32, 0.88);
  color: var(--gilded-sunburst);
  border: 1px solid var(--gilded-sunburst);
  padding: 0.2rem 0.55rem;
  font-family: var(--font-ui);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.variation-name {
  font-family: var(--font-display);
  font-size: 0.98rem;
  margin-bottom: 0.3rem;
}

.variation-card.selected .variation-name {
  color: var(--gilded-sunburst);
}

.variation-desc {
  font-size: 0.78rem;
  line-height: 1.45;
  opacity: 0.82;
  margin-bottom: 0.9rem;
  flex: 1;
}

.variation-card-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-loupe-inspect {
  width: 100%;
  padding: 0.55rem;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: transparent;
  border: 1px solid currentColor;
  color: inherit;
  cursor: pointer;
  transition: all var(--ease-deco);
}

.variation-card.selected .btn-loupe-inspect {
  background: var(--gold-foil-gradient);
  color: var(--obsidian-ink);
  border-color: var(--gilded-sunburst);
}

/* Selection & Retry Action Bar */
.preview-controls-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.35rem 1.5rem;
  background: var(--vellum-elevated);
  border: 1px solid var(--obsidian-ink);
  clip-path: var(--chamfer-sm);
}

.retry-control-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.retry-economics-note {
  font-size: 0.75rem;
  color: var(--ink-muted);
}

/* --------------------------------------------------------------------------
   STATE 4: TIERED CHECKOUT & 300 DPI PRINT EXPORT (CHECKOUT_UNLOCK)
   -------------------------------------------------------------------------- */
.checkout-pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.25rem;
  align-items: stretch;
}

.pricing-tier-card {
  position: relative;
  background: var(--artist-vellum);
  border: 2px solid var(--obsidian-ink);
  padding: 2rem 1.6rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: all var(--ease-deco);
  clip-path: var(--chamfer-md);
}

.pricing-tier-card:hover {
  border-color: var(--gilded-sunburst);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(24, 27, 32, 0.14);
}

.pricing-tier-card.featured-popular {
  background: var(--obsidian-ink);
  color: var(--artist-vellum);
  border: 2px solid var(--gilded-sunburst);
  box-shadow: 0 24px 52px rgba(110, 46, 83, 0.36), inset 0 0 0 4px rgba(212, 175, 55, 0.25);
  transform: translateY(-8px);
}

.pricing-tier-card.featured-popular:hover {
  transform: translateY(-11px);
}

.pricing-tier-card.selected-tier {
  outline: 3px solid var(--gilded-sunburst);
  outline-offset: 3px;
}

.tier-ribbon-badge {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.28rem 0.8rem;
  margin-bottom: 0.85rem;
  clip-path: var(--chamfer-sm);
}

/* Most Popular Badge strictly in --royal-amethyst (#6E2E53) */
.tier-ribbon-popular {
  background-color: var(--royal-amethyst);
  color: var(--artist-vellum);
  border: 1px solid var(--gilded-sunburst);
  box-shadow: 0 4px 16px rgba(110, 46, 83, 0.65);
}

.tier-ribbon-value {
  background-color: var(--imperial-emerald);
  color: var(--artist-vellum);
  border: 1px solid var(--gilded-sunburst);
}

.tier-ribbon-standard {
  background-color: var(--vellum-elevated);
  color: var(--obsidian-ink);
  border: 1px solid var(--obsidian-ink);
}

.tier-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.pricing-tier-card.featured-popular .tier-title {
  color: var(--gilded-sunburst);
}

.tier-price-row {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
}

.tier-price-amount {
  font-family: var(--font-display);
  font-size: 2.35rem;
  font-weight: 600;
}

.pricing-tier-card.featured-popular .tier-price-amount {
  color: var(--gilded-sunburst);
}

.tier-price-note {
  font-family: var(--font-ui);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.75;
}

.tier-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1.65rem;
  font-size: 0.84rem;
}

.tier-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
}

.tier-check-diamond {
  width: 8px;
  height: 8px;
  background: var(--gilded-sunburst);
  transform: rotate(45deg);
  margin-top: 6px;
  flex-shrink: 0;
}

/* Unlocked 300 DPI Print Master Export Vault */
.print-export-vault {
  background: var(--emerald-deep-gradient);
  color: var(--artist-vellum);
  border: 2px solid var(--gilded-sunburst);
  padding: 2rem;
  clip-path: var(--chamfer-md);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.print-vault-locked-overlay {
  opacity: 0.88;
}

