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

/* ── Global hidden class ── */
.hidden { display: none !important; }

/* ── Light theme (default) ── */
:root, [data-theme="light"] {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --surface-raised: #ffffff;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99,102,241,.08);
  --text: #0f172a;
  --text-2: #475569;
  --text-3: #94a3b8;
  --border: #e2e8f0;
  --border-focus: #6366f1;
  --canvas-bg: #1e293b;
  --canvas-fill: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-lg: 0 4px 16px rgba(0,0,0,.1);
  --toast-bg: #0f172a;
  --toast-fg: #f1f5f9;
  --transition: 180ms ease;
  color-scheme: light;
}

/* ── Dark theme ── */
[data-theme="dark"] {
  --bg: #0b1120;
  --surface: #162032;
  --surface-alt: #1c2a3f;
  --surface-raised: #1e3048;
  --primary: #818cf8;
  --primary-hover: #6366f1;
  --primary-light: rgba(129,140,248,.1);
  --text: #e2e8f0;
  --text-2: #94a3b8;
  --text-3: #64748b;
  --border: #1e3048;
  --border-focus: #818cf8;
  --canvas-bg: #0f172a;
  --canvas-fill: #1e293b;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow: 0 1px 4px rgba(0,0,0,.3);
  --shadow-lg: 0 4px 20px rgba(0,0,0,.4);
  --toast-bg: #e2e8f0;
  --toast-fg: #0f172a;
  color-scheme: dark;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background .3s, color .3s;
}

/* ── Header ── */
.header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.header-left { display: flex; align-items: center; gap: 10px; }
.header h1 { font-size: 1.15rem; font-weight: 700; white-space: nowrap; }
.badge {
  font-size: .6rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
  padding: 2px 7px; border-radius: 5px;
  background: var(--primary-light); color: var(--primary);
}

.icon-btn {
  width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface-alt); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-2); transition: background var(--transition), color var(--transition);
}
.icon-btn:hover { background: var(--primary-light); color: var(--primary); }

/* Theme icon switching */
[data-theme="light"] .icon-moon,
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="light"] .icon-sun,
[data-theme="dark"] .icon-moon { display: block; }

/* ── Upload Screen ── */
.upload-screen {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: calc(100vh - 56px); padding: 32px 24px; gap: 28px;
  animation: fadeUp .4s ease;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.upload-card {
  width: 100%; max-width: 480px;
  background: var(--surface); border: 2px dashed var(--border); border-radius: 16px;
  padding: 52px 32px; text-align: center; cursor: pointer;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}
.upload-card:hover, .upload-card.drag-over {
  border-color: var(--primary); background: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(99,102,241,.08);
}
.upload-icon { color: var(--text-3); margin-bottom: 16px; transition: color var(--transition); }
.upload-card:hover .upload-icon { color: var(--primary); }
.upload-card h2 { font-size: 1.2rem; font-weight: 700; margin-bottom: 6px; }
.upload-sub { color: var(--text-2); font-size: .9rem; }
.upload-link { color: var(--primary); font-weight: 600; cursor: pointer; }
.upload-hint { margin-top: 10px; font-size: .76rem; color: var(--text-3); }

.upload-footer {
  display: flex; gap: 12px; flex-wrap: wrap; justify-content: center;
}
.spec-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 18px; display: flex; flex-direction: column; align-items: center; gap: 2px;
  font-size: .78rem; color: var(--text-2); min-width: 110px;
}
.spec-card strong { font-size: .72rem; color: var(--text-3); }

/* ── Editor Screen ── */
.editor-screen { animation: fadeUp .35s ease; }

/* ── Gallery Strip ── */
.gallery {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.gallery-scroll {
  display: flex; gap: 8px; overflow-x: auto; flex: 1; padding: 2px 0;
  scrollbar-width: thin; scrollbar-color: var(--border) transparent;
}
.gallery-scroll::-webkit-scrollbar { height: 4px; }
.gallery-scroll::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.gallery-item {
  flex-shrink: 0; width: 52px; height: 52px; border-radius: 10px;
  overflow: hidden; cursor: pointer; position: relative;
  border: 2.5px solid transparent; background: var(--surface-alt);
  transition: border-color var(--transition), transform 120ms, box-shadow var(--transition);
}
.gallery-item:hover { transform: scale(1.08); }
.gallery-item.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,.18);
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gallery-item-del {
  position: absolute; top: 2px; right: 2px; width: 16px; height: 16px;
  border-radius: 50%; border: none;
  background: rgba(0,0,0,.6); color: #fff; font-size: 10px; line-height: 1;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity 120ms;
}
.gallery-item:hover .gallery-item-del { opacity: 1; }

.gallery-add {
  flex-shrink: 0; height: 40px; padding: 0 14px; border-radius: 8px;
  border: 1.5px dashed var(--border); background: transparent; cursor: pointer;
  color: var(--text-3); display: flex; align-items: center; gap: 5px;
  font-size: .75rem; font-weight: 600; white-space: nowrap;
  transition: border-color var(--transition), color var(--transition);
}
.gallery-add:hover { border-color: var(--primary); color: var(--primary); }

/* ── Editor Body ── */
.editor-body {
  display: flex; gap: 20px; padding: 20px;
  align-items: flex-start; max-width: 1060px; margin: 0 auto;
}
.canvas-col { flex-shrink: 0; }

.canvas-frame {
  background: var(--canvas-bg); padding: 10px; border-radius: 14px;
  box-shadow: var(--shadow-lg); line-height: 0; display: inline-block;
  position: relative;
}
canvas {
  border-radius: 8px; cursor: grab; touch-action: none;
  max-width: 100%; height: auto;
}
canvas:active { cursor: grabbing; }

