/* ============================================================
   [Platform] — Premium Collectible Drop
   Direction: "Noir & Champagne" — layered black glass panels,
   champagne-gold accents, serif display type, quiet luxury.
   ============================================================ */

/* ===== DESIGN TOKENS ===== */
:root {
  --bg-0: #0a0a0c;
  --bg-1: #101014;
  --bg-2: #15151b;

  --panel: rgba(255, 255, 255, 0.03);
  --panel-strong: rgba(255, 255, 255, 0.05);

  --gold: #d4af37;
  --gold-hi: #f5e7b0;
  --gold-lo: #a8842e;
  --gold-dim: rgba(212, 175, 55, 0.55);
  --gold-faint: rgba(212, 175, 55, 0.22);
  --gold-wash: rgba(212, 175, 55, 0.07);

  --gold-gradient: linear-gradient(135deg, #f5e7b0 0%, #d4af37 45%, #a8842e 100%);

  --text-1: #f3f1ea;
  --text-2: #a49f92;
  --text-3: #6f6b60;

  --radius-card: 16px;
  --radius-pill: 999px;

  --ease: cubic-bezier(0.22, 0.8, 0.3, 1);
  --t-fast: 150ms;
  --t-med: 250ms;

  --shadow-panel: 0 10px 30px rgba(0, 0, 0, 0.45);
  --glow-gold: 0 8px 28px rgba(212, 175, 55, 0.18);

  --font-display: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ===== RESET ===== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-body);
  color: #fff;
  letter-spacing: 0.02em;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(1100px 700px at 50% -12%, rgba(212, 175, 55, 0.075), transparent 60%),
    radial-gradient(900px 620px at 88% 112%, rgba(94, 78, 34, 0.09), transparent 55%),
    var(--bg-0);
}

/* Safety net: never allow horizontal page scroll (per-screen
   vertical scrolling is untouched). */
html, body { overflow-x: hidden; }

/* vignette */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background: radial-gradient(140% 120% at 50% 42%, transparent 58%, rgba(0, 0, 0, 0.5) 100%);
}

h1, h2, h3, strong { font-weight: 700; }

/* accessible focus */
button:focus-visible,
.drop-card:focus-visible,
.payment-option:focus-visible {
  outline: 2px solid var(--gold-dim);
  outline-offset: 2px;
}

/* thin custom scrollbar */
.screen::-webkit-scrollbar { width: 6px; }
.screen::-webkit-scrollbar-track { background: transparent; }
.screen::-webkit-scrollbar-thumb { background: rgba(212, 175, 55, 0.25); border-radius: 3px; }

/* ===== TYPE HELPERS ===== */

.eyebrow {
  display: block;
  font-size: 0.64rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4em;
  color: var(--gold-dim);
  margin-bottom: 10px;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.8rem, 6vw, 2.3rem);
  letter-spacing: 0.01em;
  line-height: 1.1;
  margin-bottom: 24px;
}
.section-title .gold {
  font-style: italic;
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tabular,
.drop-card .countdown,
.checkout-timer,
.drop-detail .price,
.checkout .order-summary .row.total span {
  font-variant-numeric: tabular-nums;
}

/* ===== SCREEN LAYOUT (SPA show/hide) ===== */

.screen {
  display: none;
  position: relative;
  z-index: 1;
  height: 100vh;
  max-width: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px 20px 104px;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

.screen.active { display: flex; }

/* CSS fallback entrance (used when gsap unavailable / reduced-motion off) */
.screen.entering { animation: screen-enter 400ms var(--ease) both; }
@keyframes screen-enter {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== HEADER ===== */

.app-header {
  width: 100%;
  max-width: 480px;
  text-align: center;
  padding: 14px 0 18px;
  position: relative;
  margin-bottom: 28px;
}
.app-header::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 120px;
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
}

.app-header h1 {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  background: linear-gradient(180deg, #fff 20%, #cfc9b8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===== GLASS PANEL BASE ===== */

.glass {
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--gold-faint);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-panel);
}

/* ===== LANDING (screen 1) ===== */

.drops-list {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.drop-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--gold-faint);
  border-radius: var(--radius-card);
  padding: 16px;
  cursor: pointer;
  box-shadow: var(--shadow-panel);
  transition: transform var(--t-med) var(--ease), border-color var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
}

.drop-card:hover,
.drop-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(212, 175, 55, 0.6);
  box-shadow: var(--shadow-panel), var(--glow-gold);
}

.drop-card-thumb {
  width: 60px;
  height: 84px;
  flex: 0 0 auto;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--gold-faint);
  background: linear-gradient(135deg, var(--bg-1), var(--bg-2));
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
}
.drop-card-thumb--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-3);
}

