/* ─────────────────────────────────────────────────────────
   Postcard Generator — Mobile-first stylesheet
   Palette: deep ink navy + warm sand + coral accent
   Type: system serif for headings, system sans for UI
   ───────────────────────────────────────────────────────── */

:root {
  --ink:        #1b1f2e;
  --ink-mid:    #3d4259;
  --sand:       #f2ede6;
  --sand-dark:  #e4ddd4;
  --coral:      #c95c3b;
  --coral-lt:   #e8795a;
  --white:      #ffffff;
  --border:     #d0cbc3;
  --shadow:     0 2px 12px rgba(27,31,46,.12);
  --radius:     10px;
  --font-ui:    -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-ui);
  background: var(--sand);
  color: var(--ink);
  min-height: 100vh;
  line-height: 1.5;
}

/* ── Header ─────────────────────────────────────────────── */
.site-header {
  background: var(--ink);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.site-header .logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--sand);
  letter-spacing: .01em;
}
.site-header .logo span { color: var(--coral-lt); }

/* ── Layout ─────────────────────────────────────────────── */
.app-wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 16px 60px;
}

/* ── Step indicator ─────────────────────────────────────── */
.steps {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.step-tab {
  flex: 1;
  padding: 10px 8px;
  text-align: center;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--ink-mid);
  background: var(--white);
  border: none;
  cursor: default;
  transition: background .2s, color .2s;
  text-transform: uppercase;
  border-right: 1px solid var(--border);
}
.step-tab:last-child { border-right: none; }
.step-tab.active {
  background: var(--ink);
  color: var(--sand);
}
.step-tab.done {
  background: var(--sand-dark);
  color: var(--ink-mid);
}

/* ── Section cards ──────────────────────────────────────── */
.section-card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 20px;
  margin-bottom: 16px;
}
.section-card h2 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--ink);
  margin-bottom: 14px;
}

/* ── Category filter ────────────────────────────────────── */
.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
  min-height: 0; /* collapses when empty while templates load */
}
.category-filter:empty { margin-bottom: 0; }

.cat-btn {
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--sand);
  color: var(--ink-mid);
  font-family: var(--font-ui);
  font-size: .78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
.cat-btn:hover  { border-color: var(--coral-lt); color: var(--coral); }
.cat-btn.active {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--white);
}

/* ── Template grid ──────────────────────────────────────── */
.template-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
@media (min-width: 560px) {
  .template-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 768px) {
  .template-grid { grid-template-columns: repeat(4, 1fr); }
}

.template-card {
  border: 2px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color .18s, box-shadow .18s;
  background: var(--sand);
}
.template-card:hover  { border-color: var(--coral-lt); box-shadow: var(--shadow); }
.template-card.active { border-color: var(--coral);    box-shadow: 0 0 0 2px var(--coral); }

.template-thumb {
  width: 100%;
  aspect-ratio: 3/2;
  display: block;
  object-fit: cover;
}
.template-thumb-canvas {
  width: 100%;
  aspect-ratio: 3/2;
  display: block;
}
.template-label {
  padding: 6px 8px;
  font-size: .75rem;
  font-weight: 600;
  color: var(--ink-mid);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Text fields ────────────────────────────────────────── */
.text-field-group { display: flex; flex-direction: column; gap: 14px; }

.field-row label {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  color: var(--ink-mid);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.field-row input[type="text"],
.field-row textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 9px 12px;
  font-family: var(--font-serif);
  font-size: .95rem;
  color: var(--ink);
  background: var(--sand);
  resize: vertical;
  transition: border-color .15s;
  -webkit-appearance: none;
}
.field-row input[type="text"]:focus,
.field-row textarea:focus {
  outline: none;
  border-color: var(--coral);
  background: var(--white);
}
.field-row textarea { min-height: 72px; }

/* ── Photo upload ───────────────────────────────────────── */
.photo-upload-area {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color .18s, background .18s;
  background: var(--sand);
}
.photo-upload-area:hover,
.photo-upload-area.drag-over {
  border-color: var(--coral);
  background: #fdf7f4;
}
.photo-upload-area p  { font-size: .88rem; color: var(--ink-mid); margin-top: 6px; }
.photo-upload-area small { font-size: .75rem; color: #999; }
#photo-preview-wrap {
  margin-top: 12px;
  display: none;
}
#photo-preview-wrap img {
  max-width: 100%;
  max-height: 160px;
  border-radius: 6px;
  border: 1px solid var(--border);
  object-fit: cover;
}
.btn-remove-photo {
  display: inline-block;
  margin-top: 6px;
  font-size: .78rem;
  color: var(--coral);
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 0;
  text-decoration: underline;
}

/* ── Canvas preview ─────────────────────────────────────── */
.canvas-wrap {
  width: 100%;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #111;
  position: relative;
}
#postcard-canvas {
  display: block;
  width: 100%;
  height: auto;
}
.canvas-overlay-msg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(27,31,46,.55);
  color: var(--sand);
  font-size: .9rem;
  border-radius: 8px;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s;
}
.canvas-overlay-msg.show { opacity: 1; }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 11px 22px;
  border-radius: 7px;
  font-family: var(--font-ui);
  font-size: .9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background .18s, transform .1s;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(.97); }

.btn-primary {
  background: var(--coral);
  color: var(--white);
}
.btn-primary:hover { background: var(--coral-lt); }

.btn-secondary {
  background: var(--sand-dark);
  color: var(--ink);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--border); }

.btn-outline {
  background: transparent;
  color: var(--coral);
  border: 2px solid var(--coral);
}
.btn-outline:hover { background: #fdf7f4; }

.btn-full { width: 100%; }

.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ── Download bar ───────────────────────────────────────── */
.download-bar {
  background: var(--ink);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
  margin-top: 16px;
}
.download-bar p {
  color: var(--sand);
  font-size: .88rem;
}
.download-bar .btn-primary {
  font-size: 1rem;
  padding: 13px 30px;
}

/* ── Toast ──────────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: var(--sand);
  padding: 10px 20px;
  border-radius: 30px;
  font-size: .85rem;
  opacity: 0;
  transition: opacity .25s, transform .25s;
  pointer-events: none;
  white-space: nowrap;
  z-index: 9999;
  box-shadow: 0 4px 20px rgba(0,0,0,.25);
}
#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Loading spinner ────────────────────────────────────── */
.spinner {
  width: 28px; height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--coral);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin: 20px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Utility ────────────────────────────────────────────── */
.hidden { display: none !important; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.text-sm { font-size: .82rem; color: var(--ink-mid); }
.text-center { text-align: center; }

/* ── Admin link ─────────────────────────────────────────── */
.admin-link {
  display: block;
  text-align: right;
  font-size: .72rem;
  color: var(--border);
  text-decoration: none;
  padding: 4px 0;
}
.admin-link:hover { color: var(--sand-dark); }

/* ── Reduced motion ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}