.print-spec-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.65rem;
}

.print-spec-tag {
  font-family: var(--font-ui);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  background: rgba(24, 27, 32, 0.72);
  border: 1px solid var(--gilded-sunburst);
  color: var(--gilded-sunburst);
}

/* ==========================================================================
   SECTION 3: ARCHITECTURAL PIPELINE & 300 DPI PRINT SPECIFICATION INSPECTOR
   ========================================================================== */
.architecture-spec-section {
  background: var(--obsidian-ink);
  color: var(--artist-vellum);
  padding: 4.5rem 0;
  border-top: 3px solid var(--gilded-sunburst);
  border-bottom: 3px solid var(--gilded-sunburst);
}

.spec-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.25rem;
}

.spec-architecture-card {
  background: rgba(250, 246, 238, 0.03);
  border: 1px solid var(--gilded-sunburst);
  padding: 1.65rem;
  clip-path: var(--chamfer-md);
}

.spec-card-kicker {
  font-family: var(--font-ui);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gilded-sunburst);
  margin-bottom: 0.4rem;
  display: block;
}

.spec-card-heading {
  font-size: 1.15rem;
  color: var(--artist-vellum);
  margin-bottom: 0.65rem;
}

.spec-card-body {
  font-size: 0.86rem;
  color: rgba(250, 246, 238, 0.8);
  line-height: 1.58;
}

/* Verbatim Two-Stage Prompt Accordion / Drawer */
.prompt-vault-drawer {
  background: rgba(15, 76, 69, 0.22);
  border: 1px solid var(--gilded-sunburst);
  padding: 1.5rem;
  clip-path: var(--chamfer-sm);
}

.prompt-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
}

.prompt-code-columns {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(212, 175, 55, 0.35);
}

.prompt-code-columns.open {
  display: grid;
}

.prompt-pre-box {
  background: rgba(24, 27, 32, 0.92);
  border: 1px solid rgba(212, 175, 55, 0.45);
  padding: 1.15rem;
  font-family: Consolas, Monaco, monospace;
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--artist-vellum);
  white-space: pre-wrap;
  max-height: 320px;
  overflow-y: auto;
}

/* ==========================================================================
   MODALS: STRIPE CHECKOUT SIMULATION & HIGH-RES LINEWORK LOUPE
   ========================================================================== */
.deco-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(24, 27, 32, 0.84);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.deco-modal-backdrop.open {
  display: flex;
}

.deco-modal-window {
  position: relative;
  width: 100%;
  max-width: 560px;
  background: var(--artist-vellum);
  color: var(--obsidian-ink);
  border: 2px solid var(--gilded-sunburst);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.65);
  padding: 2.25rem;
  clip-path: var(--chamfer-md);
}

.deco-modal-window.wide {
  max-width: 780px;
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  background: var(--obsidian-ink);
  color: var(--gilded-sunburst);
  border: 1px solid var(--gilded-sunburst);
  cursor: pointer;
  font-family: var(--font-ui);
  font-weight: 700;
}

.stripe-form-field {
  margin-bottom: 1rem;
}

.stripe-form-field label {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}

.deco-input {
  width: 100%;
  padding: 0.78rem 1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  background: #FFFFFF;
  color: var(--obsidian-ink);
  border: 1px solid var(--obsidian-ink);
  outline: 1px solid var(--gilded-sunburst);
  outline-offset: -4px;
}

/* Toast Notification */
.deco-toast {
  position: fixed;
  bottom: 26px;
  right: 26px;
  z-index: 3000;
  background: var(--obsidian-ink);
  color: var(--artist-vellum);
  border: 2px solid var(--gilded-sunburst);
  border-left: 5px solid var(--royal-amethyst);
  padding: 0.95rem 1.35rem;
  font-family: var(--font-ui);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.45);
  clip-path: var(--chamfer-sm);
  transform: translateY(130%);
  opacity: 0;
  transition: all var(--ease-deco);
}

.deco-toast.visible {
  transform: translateY(0);
  opacity: 1;
}

/* Footer */
.atelier-footer {
  background: var(--obsidian-ink);
  color: rgba(250, 246, 238, 0.75);
  padding: 3rem 0;
  border-top: 2px solid var(--gilded-sunburst);
  font-size: 0.84rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .showcase-grid,
  .upload-intake-grid,
  .preview-trio-grid,
  .checkout-pricing-grid,
  .spec-cards-grid,
  .prompt-code-columns {
    grid-template-columns: 1fr;
  }

  .state-machine-stepper {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .showcase-tabs-bar,
  .state-machine-stepper,
  .alchemy-steps-list {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }

  .studio-stage-vault {
    padding: 1.5rem 1.15rem;
  }
}