.drop-card-body { flex: 1 1 auto; min-width: 0; }

.drop-card .series {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-2);
  margin-bottom: 4px;
}
.drop-card .card-name {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.15;
  margin-bottom: 10px;
}
.drop-card .meta {
  font-size: 0.78rem;
  color: var(--text-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 8px;
}

.badge-upcoming {
  display: inline-block;
  font-size: 0.56rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--gold);
  border: 1px solid var(--gold-faint);
  background: var(--gold-wash);
  border-radius: var(--radius-pill);
  padding: 3px 9px;
  margin-bottom: 8px;
}

.countdown-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  background: var(--gold-wash);
  border: 1px solid var(--gold-faint);
  color: var(--gold);
  border-radius: var(--radius-pill);
  padding: 5px 11px;
  font-size: 0.74rem;
  font-weight: 700;
}
.countdown-pill .countdown { color: var(--gold); font-weight: 700; }
.pulse-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--gold);
  animation: dot-pulse 2s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.5); }
  50% { opacity: 0.5; box-shadow: 0 0 0 5px rgba(212, 175, 55, 0); }
}

/* ===== DROP DETAIL (screen 2) ===== */

.drop-detail {
  width: 100%;
  max-width: 480px;
}

.drop-detail .artwork-preview {
  position: relative;
  width: 100%;
  aspect-ratio: 63/88;
  background: linear-gradient(135deg, #12121c, #171a2b);
  border-radius: var(--radius-card);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(212, 175, 55, 0.45);
  box-shadow:
    0 30px 60px rgba(0, 0, 0, 0.55),
    0 0 50px rgba(212, 175, 55, 0.09);
  overflow: hidden;
}
/* soft gloss sweep */
.drop-detail .artwork-preview::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, rgba(255, 255, 255, 0.09) 0%, transparent 30%, transparent 68%, rgba(255, 255, 255, 0.05) 100%);
}
/* soft gold pooling / gloss at the base of the frame */
.drop-detail .artwork-preview::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 45%;
  background: linear-gradient(180deg, transparent, rgba(212, 175, 55, 0.09) 70%, rgba(245, 231, 176, 0.12) 100%);
  filter: blur(2px);
  pointer-events: none;
}

.drop-detail .artwork-preview img {
  max-width: 80%;
  max-height: 80%;
  border-radius: 8px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.5);
}

.drop-detail .series-label {
  font-size: 0.64rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--gold-dim);
}
.drop-detail .card-title {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.05;
  margin: 6px 0 14px;
}
.drop-detail .narrative {
  color: var(--text-2);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 24px;
}
.drop-detail .price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  margin-bottom: 20px;
}
.drop-detail .price {
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.drop-detail .units-info { color: var(--text-2); font-size: 0.82rem; }

/* CTA — sticky fallback keeps it reachable on tall single-column
   layouts (mobile); inert once the two-column grid fits it on screen. */
.btn-cta {
  position: sticky;
  bottom: 84px; /* sits above the floating nav */
  z-index: 5;
  display: block;
  width: 100%;
  padding: 16px 24px;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--gold-gradient);
  color: #171204;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(212, 175, 55, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-med) var(--ease), filter var(--t-fast) var(--ease);
}
.btn-cta:hover { transform: translateY(-2px); filter: brightness(1.06); box-shadow: 0 14px 34px rgba(212, 175, 55, 0.38), inset 0 1px 0 rgba(255, 255, 255, 0.5); }
.btn-cta:active { transform: translateY(0) scale(0.99); }

/* ===== CHECKOUT (screen 3) ===== */

.checkout { width: 100%; max-width: 480px; }

.checkout-timer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--gold-wash);
  border: 1px solid var(--gold-faint);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--gold-hi);
  text-align: center;
  padding: 14px 16px;
  border-radius: var(--radius-card);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 24px;
}
.checkout-timer span { color: inherit; }
#checkout-timer {
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.checkout-timer.expired {
  background: rgba(185, 28, 28, 0.14);
  border-color: rgba(220, 70, 70, 0.4);
  color: #f3b8b8;
}
.checkout-timer.expired #checkout-timer {
  background: none;
  -webkit-background-clip: border-box;
  background-clip: border-box;
  color: inherit;
  font-size: 1.05rem;
}

