static/style.css

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

:root {
  --bg: linear-gradient(135deg, #050505 0%, #0c0c0f 45%, #111117 100%);
  --surface: rgba(20, 20, 24, 0.92);
  --surface-strong: #18181d;
  --surface2: #101015;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text-primary: #f5f5f7;
  --text-secondary: #b3b3bd;
  --text-muted: #8a8a96;
  --accent: #7c6cff;
  --accent-2: #9b8cff;
  --accent-light: rgba(124, 108, 255, 0.14);
  --accent-soft: rgba(124, 108, 255, 0.08);
  --accent-text: #d7d1ff;
  --danger: #ff5c5c;
  --danger-light: rgba(255, 92, 92, 0.14);
  --danger-text: #ffd2d2;
  --success: #26c281;
  --success-light: rgba(38, 194, 129, 0.14);
  --success-text: #c9f5e2;
  --amber: #f2b94b;
  --amber-light: rgba(242, 185, 75, 0.14);
  --amber-text: #ffe9bb;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 26px;
  --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.28);
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.34);
  --shadow-lg: 0 24px 70px rgba(0, 0, 0, 0.45);
  --max-width: 760px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem 4rem;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: -1;
}

body::before {
  top: -70px;
  left: -90px;
  background: rgba(124, 108, 255, 0.14);
}

body::after {
  right: -70px;
  bottom: -70px;
  background: rgba(64, 64, 255, 0.09);
}

/* ── Header ─────────────────────────────────────────────── */
header {
  text-align: center;
  margin-bottom: 2rem;
  max-width: 720px;
}

#three-header {
  margin-bottom: 0.4rem !important;
  filter: drop-shadow(0 16px 34px rgba(124, 108, 255, 0.18));
}

.logo-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 62px;
  height: 62px;
  background: linear-gradient(135deg, #181824 0%, #202033 100%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(124, 108, 255, 0.18);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.logo-wrap svg {
  width: 30px;
  height: 30px;
}

header h1 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.04em;
  line-height: 1.1;
}

header p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 0.7rem;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Main card ───────────────────────────────────────────── */
main {
  width: 100%;
  max-width: var(--max-width);
}

.card {
  background: var(--surface);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(124, 108, 255, 0.5), transparent);
}

/* ── Drop zone ───────────────────────────────────────────── */
#drop-zone {
  border: 2px dashed rgba(124, 108, 255, 0.24);
  border-radius: calc(var(--radius-lg) + 2px);
  padding: 3.2rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: 0.25s ease;
  background:
    radial-gradient(circle at top, rgba(124, 108, 255, 0.09), transparent 45%),
    var(--surface2);
  position: relative;
  overflow: hidden;
}

#drop-zone::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124, 108, 255, 0.05), rgba(255, 255, 255, 0));
  pointer-events: none;
}

#drop-zone:hover,
#drop-zone.drag-over {
  border-color: var(--accent);
  background:
    radial-gradient(circle at top, rgba(124, 108, 255, 0.15), transparent 45%),
    #12121a;
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(124, 108, 255, 0.12);
}

#drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.drop-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, #171722 0%, #232338 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(124, 108, 255, 0.16);
  box-shadow: 0 10px 24px rgba(124, 108, 255, 0.08);
}

.drop-icon svg {
  width: 26px;
  height: 26px;
}

#drop-zone h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

#drop-zone p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* ── Limit badge ─────────────────────────────────────────── */
.limit-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--amber-light);
  color: var(--amber-text);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 999px;
  margin-top: 0.95rem;
  border: 1px solid rgba(242, 185, 75, 0.18);
  box-shadow: 0 6px 16px rgba(242, 185, 75, 0.08);
}

/* ── Counter bar ─────────────────────────────────────────── */
#counter-bar {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 1.25rem;
  padding: 0.8rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 13px;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
}

#counter-bar.visible {
  display: flex;
}

#counter-bar .count-num {
  font-weight: 700;
  color: var(--text-primary);
}

.count-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  display: inline-block;
  margin-right: 6px;
  box-shadow: 0 0 0 4px rgba(38, 194, 129, 0.12);
}

.count-dot.warn {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 185, 75, 0.12);
}

.count-dot.danger {
  background: var(--danger);
  box-shadow: 0 0 0 4px rgba(255, 92, 92, 0.12);
}

/* ── Image preview grid ──────────────────────────────────── */
#preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(115px, 1fr));
  gap: 14px;
  margin-top: 1.35rem;
}

.preview-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.07);
  background: linear-gradient(180deg, #14141a 0%, #0f0f14 100%);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.preview-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 36px rgba(0, 0, 0, 0.34);
  border-color: rgba(124, 108, 255, 0.20);
}

.preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.preview-item::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 40%;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.32), transparent);
  pointer-events: none;
}

.preview-item .remove-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(12, 12, 16, 0.82);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.10);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: 0.18s ease;
  z-index: 2;
}

