/* =============================================================
   postcard.css · "Save-the-Date Postcard Studio"
   A live canvas keepsake generator — guests type a greeting,
   pick a palette + a stamp motif, and watch a procedurally
   drawn Lucknow postcard update in real time before downloading
   a PNG. Namespaced under .postcard__ so it drops into the
   cascade cleanly. Only the :root tokens from style.css are used;
   the JS derives a couple of tints/shades from those hex values
   for the palette presets, nothing new is invented here.
   ============================================================= */

.postcard {
  background: linear-gradient(180deg, var(--cream), var(--cream-2));
}

.postcard__head {
  max-width: 720px;
  margin: 0 auto clamp(2.5rem, 5vw, 3.5rem);
  text-align: center;
}

.postcard__intro {
  margin-top: 1.1rem;
  font-size: clamp(1.05rem, 2.2vw, 1.2rem);
  font-style: italic;
  font-weight: 300;
  color: var(--ink-soft);
}

/* ---------- Layout: preview + controls side by side ---------- */
.postcard__stage {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: start;
}

/* ---------- Preview column ---------- */
.postcard__preview {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
}

.postcard__canvas-wrap {
  position: relative;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  background: var(--charcoal);
  padding: 0;
  overflow: hidden;
  /* classic postcard ratio, roughly 3:2 landscape */
  aspect-ratio: 3 / 2;
}

.postcard__canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.postcard__canvas-fallback {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  font-style: italic;
  color: var(--cream);
  background: linear-gradient(165deg, #38302a, var(--charcoal));
}
.postcard--no-canvas .postcard__canvas { display: none; }
.postcard--no-canvas .postcard__canvas-fallback { display: flex; }

.postcard__counter {
  margin-top: 0.9rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.postcard__counter strong { color: var(--gold-deep); font-weight: 500; }

/* ---------- Controls column ---------- */
.postcard__panel {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: clamp(1.8rem, 4vw, 2.5rem);
  box-shadow: var(--shadow-sm);
}

.postcard__field {
  margin-bottom: 1.5rem;
}
.postcard__field:last-child { margin-bottom: 0; }

.postcard__label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.6rem;
}

.postcard__field textarea,
.postcard__field input[type="text"] {
  width: 100%;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--ink);
  background: var(--cream-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.8rem 1rem;
  resize: vertical;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}
.postcard__field textarea {
  min-height: 4.4rem;
  line-height: 1.5;
}
.postcard__field textarea:focus,
.postcard__field input[type="text"]:focus {
  outline: none;
  border-color: var(--gold-deep);
  background: var(--cream);
}

.postcard__field-foot {
  display: flex;
  justify-content: flex-end;
  margin-top: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}
.postcard__field-foot.is-near-limit { color: var(--terracotta); }

/* ---------- Palette swatches ---------- */
.postcard__swatches {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.7rem;
}

.postcard__swatch {
  position: relative;
}
.postcard__swatch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.postcard__swatch span {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}
.postcard__swatch-dot {
  flex: 0 0 auto;
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  border: 1px solid rgba(43, 38, 34, 0.2);
}
.postcard__swatch:hover span { border-color: var(--gold); }
.postcard__swatch input:checked + span {
  border-color: var(--gold-deep);
  background: var(--cream-2);
  box-shadow: 0 0 0 1px var(--gold-deep) inset;
}
.postcard__swatch input:focus-visible + span {
  outline: 2px solid var(--gold-deep);
  outline-offset: 2px;
}

/* ---------- Motif chips ---------- */
.postcard__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.postcard__chip { position: relative; }
.postcard__chip input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.postcard__chip span {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
}
.postcard__chip:hover span { border-color: var(--gold); color: var(--ink); }
.postcard__chip input:checked + span {
  background: var(--gold-deep);
  border-color: var(--gold-deep);
  color: var(--cream);
}
.postcard__chip input:focus-visible + span {
  outline: 2px solid var(--gold-deep);
  outline-offset: 2px;
}

/* ---------- Toggle ---------- */
.postcard__toggle {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  cursor: pointer;
}
.postcard__toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.postcard__toggle-track {
  flex: 0 0 auto;
  position: relative;
  width: 2.6rem;
  height: 1.5rem;
  border-radius: 100px;
  background: var(--line);
  transition: background 0.3s var(--ease-out);
}
.postcard__toggle-track::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 50%;
  background: var(--cream);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease-out);
}
.postcard__toggle input:checked ~ .postcard__toggle-track {
  background: var(--gold-deep);
}
.postcard__toggle input:checked ~ .postcard__toggle-track::before {
  transform: translateX(1.1rem);
}
.postcard__toggle input:focus-visible ~ .postcard__toggle-track {
  outline: 2px solid var(--gold-deep);
  outline-offset: 2px;
}
.postcard__toggle-label {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--ink);
}

/* ---------- Actions ---------- */
.postcard__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.9rem;
}
.postcard__actions .btn { flex: 1 1 auto; justify-content: center; }

.postcard__hint {
  margin-top: 1rem;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  color: var(--ink-soft);
  font-style: italic;
}

.postcard__noscript {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
  color: var(--ink-soft);
  font-style: italic;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .postcard__stage { grid-template-columns: 1fr; }
  .postcard__preview { position: static; }
}

@media (max-width: 480px) {
  .postcard__panel { padding: 1.5rem 1.2rem; border-radius: 14px; }
  .postcard__swatches { grid-template-columns: 1fr; }
  .postcard__actions { flex-direction: column; }
  .postcard__actions .btn { width: 100%; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .postcard__swatch span,
  .postcard__chip span,
  .postcard__toggle-track,
  .postcard__toggle-track::before,
  .postcard__field textarea,
  .postcard__field input[type="text"] {
    transition: none !important;
  }
}