.checkout .order-summary {
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--gold-faint);
  border-radius: var(--radius-card);
  padding: 22px 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-panel);
}
.checkout .order-summary .row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  font-size: 0.88rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.checkout .order-summary .row span:first-child {
  font-size: 0.64rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-2);
}
.checkout .order-summary .row span:last-child { font-weight: 600; }
.checkout .order-summary .row.total {
  border-bottom: none;
  margin-top: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--gold-faint);
}
.checkout .order-summary .row.total span:first-child {
  font-size: 0.72rem;
  color: var(--gold-dim);
}
.checkout .order-summary .row.total span:last-child {
  font-size: 1.35rem;
  font-weight: 700;
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.payment-heading {
  display: block;
  font-size: 0.64rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--gold-dim);
  margin-bottom: 12px;
}

.payment-options { display: flex; flex-direction: column; gap: 10px; }
.payment-option {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 15px 16px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.payment-option:hover { border-color: rgba(212, 175, 55, 0.45); transform: translateY(-1px); }
/* gold radio indicator */
.payment-option::after {
  content: "";
  margin-left: auto;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  transition: border var(--t-fast) var(--ease), background var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.payment-option.selected {
  border-color: rgba(212, 175, 55, 0.75);
  background: var(--gold-wash);
  box-shadow: 0 0 0 1px rgba(212, 175, 55, 0.35), var(--glow-gold);
}
.payment-option.selected::after {
  border: 5px solid var(--gold);
  background: #171204;
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.45);
}

/* ===== ORDER SUCCESS (screen 4) ===== */

.order-success { width: 100%; max-width: 480px; text-align: center; }

.order-success .success-icon { margin: 8px auto 20px; width: 88px; height: 88px; }
.check-circle { width: 88px; height: 88px; overflow: visible; }
.check-circle circle {
  fill: rgba(212, 175, 55, 0.06);
  stroke: url(#goldStroke);
  stroke-width: 2;
  stroke-dasharray: 264;
  stroke-dashoffset: 264;
  transform-origin: center;
}
.check-circle path {
  stroke: var(--gold);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  stroke-dasharray: 60;
  stroke-dashoffset: 60;
}
.screen.active .check-circle circle { animation: check-ring 700ms var(--ease) forwards; }
.screen.active .check-circle path { animation: check-draw 450ms var(--ease) 550ms forwards; }
@keyframes check-ring { to { stroke-dashoffset: 0; } }
@keyframes check-draw { to { stroke-dashoffset: 0; } }

.order-success h2 {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.order-success .order-id {
  display: inline-block;
  background: var(--panel);
  border: 1px solid var(--gold-faint);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  margin: 14px 0;
  color: var(--gold);
}
.order-success .delivery-info { color: var(--text-2); font-size: 0.9rem; margin-bottom: 20px; }
.order-success .next-steps {
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--gold);
  padding: 18px;
  border-radius: 0 12px 12px 0;
  text-align: left;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-2);
}
.order-success .next-steps strong { color: var(--text-1); }

/* ===== NFC TAP (screen 5) ===== */

.nfc-tap-screen {
  justify-content: center;
  text-align: center;
}
.nfc-icon {
  position: relative;
  width: 128px;
  height: 128px;
  border: 1.5px solid rgba(212, 175, 55, 0.7);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  margin: 0 auto 28px;
  background: radial-gradient(circle at 50% 35%, rgba(212, 175, 55, 0.12), transparent 70%);
  box-shadow: 0 0 40px rgba(212, 175, 55, 0.12), inset 0 0 24px rgba(212, 175, 55, 0.08);
}
.nfc-ring {
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  border: 1px solid rgba(212, 175, 55, 0.55);
  opacity: 0;
  pointer-events: none;
  animation: nfc-ring 2.6s var(--ease) infinite;
}
.nfc-ring--2 { animation-delay: 1.3s; }
@keyframes nfc-ring {
  0% { transform: scale(1); opacity: 0.55; }
  100% { transform: scale(2); opacity: 0; }
}
.nfc-tap-screen .instruction { font-size: 1.05rem; color: var(--text-2); max-width: 320px; line-height: 1.7; }
.nfc-tap-screen .instruction strong { color: var(--text-1); font-size: 1.2rem; }

/* ===== 3D VIEWER + OWNERSHIP (screen 6) ===== */

#screen-6 { position: relative; padding: 0; overflow: hidden; }
#three-container {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1;
}
#loading-3d {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  z-index: 5;
  display: block;
  text-align: center;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-dim);
  max-width: 80vw;
}
#loading-3d span { color: inherit; }
#loading-3d.load-error::before { display: none; }
#loading-3d::before {
  content: "";
  display: block;
  width: 38px;
  height: 38px;
  margin: 0 auto 14px;
  border-radius: 50%;
  border: 2px solid rgba(212, 175, 55, 0.18);
  border-top-color: var(--gold);
  animation: spinner 0.9s linear infinite;
}
@keyframes spinner { to { transform: rotate(360deg); } }

