/* ─── Theme Variables ───────────────────────────────── */
:root {
  /* Warm Light Theme */
  --accent: #e05a6f;
  --accent-hover: #c9445b;
  --accent-soft: #fde8ec;
  --green: #2a9d6e;
  --green-soft: #e4f5ed;
  --bg: #f7f5f2;
  --bg-warm: #efebe5;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --text: #1e1b18;
  --text-dim: #7a6f64;
  --text-muted: #8a7e73;
  --border: #e4ddd5;
  --border-light: #eeebe6;
  --shadow-sm: 0 1px 3px rgba(30,27,24,0.05);
  --shadow: 0 4px 16px rgba(30,27,24,0.07);
  --shadow-lg: 0 8px 32px rgba(30,27,24,0.1);
  --shadow-xl: 0 20px 50px rgba(30,27,24,0.14);
  --radius: 16px;
  --radius-sm: 10px;
  --nav-h: 64px;
  --hero-gradient: linear-gradient(145deg, #fde8ec 0%, #fef6e4 30%, #e4f5ed 65%, #e4edf8 100%);
  --grain: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  --overlay-bg: rgba(30,27,24,0.5);
  --input-bg: #f7f5f2;
  --code-bg: #efebe5;
  --celebrate-bg: linear-gradient(135deg, #fbbf24, #f59e0b);
  --celebrate-hover: linear-gradient(135deg, #f59e0b, #d97706);
}

[data-theme="dark"] {
  --accent: #f27088;
  --accent-hover: #e65878;
  --accent-soft: rgba(242,112,136,0.1);
  --green: #4fd4a0;
  --green-soft: rgba(79,212,160,0.1);
  --bg: #151311;
  --bg-warm: #1c1916;
  --surface: #221f1c;
  --surface-raised: #2a2723;
  --text: #ede8e2;
  --text-dim: #a89e94;
  --text-muted: #7a6f64;
  --border: #332e29;
  --border-light: #2a2723;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.5);
  --hero-gradient: linear-gradient(145deg, #221a1a 0%, #1e1d15 30%, #15201b 65%, #151a22 100%);
  --overlay-bg: rgba(0,0,0,0.65);
  --input-bg: #1c1916;
  --code-bg: #2a2723;
  --celebrate-bg: linear-gradient(135deg, #b45309, #92400e);
  --celebrate-hover: linear-gradient(135deg, #d97706, #b45309);
}

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

body {
  font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  transition: background 0.4s ease, color 0.4s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── Buttons ───────────────────────────────────────── */
.btn {
  padding: 9px 20px;
  border: none;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  outline: none;
  white-space: nowrap;
  letter-spacing: 0.01em;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(255,255,255,0.1), transparent);
  pointer-events: none;
  border-radius: inherit;
}

.btn-primary  { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: var(--shadow), 0 4px 20px rgba(224,90,111,0.25); }
.btn-pink     { background: var(--accent); color: #fff; }
.btn-pink:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: var(--shadow), 0 4px 20px rgba(224,90,111,0.25); }
.btn-outline  { background: transparent; border: 1.5px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-ghost    { background: transparent; color: var(--text-dim); }
.btn-ghost:hover { color: var(--text); background: var(--accent-soft); }
.btn-danger   { color: #e53935 !important; }
.btn-lg       { padding: 14px 32px; font-size: 1rem; }

.btn:active { transform: translateY(0) scale(0.98); }
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.post:focus-within .post-actions { opacity: 1; }

/* ─── Celebrate Button ─────────────────────────────── */
.btn-celebrate {
  background: var(--celebrate-bg);
  color: #fff;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  text-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.btn-celebrate:hover {
  background: var(--celebrate-hover);
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow), 0 4px 24px rgba(245,158,11,0.35);
}

.btn-celebrate:active {
  transform: translateY(0) scale(0.97);
}

.btn-celebrate.btn-sm {
  padding: 7px 16px;
  font-size: 0.82rem;
}

.celebrate-icon {
  display: inline-block;
  transition: transform 0.3s ease;
}

.btn-celebrate:hover .celebrate-icon {
  transform: scale(1.2) rotate(-10deg);
}

.btn-celebrate.celebrating {
  animation: celebratePulse 0.5s ease-in-out 3;
}

@keyframes celebratePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

/* ─── Balloons ─────────────────────────────────────── */
.balloons-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  overflow: hidden;
}