.canvas-loading {
  position: absolute; inset: 0; display: flex;
  align-items: center; justify-content: center;
  background: rgba(15,23,42,.5); border-radius: 14px;
}
.spinner {
  width: 32px; height: 32px; border: 3px solid rgba(255,255,255,.2);
  border-top-color: #fff; border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.canvas-bar {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 8px; font-size: .73rem;
}
.spec-badge {
  background: var(--surface); border: 1px solid var(--border);
  padding: 3px 10px; border-radius: 20px;
  color: var(--text-3); font-weight: 500; font-size: .7rem;
}
.guide-toggle {
  display: flex; align-items: center; gap: 5px; cursor: pointer;
  color: var(--text-3); font-weight: 500; user-select: none; font-size: .73rem;
}
.guide-toggle input { accent-color: var(--primary); }
.canvas-tip {
  text-align: center; font-size: .7rem; color: var(--text-3); margin-top: 6px;
}

/* ── Controls Panel ── */
.controls {
  flex: 1; min-width: 250px;
  display: flex; flex-direction: column; gap: 14px;
}
.ctrl-section {
  background: var(--surface); border-radius: 14px;
  padding: 18px; box-shadow: var(--shadow);
}
.ctrl-section h3 {
  font-size: .75rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-3); margin-bottom: 14px;
}

.slider-row {
  display: flex; align-items: center; gap: 8px; margin-bottom: 10px;
}
.slider-row label {
  min-width: 64px; font-size: .78rem; font-weight: 500; color: var(--text-2);
}
.slider-row input[type="range"] {
  flex: 1; accent-color: var(--primary); height: 5px;
}
.val {
  min-width: 42px; text-align: right;
  font-size: .72rem; color: var(--text-3);
  font-variant-numeric: tabular-nums; font-weight: 500;
}

.field-row {
  display: flex; align-items: center; gap: 8px; margin-bottom: 10px;
}
.field-row label {
  min-width: 48px; font-size: .78rem; font-weight: 500; color: var(--text-2);
}
.field-row select, .field-row input[type="number"] {
  flex: 1; padding: 7px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: .8rem; background: var(--surface-alt); color: var(--text);
  transition: border-color var(--transition);
}
.field-row select:focus, .field-row input:focus {
  outline: none; border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99,102,241,.1);
}

.btn-row { display: flex; gap: 6px; margin-top: 12px; }
.btn-row.four .btn, .btn-row.two .btn, .btn-row.three .btn { flex: 1; }

.btn {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface-alt); color: var(--text); font-size: .76rem; font-weight: 600;
  cursor: pointer; transition: background var(--transition), transform 80ms;
  text-align: center; white-space: nowrap;
}
.btn:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
.btn:active { transform: scale(.96); }

.btn-primary {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-hover); color: #fff; }

/* ── Export Modal ── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,.45); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  animation: fadeIn .2s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
  background: var(--surface); border-radius: 16px;
  box-shadow: var(--shadow-lg); width: 100%; max-width: 480px;
  max-height: 80vh; display: flex; flex-direction: column;
  animation: modalSlide .25s ease;
}
@keyframes modalSlide {
  from { opacity: 0; transform: translateY(12px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px 14px; border-bottom: 1px solid var(--border);
}
.modal-header h2 { font-size: 1.05rem; font-weight: 700; }

.modal-body {
  padding: 16px 20px; overflow-y: auto; flex: 1;
}
.modal-body .field-row { margin-bottom: 14px; }

.modal-photos {
  display: flex; flex-direction: column; gap: 8px;
}
.modal-photo-row {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: 10px;
  background: var(--surface-alt); border: 1px solid var(--border);
}
.modal-thumb {
  width: 44px; height: 44px; border-radius: 8px;
  object-fit: cover; flex-shrink: 0;
}
.modal-photo-name {
  flex: 1; font-size: .82rem; font-weight: 500; color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  min-width: 0;
}
.modal-copies-ctrl {
  display: flex; align-items: center; gap: 4px; flex-shrink: 0;
}
.modal-copies-ctrl button {
  width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-size: .9rem; font-weight: 700;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), border-color var(--transition);
}
.modal-copies-ctrl button:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }
.modal-copies-ctrl input[type="number"] {
  width: 42px; text-align: center; padding: 4px 2px; border: 1px solid var(--border);
  border-radius: 6px; font-size: .82rem; font-weight: 600;
  background: var(--surface); color: var(--text);
  -moz-appearance: textfield;
}
.modal-copies-ctrl input[type="number"]::-webkit-inner-spin-button,
.modal-copies-ctrl input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }

.modal-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-top: 1px solid var(--border); gap: 12px;
}
.modal-summary {
  font-size: .78rem; color: var(--text-2); font-weight: 500;
}

/* ── Toasts ── */
.toasts { position: fixed; bottom: 20px; right: 20px; z-index: 999; }
.toast {
  background: var(--toast-bg); color: var(--toast-fg);
  padding: 10px 20px; border-radius: 10px;
  font-size: .82rem; font-weight: 500; margin-top: 8px;
  box-shadow: var(--shadow-lg);
  animation: toastIn .3s ease; transition: opacity .25s;
}
@keyframes toastIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .header { padding: 10px 16px; }
  .editor-body { flex-direction: column; align-items: center; padding: 14px; gap: 14px; }
  .canvas-col { width: 100%; display: flex; flex-direction: column; align-items: center; }
  canvas { width: 100%; max-width: 400px; }
  .canvas-bar, .canvas-tip { max-width: 400px; width: 100%; }
  .controls { min-width: 0; width: 100%; max-width: 400px; }
  .upload-footer { flex-direction: column; align-items: center; }
}