.ownership-popup {
  position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%);
  width: 90%; max-width: 420px;
  background: rgba(12, 12, 15, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--gold-faint);
  border-radius: var(--radius-card) var(--radius-card) 0 0;
  padding: 22px;
  z-index: 50;
  box-shadow: 0 -14px 44px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.ownership-popup.collapsed { transform: translateX(-50%) translateY(100%); opacity: 0; pointer-events: none; }
.ownership-popup::before {
  content: "";
  position: absolute;
  top: 0; left: 16px; right: 16px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
}
.ownership-popup h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 14px;
}
.ownership-popup .info-row {
  display: flex; justify-content: space-between; gap: 12px; padding: 9px 0;
  font-size: 0.84rem; border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.ownership-popup .info-row:last-child { border-bottom: none; }
.ownership-popup .info-label {
  color: var(--text-3);
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  align-self: center;
}
.ownership-popup .info-value { font-weight: 600; text-align: right; }
.verify-badge {
  display: inline-block; padding: 5px 14px; border-radius: 20px;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; margin-bottom: 14px;
}
.verify-badge.verified { background: rgba(34, 197, 94, 0.12); color: #4ade80; border: 1px solid rgba(34, 197, 94, 0.4); }

.toggle-info-btn {
  position: fixed; top: 20px; right: 20px; z-index: 60;
  background: rgba(12, 12, 15, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--gold-hi);
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: var(--radius-pill);
  padding: 11px 18px;
  font-weight: 600; font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.toggle-info-btn:hover { background: rgba(212, 175, 55, 0.14); border-color: rgba(212, 175, 55, 0.7); transform: translateY(-1px); }

/* ===== FLOATING NAV (shared all screens) ===== */

#floating-nav {
  position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 12px; z-index: 1000;
  background: rgba(14, 14, 18, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-pill);
  padding: 8px 10px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.5);
}
.nav-btn {
  background: var(--gold-gradient);
  color: #171204;
  border: none;
  border-radius: var(--radius-pill);
  padding: 10px 20px;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
  transition: filter var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.nav-btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.nav-btn:active { transform: scale(0.96); }
.nav-btn:disabled {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-3);
  box-shadow: none;
  opacity: 1;
  cursor: not-allowed;
  transform: none;
  filter: none;
}
#phase-indicator {
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--text-2);
  min-width: 96px;
  text-align: center;
}

/* ===== MOTION SAFETY ===== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .check-circle circle, .check-circle path { stroke-dashoffset: 0; }
}

/* ===== RESPONSIVE ===== */

@media (min-width: 768px) {
  .screen { padding-top: 40px; }

  /* Wider content columns so desktop doesn't feel like a phone layout */
  .app-header,
  .drop-detail,
  .checkout,
  .order-success { max-width: 560px; }

  /* Landing: two-column grid of drop cards */
  .drops-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    max-width: 680px;
  }

  /* Screen 2: two columns — artwork left, info right — so the CTA
     fits within an 800px-tall viewport without scrolling. */
  .drop-detail {
    display: grid;
    grid-template-columns: minmax(0, 45fr) minmax(0, 55fr);
    column-gap: 36px;
    align-content: start;
  }
  .drop-detail .artwork-preview {
    grid-column: 1;
    grid-row: 1 / span 5;
    align-self: start;
    margin-bottom: 0;
  }
  .drop-detail .series-label { grid-column: 2; grid-row: 1; }
  .drop-detail .card-title { grid-column: 2; grid-row: 2; }
  .drop-detail .narrative { grid-column: 2; grid-row: 3; }
  .drop-detail .price-row { grid-column: 2; grid-row: 4; }
  .drop-detail .btn-cta { grid-column: 2; grid-row: 5; }
}

@media (min-width: 1024px) {
  .app-header,
  .drop-detail,
  .checkout,
  .order-success { max-width: 600px; }
}

@media (min-width: 1100px) {
  /* Keep 2 columns but give the cards more room */
  .drops-list { max-width: 860px; }
}

@media (max-width: 390px) {
  .drop-card { padding: 14px; gap: 12px; }
  .drop-card-thumb { width: 52px; height: 73px; }
  .drop-detail .card-title { font-size: 2.2rem; }
  #floating-nav { gap: 8px; padding: 7px 8px; }
  .nav-btn { padding: 10px 14px; }
  #phase-indicator { min-width: 76px; font-size: 0.6rem; }
}