.preview-item:hover .remove-btn {
  opacity: 1;
}

.preview-item .remove-btn:hover {
  background: rgba(255, 92, 92, 0.92);
  transform: scale(1.05);
}

.preview-item .remove-btn svg {
  width: 12px;
  height: 12px;
  stroke: #fff;
}

.preview-item .order-badge {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(12, 12, 16, 0.72);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  z-index: 2;
}

/* ── Actions ─────────────────────────────────────────────── */
.actions {
  display: flex;
  gap: 12px;
  margin-top: 1.6rem;
}

button {
  font-family: inherit;
  cursor: pointer;
  border-radius: 14px;
  font-size: 14px;
  font-weight: 700;
  padding: 12px 18px;
  transition: 0.18s ease;
  border: 1px solid var(--border-strong);
  outline: none;
}

button:focus-visible,
#drop-zone:focus-within {
  box-shadow: 0 0 0 4px rgba(124, 108, 255, 0.16);
}

button:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  border-color: transparent;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 14px 26px rgba(124, 108, 255, 0.20);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 34px rgba(124, 108, 255, 0.25);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  border-color: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border-color: rgba(124, 108, 255, 0.18);
}

/* ── Toast ───────────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 1.6rem;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: rgba(17, 17, 22, 0.92);
  backdrop-filter: blur(14px);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 12px 18px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  white-space: nowrap;
  z-index: 200;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.30);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Overlay + Premium dialog ────────────────────────────── */
#overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(3, 3, 6, 0.72);
  backdrop-filter: blur(8px);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

#overlay.show {
  display: flex;
}

#premium-dialog {
  background: rgba(20, 20, 25, 0.96);
  backdrop-filter: blur(16px);
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.48);
  padding: 2rem;
  max-width: 430px;
  width: 100%;
  text-align: center;
  animation: pop-in 0.22s ease;
}

@keyframes pop-in {
  from {
    transform: scale(0.92) translateY(14px);
    opacity: 0;
  }
  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.dialog-icon {
  width: 68px;
  height: 68px;
  border-radius: 20px;
  background: linear-gradient(135deg, #2d2410 0%, #3f3114 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  border: 1px solid rgba(242, 185, 75, 0.18);
  box-shadow: 0 12px 24px rgba(242, 185, 75, 0.08);
}

.dialog-icon svg {
  width: 30px;
  height: 30px;
}

#premium-dialog h2 {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

#premium-dialog p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.4rem;
  line-height: 1.7;
}

.perks {
  list-style: none;
  text-align: left;
  margin-bottom: 1.7rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 18px;
  padding: 0.85rem 1rem;
}

.perks li {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
}

.perks li + li {
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
}

.perk-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--success-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.perk-check svg {
  width: 10px;
  height: 10px;
  stroke: var(--success);
}

.dialog-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-upgrade {
  background: linear-gradient(135deg, #7c6cff 0%, #9b8cff 100%);
  color: #fff;
  border: none;
  padding: 13px;
  font-size: 15px;
  border-radius: 14px;
  width: 100%;
  box-shadow: 0 14px 26px rgba(124, 108, 255, 0.18);
}

.btn-upgrade:hover {
  transform: translateY(-1px);
  opacity: 0.97;
}

.btn-close-dialog {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  padding: 11px;
  width: 100%;
  border-radius: 14px;
}

.btn-close-dialog:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

/* ── Progress bar (inside btn) ───────────────────────────── */
#loading-bar {
  display: none;
  height: 4px;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  overflow: hidden;
  width: 120px;
}

#loading-bar-fill {
  height: 100%;
  background: #fff;
  border-radius: 999px;
  animation: slide 1s infinite ease-in-out;
}

@keyframes slide {
  0% {
    width: 0%;
    margin-left: 0;
  }
  50% {
    width: 60%;
    margin-left: 20%;
  }
  100% {
    width: 0%;
    margin-left: 100%;
  }
}

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-thumb {
  background: rgba(124, 108, 255, 0.22);
  border-radius: 999px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.03);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  body {
    padding: 1.25rem 0.85rem 3rem;
  }

  .card {
    padding: 1.2rem;
    border-radius: 22px;
  }

  #drop-zone {
    padding: 2.3rem 1rem;
  }

  .actions {
    flex-direction: column;
  }

  .btn-ghost,
  .btn-primary {
    width: 100%;
  }

  #counter-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  #preview-grid {
    grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
    gap: 10px;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1.85rem;
  }

  header p {
    font-size: 0.92rem;
  }

  #premium-dialog {
    padding: 1.3rem;
    border-radius: 22px;
  }

  .dialog-icon {
    width: 60px;
    height: 60px;
  }

  #toast {
    white-space: normal;
    width: calc(100% - 24px);
    text-align: center;
    border-radius: 16px;
  }
}