.balloon {
  position: absolute;
  bottom: -60px;
  will-change: transform, opacity;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.12));
  z-index: 9999;
}

@keyframes balloonRise {
  0% {
    transform: translateY(0) translateX(0) rotate(0deg) scale(0.3);
    opacity: 0;
  }
  8% {
    opacity: 1;
    transform: translateY(-8vh) translateX(calc(var(--drift) * 0.1)) rotate(-5deg) scale(1);
  }
  50% {
    transform: translateY(-55vh) translateX(var(--drift)) rotate(8deg) scale(1.05);
    opacity: 1;
  }
  85% {
    opacity: 0.8;
  }
  100% {
    transform: translateY(-110vh) translateX(calc(var(--drift) * 1.5)) rotate(-3deg) scale(0.9);
    opacity: 0;
  }
}

/* ─── Theme Toggle ──────────────────────────────────── */
.theme-toggle {
  width: 40px;
  height: 40px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--text-dim);
  border: 1.5px solid var(--border);
  background: var(--surface) !important;
}

.theme-toggle:hover {
  transform: rotate(30deg) scale(1.1);
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft) !important;
  box-shadow: 0 0 20px var(--accent-soft);
}

.theme-toggle svg {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-icon-light,
.theme-icon-dark {
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark { display: flex; }

/* ─── Navbar ────────────────────────────────────────── */
.navbar {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.4s ease, border-color 0.4s ease;
}

.nav-brand { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.nav-brand:hover .nav-title { color: var(--accent); }
.nav-logo  { font-size: 1.4rem; transition: transform 0.3s ease; }
.nav-brand:hover .nav-logo { transform: rotate(-12deg) scale(1.15); }
.nav-title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.3rem;
  font-weight: 700;
  font-optical-sizing: auto;
  color: var(--text);
  letter-spacing: -0.03em;
  transition: color 0.25s ease;
}
.nav-actions { display: flex; gap: 10px; align-items: center; }

/* ─── Screens ───────────────────────────────────────── */
.screen {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0; bottom: 0;
  overflow: auto;
}
.screen.active { display: block; }

/* ─── Home Screen ───────────────────────────────────── */
.home-hero {
  text-align: center;
  padding: 80px 28px 56px;
  background: var(--hero-gradient);
  position: relative;
  overflow: hidden;
  transition: background 0.4s ease;
}

.home-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(224,90,111,0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(42,157,110,0.05) 0%, transparent 50%);
  animation: heroGlow 12s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-3%, 2%) scale(1.05); }
}

.home-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grain);
  background-size: 128px;
  pointer-events: none;
  opacity: 0.4;
}

.home-hero h1 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  font-optical-sizing: auto;
  line-height: 1.12;
  margin-bottom: 20px;
  color: var(--text);
  letter-spacing: -0.04em;
  position: relative;
  z-index: 1;
}

.home-hero p {
  font-size: 1.1rem;
  color: var(--text-dim);
  margin-bottom: 40px;
  font-weight: 400;
  letter-spacing: 0.01em;
  position: relative;
  z-index: 1;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* ─── Boards Grid ───────────────────────────────────── */
.boards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 22px;
  padding: 40px 28px;
  max-width: 1200px;
  margin: 0 auto;
}

.board-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  border: 1.5px solid var(--border-light);
}

.board-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.board-card-preview {
  height: 130px;
  background: linear-gradient(135deg, var(--accent-soft), var(--green-soft));
  position: relative;
  overflow: hidden;
}

.board-card-preview .mini-post {
  position: absolute;
  width: 60px;
  height: 56px;
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
  font-size: 0.5rem;
  padding: 4px;
  overflow: hidden;
}

.board-card-info { padding: 16px 18px; }
.board-card-info h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 5px; font-family: 'Fraunces', Georgia, serif; letter-spacing: -0.01em; }
.board-card-info p  { font-size: 0.8rem; color: var(--text-dim); font-weight: 400; }

.board-card-new {
  border: 2px dashed var(--border);
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 180px;
  font-size: 2.5rem;
  color: var(--text-muted);
  transition: all 0.3s;
}

.board-card-new:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-8px);
  background: var(--accent-soft);
}

