:root {
  --tool-bg: #120d0d;
  --tool-surface: rgba(24, 14, 14, 0.92);
  --tool-surface-strong: rgba(18, 11, 11, 0.98);
  --tool-line: rgba(255, 180, 128, 0.18);
  --tool-line-strong: rgba(255, 180, 128, 0.34);
  --tool-text: #f6f1ee;
  --tool-muted: #c8b6ae;
  --tool-accent: #ff8a4d;
  --tool-accent-strong: #ff6136;
  --tool-glow: rgba(255, 113, 64, 0.2);
  --control-radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
}

body {
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--tool-accent) 16%, transparent) 0%, transparent 38%),
    linear-gradient(180deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.01) 100%),
    var(--tool-bg);
  color: var(--tool-text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 24px;
}

body[data-dashboard-theme="water"] {
  --tool-bg: #0d1522;
  --tool-surface: rgba(12, 21, 37, 0.94);
  --tool-surface-strong: rgba(10, 17, 29, 0.98);
  --tool-line: rgba(114, 190, 255, 0.18);
  --tool-line-strong: rgba(114, 190, 255, 0.34);
  --tool-text: #eef5ff;
  --tool-muted: #a9bfd8;
  --tool-accent: #59b6ff;
  --tool-accent-strong: #3a9bff;
  --tool-glow: rgba(89, 182, 255, 0.2);
}

body[data-dashboard-theme="nature"] {
  --tool-bg: #11170f;
  --tool-surface: rgba(18, 24, 16, 0.94);
  --tool-surface-strong: rgba(13, 19, 11, 0.98);
  --tool-line: rgba(146, 213, 120, 0.18);
  --tool-line-strong: rgba(146, 213, 120, 0.34);
  --tool-text: #f2f8ee;
  --tool-muted: #bccfaf;
  --tool-accent: #82cd5f;
  --tool-accent-strong: #6ab84a;
  --tool-glow: rgba(130, 205, 95, 0.2);
}

body[data-dashboard-theme="rock"] {
  --tool-bg: #151515;
  --tool-surface: rgba(24, 24, 24, 0.95);
  --tool-surface-strong: rgba(16, 16, 16, 0.98);
  --tool-line: rgba(196, 190, 176, 0.18);
  --tool-line-strong: rgba(196, 190, 176, 0.34);
  --tool-text: #f2efea;
  --tool-muted: #b7aea2;
  --tool-accent: #c4ae8a;
  --tool-accent-strong: #a89070;
  --tool-glow: rgba(196, 174, 138, 0.2);
}

/* ── App Wrapper ─────────────────────────────── */

.app-wrapper {
  width: 100%;
  max-width: 580px;
}

.card {
  background: var(--tool-surface);
  border: 1px solid var(--tool-line);
  padding: 32px;
  border-radius: 20px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 16px 40px rgba(0,0,0,0.4);
}

.card h2 {
  margin: 0 0 6px;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card > p {
  margin: 0 0 24px;
  color: var(--tool-muted);
  font-size: 14px;
  line-height: 1.5;
}

/* ── Upload Area ─────────────────────────────── */

.upload-area {
  border: 2px dashed var(--tool-line-strong);
  padding: 36px 20px;
  margin-bottom: 20px;
  cursor: pointer;
  transition: border-color 0.25s, background 0.25s;
  border-radius: 14px;
  background: rgba(0,0,0,0.18);
  text-align: center;
}

.upload-area:hover {
  border-color: var(--tool-accent);
  background: color-mix(in srgb, var(--tool-accent) 8%, rgba(255,255,255,0.03));
}

.upload-area__icon {
  display: block;
  font-size: 36px;
  margin-bottom: 10px;
  opacity: 0.7;
}

.upload-area__text {
  font-size: 15px;
  color: var(--tool-muted);
}

.upload-area__hint {
  display: block;
  font-size: 12px;
  margin-top: 6px;
  opacity: 0.7;
}

/* ── Preview Grid ────────────────────────────── */

.preview-grid {
  display: none;
  grid-template-columns: repeat(3, 80px);
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
  padding: 20px 0;
}

.preview-grid.visible {
  display: grid;
}

.preview-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.preview-item img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 10px;
  border: 1px solid var(--tool-line);
  background:
    linear-gradient(45deg, rgba(255,255,255,.06) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,.06) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,.06) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,.06) 75%),
    rgba(10,10,10,.9);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

.preview-item small {
  color: var(--tool-muted);
  font-size: 11px;
  font-weight: 600;
}

/* ── Download Button ─────────────────────────── */

#dlBtn {
  display: none;
  background: linear-gradient(180deg, var(--tool-accent), var(--tool-accent-strong));
  border: 1px solid color-mix(in srgb, var(--tool-accent) 75%, white 20%);
  box-shadow: 0 14px 28px var(--tool-glow);
  padding: 14px 24px;
  border-radius: var(--control-radius);
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  margin-top: 0;
  font-size: 15px;
  color: #000;
  transition: transform 0.2s, box-shadow 0.2s;
}

#dlBtn.visible {
  display: block;
}

#dlBtn:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 18px 36px var(--tool-glow);
}

#dlBtn:active {
  transform: translateY(0);
}

/* ── Status ──────────────────────────────────── */

.status {
  margin-top: 14px;
  font-size: 13px;
  color: var(--tool-muted);
  text-align: center;
  min-height: 20px;
}

/* ── Code Snippet ────────────────────────────── */

#codeSnippet {
  display: none;
  background: var(--tool-surface-strong);
  padding: 16px;
  margin-top: 20px;
  border-radius: 12px;
  font-size: 12px;
  color: var(--accent);
  white-space: pre;
  overflow-x: auto;
  border: 1px solid var(--tool-line);
  line-height: 1.6;
}

#codeSnippet.visible {
  display: block;
}

/* ── Responsive ──────────────────────────────── */

@media (max-width: 500px) {
  .card { padding: 24px 20px; }
  .preview-grid { grid-template-columns: repeat(3, 64px); gap: 12px; }
  .preview-item img { width: 64px; height: 64px; }
}