/* ─── Board Screen ──────────────────────────────────── */
.board-toolbar {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  z-index: 50;
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.4s ease, border-color 0.4s ease;
}

.board-title-wrap { flex: 1; }

.board-title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.2rem;
  font-weight: 600;
  outline: none;
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  transition: background 0.2s;
  display: inline-block;
  min-width: 80px;
  letter-spacing: -0.02em;
}

.board-title:focus { background: var(--bg-warm); }

.toolbar-actions { display: flex; gap: 8px; align-items: center; }

/* ─── Background Picker ─────────────────────────────── */
.bg-picker {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 24px;
  background: var(--bg-warm);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 400;
  transition: background 0.4s ease, border-color 0.4s ease;
}

.bg-swatches { display: flex; gap: 8px; }

.bg-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2.5px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.bg-swatch:hover { transform: scale(1.3); }
.bg-swatch.active { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* ─── Canvas ────────────────────────────────────────── */
.canvas {
  position: relative;
  width: 100%;
  height: calc(100vh - var(--nav-h) - 58px);
  overflow: hidden;
  background: var(--bg-warm);
  transition: background 0.35s;
}

.canvas.grid-bg {
  background-image: linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ─── Posts ─────────────────────────────────────────── */
.post {
  position: absolute;
  width: 200px;
  min-height: 180px;
  border-radius: 6px;
  padding: 20px 18px 16px;
  cursor: grab;
  box-shadow:
    2px 2px 8px rgba(0,0,0,0.05),
    4px 4px 20px rgba(0,0,0,0.07),
    0 0 0 1px rgba(0,0,0,0.02);
  transition: box-shadow 0.3s cubic-bezier(0.4,0,0.2,1), transform 0.3s cubic-bezier(0.4,0,0.2,1);
  user-select: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  animation: postPop 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  word-wrap: break-word;
  overflow-wrap: break-word;
  background-image:
    linear-gradient(135deg, rgba(255,255,255,0.45) 0%, rgba(255,255,255,0) 40%, rgba(0,0,0,0.02) 100%);
  background-blend-mode: overlay;
}

.post:hover {
  box-shadow:
    3px 3px 12px rgba(0,0,0,0.07),
    8px 8px 30px rgba(0,0,0,0.1),
    0 0 0 1px rgba(0,0,0,0.03);
  z-index: 10;
  transform: translateY(-4px) rotate(-0.5deg);
}

.post.dragging {
  cursor: grabbing;
  box-shadow:
    6px 6px 14px rgba(0,0,0,0.1),
    14px 14px 44px rgba(0,0,0,0.16);
  transform: rotate(2deg) scale(1.04);
  z-index: 999;
}

.post::after {
  content: '';
  position: absolute;
  bottom: 0; right: 0;
  width: 0; height: 0;
  border-style: solid;
  border-width: 0 0 16px 16px;
  border-color: transparent transparent rgba(0,0,0,0.04) transparent;
  border-radius: 0 0 3px 0;
  pointer-events: none;
}

.post-title {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 400;
  font-size: 0.95rem;
  color: rgba(0,0,0,0.82);
  line-height: 1.25;
}

.post-content {
  font-size: 0.82rem;
  color: rgba(0,0,0,0.56);
  line-height: 1.65;
  flex: 1;
  white-space: pre-wrap;
  letter-spacing: 0.01em;
  font-weight: 400;
}

.post-author {
  margin-top: auto;
  padding-top: 10px;
  display: flex;
  justify-content: flex-start;
}

.post-author-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: 4px;
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 0.6rem;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  font-weight: 600;
  color: rgba(0,0,0,0.38);
  background: rgba(0,0,0,0.04);
}

.author-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: rgba(0,0,0,0.18);
  flex-shrink: 0;
}

.post-actions {
  position: absolute;
  top: 6px; right: 6px;
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 2;
}

.post:hover .post-actions { opacity: 1; }

.post-btn {
  width: 26px; height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 7px;
  padding: 0;
  cursor: pointer;
  color: rgba(0,0,0,0.42);
  transition: all 0.2s;
}

.post-btn:hover {
  background: rgba(255,255,255,1);
  color: rgba(0,0,0,0.75);
  transform: scale(1.12);
  box-shadow: var(--shadow-sm);
}

@keyframes postPop {
  from { transform: scale(0.5); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

/* ─── List & Grid layouts ───────────────────────────── */
.canvas.layout-list .post {
  position: relative !important;
  left: auto !important; top: auto !important;
  width: 100%;
  margin-bottom: 12px;
  cursor: default;
}

.canvas.layout-grid .post { cursor: default; }

.canvas.layout-list,
.canvas.layout-grid {
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 20px;
}

.canvas.layout-grid {
  flex-direction: row;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 16px;
}

.canvas.layout-grid .post {
  position: relative !important;
  left: auto !important; top: auto !important;
}

/* ─── Modals ────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: fadeIn 0.25s;
}

.modal {
  background: var(--surface);
  border-radius: 20px;
  padding: 34px;
  width: min(480px, calc(100vw - 32px));
  box-shadow: var(--shadow-xl);
  animation: slideUp 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid var(--border-light);
  transition: background 0.4s ease, border-color 0.4s ease;
}

.modal h3 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 22px;
  color: var(--text);
  letter-spacing: -0.02em;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 7px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: var(--input-bg);
  transition: border-color 0.25s, box-shadow 0.25s;
  resize: vertical;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 10px;
}

/* ─── Layout Options ────────────────────────────────── */
.layout-options { display: flex; gap: 12px; }

.layout-opt {
  flex: 1;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 8px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--input-bg);
}

.layout-opt:hover { border-color: var(--accent); color: var(--accent); }
.layout-opt.selected { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.layout-icon { font-size: 1.4rem; margin-bottom: 4px; }

/* ─── Color Swatches ────────────────────────────────── */
.color-swatches { display: flex; gap: 10px; flex-wrap: wrap; }

.color-swatch {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm), inset 0 0 0 1px rgba(0,0,0,0.06);
}

.color-swatch:hover { transform: scale(1.25); }
.color-swatch.selected { border-color: var(--text); transform: scale(1.15); }

/* ─── Animations ────────────────────────────────────── */
@keyframes fadeIn  { from { opacity: 0 } to { opacity: 1 } }
@keyframes slideUp { from { transform: translateY(28px); opacity: 0 } to { transform: translateY(0); opacity: 1 } }

/* ─── Empty State ───────────────────────────────────── */
.empty-canvas {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  pointer-events: none;
  text-align: center;
}

.empty-canvas .empty-icon { font-size: 4rem; margin-bottom: 12px; opacity: 0.3; }
.empty-canvas p { font-size: 1rem; opacity: 0.4; font-weight: 400; }

/* ─── Footer ────────────────────────────────────────── */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  padding: 12px 20px;
  font-size: 0.72rem;
  color: var(--text-muted);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 90;
  letter-spacing: 0.04em;
  font-weight: 400;
  border-top: 1px solid var(--border-light);
  transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

.site-footer strong {
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

/* ─── Collaboration UI ──────────────────────────────── */
.collab-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--green);
  background: var(--green-soft);
  padding: 5px 14px;
  border-radius: 50px;
  font-weight: 600;
}

.collab-dot {
  width: 8px; height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* Sync Banner */
.sync-banner {
  background: var(--green-soft);
  border-bottom: 1px solid color-mix(in srgb, var(--green) 20%, transparent);
  padding: 8px 24px;
  font-size: 0.85rem;
  color: var(--green);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  transition: background 0.4s ease;
}

.sync-banner span:first-child { display: inline-flex; align-items: center; gap: 5px; }
.sync-banner .btn-sm { margin-left: auto; padding: 3px 10px; font-size: 0.78rem; }

/* Share Modal */
.modal-share { max-width: 380px; }

.modal-desc {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin-bottom: 22px;
  font-weight: 400;
  line-height: 1.55;
}

.room-code {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: 8px;
  text-align: center;
  color: var(--text);
  background: var(--code-bg);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 18px;
  font-family: 'DM Sans', monospace;
  border: 1px solid var(--border);
  transition: background 0.4s ease, border-color 0.4s ease;
}

.qr-container {
  display: flex;
  justify-content: center;
  margin-bottom: 18px;
}

.qr-container canvas,
.qr-container img {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

.copy-row { display: flex; gap: 8px; margin-bottom: 16px; }

.copy-row input {
  flex: 1;
  padding: 9px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-family: inherit;
  color: var(--text-dim);
  background: var(--input-bg);
  outline: none;
  transition: border-color 0.25s;
}

.btn-sm { padding: 7px 16px; font-size: 0.82rem; }
.btn-block { width: 100%; margin-bottom: 14px; }

.collab-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--green);
  justify-content: center;
  font-weight: 600;
}

/* Join code input */
.input-code {
  font-size: 2rem !important;
  font-weight: 800 !important;
  letter-spacing: 12px !important;
  text-align: center !important;
  font-family: 'DM Sans', monospace !important;
}

/* Error message */
.error-msg {
  background: color-mix(in srgb, #e53935 10%, var(--surface));
  border: 1px solid color-mix(in srgb, #e53935 22%, transparent);
  border-radius: var(--radius-sm);
  padding: 11px 16px;
  font-size: 0.87rem;
  color: #e53935;
  margin-bottom: 14px;
}

[data-theme="dark"] .error-msg { color: #ff6b6b; }

/* ─── Responsive ────────────────────────────────────── */
/* ─── Reduced Motion ───────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .balloon { animation: none !important; display: none !important; }
  .btn-celebrate.celebrating { animation: none !important; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

@media (max-width: 600px) {
  .navbar { padding: 0 14px; gap: 8px; }
  .nav-title { font-size: 1.05rem; }
  .nav-actions { gap: 6px; }
  .nav-actions .btn { padding: 6px 10px; font-size: 0.75rem; }
  #btnMyBoards { padding: 6px 8px; font-size: 0.7rem; }
  #btnNewBoard { padding: 6px 10px; font-size: 0.75rem; }

  .board-toolbar { flex-wrap: wrap; padding: 8px 14px; gap: 6px; }
  .board-title-wrap { flex: 1 1 auto; min-width: 0; }
  .board-title {
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    display: block;
  }
  .toolbar-actions { flex-wrap: wrap; gap: 6px; }
  .toolbar-actions .btn { padding: 5px 8px; font-size: 0.75rem; }
  .collab-badge { font-size: 0.72rem; padding: 3px 8px; }
  #btnBack { padding: 5px 8px; font-size: 0.8rem; }

  .sync-banner { padding: 6px 14px; font-size: 0.78rem; gap: 6px; }
  .bg-picker { padding: 8px 14px; gap: 8px; flex-wrap: wrap; }
  .bg-swatch { width: 24px; height: 24px; }

  .canvas {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 12px;
    gap: 12px;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    height: auto;
    min-height: calc(100vh - var(--nav-h) - 80px);
  }

  .post {
    position: relative !important;
    left: auto !important; top: auto !important;
    width: calc(100% - 8px) !important;
    max-width: 360px;
    min-height: auto;
    padding: 14px 12px 10px;
    cursor: default;
  }
  .post-title { font-size: 0.85rem; }
  .post-content { font-size: 0.78rem; }
  .post-author-tag { font-size: 0.58rem; }
  .post .post-actions { opacity: 1; }

  .empty-canvas { position: relative; }

  .home-hero { padding: 48px 18px 36px; }
  .home-hero p { font-size: 0.95rem; }
  .btn-lg { padding: 12px 24px; font-size: 0.92rem; }
  .hero-actions { gap: 10px; }
  .boards-grid { padding: 22px 18px; gap: 14px; }

  .modal { padding: 24px; border-radius: 16px; }
  .modal h3 { font-size: 1.1rem; }
  .room-code { font-size: 2rem; letter-spacing: 5px; padding: 14px; }
  .input-code { font-size: 1.5rem !important; letter-spacing: 8px !important; }

  .site-footer { padding: 8px 14px; font-size: 0.65rem; }

  .theme-toggle { width: 34px; height: 34px; }
  .theme-toggle svg { width: 15px; height: 15px; }

  .btn-celebrate { padding: 12px 20px; font-size: 0.88rem; }
}

@media (max-width: 380px) {
  .navbar { padding: 0 10px; }
  .nav-logo { font-size: 1.2rem; }
  .nav-title { font-size: 0.9rem; }
  #btnMyBoards { display: none; }
  .nav-actions .btn { padding: 5px 8px; font-size: 0.7rem; }
  .board-toolbar { padding: 6px 10px; }
  .board-title { font-size: 0.85rem; }
}