/* PostForge v3 — mobile-first PWA editor styling */

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@400;600;700;800;900&family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
  --bg: #020617;
  --bg-card: #0f172a;
  --bg-elev: #1e293b;
  --border: #334155;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --text-soft: #cbd5e1;
  --accent: #60a5fa;
  --accent-dark: #1d4ed8;
  --success: #10b981;
  --gold: #fde68a;
  --radius: 14px;
}

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

html, body { background: var(--bg); color: var(--text); }
body {
  font-family: 'Cairo', 'Inter', -apple-system, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  padding-bottom: env(safe-area-inset-bottom);
}

button { font-family: inherit; cursor: pointer; }
input, textarea, select {
  font-family: inherit;
  font-size: 16px;
  width: 100%;
  background: var(--bg-elev);
  color: var(--text);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  outline: none;
  transition: border-color .15s;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); }
textarea { resize: vertical; min-height: 70px; }
label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 16px 0 6px;
}
label .hint { color: var(--text-dim); font-weight: 400; text-transform: none; font-size: 12px; letter-spacing: 0; }

#app {
  display: grid;
  grid-template-rows: auto 1fr auto auto auto;
  min-height: 100vh;
  max-width: 1400px;
  margin: 0 auto;
}

/* ── Top bar ─────────────────────────────────────────────────────── */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  background: linear-gradient(180deg, #0c1a3d 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { height: 38px; width: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 18px; font-weight: 900; color: white; letter-spacing: -0.4px; }
.brand-text span { font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1.5px; }

.topbar-actions { display: flex; gap: 10px; }
.icon-btn {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  color: var(--text);
  width: 42px; height: 42px;
  border-radius: 12px;
  font-size: 20px;
  display: grid; place-items: center;
  transition: all .15s;
}
.icon-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.icon-btn.install { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.hidden { display: none !important; }

/* ── Canvas preview ─────────────────────────────────────────────── */
.canvas-area {
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: radial-gradient(ellipse at center, var(--bg-card) 0%, var(--bg) 100%);
}
.canvas-frame {
  position: relative;
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px var(--border);
  display: grid; place-items: center;
}
.canvas-frame .preview-img {
  width: 100%; height: 100%;
  object-fit: contain;
  display: block;
  background: #1e293b;
}
.canvas-frame.portrait { aspect-ratio: 1080 / 1350; }
.canvas-frame.story { aspect-ratio: 9 / 16; max-width: 280px; }
.canvas-frame.landscape { aspect-ratio: 1200 / 627; }

.canvas-loading {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  background: rgba(2, 6, 23, 0.85);
  color: white;
  z-index: 5;
  gap: 12px;
  flex-direction: column;
  display: none;
}
.canvas-loading.active { display: flex; }
.spinner {
  width: 40px; height: 40px;
  border: 3px solid rgba(255,255,255,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.canvas-meta {
  display: flex;
  gap: 14px;
  font-size: 12px;
  color: var(--text-dim);
  font-family: 'Inter', monospace;
  letter-spacing: 0.5px;
}

/* ── Tabs ──────────────────────────────────────────────────────── */
.tabs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  position: sticky;
  bottom: 0;
  z-index: 8;
}
.tab {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 10px 4px;
  font-size: 22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  border-top: 3px solid transparent;
  transition: all .15s;
}
.tab span {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}
.tab.active {
  color: var(--accent);
  background: rgba(96, 165, 250, 0.08);
  border-top-color: var(--accent);
}

/* ── Panels ────────────────────────────────────────────────────── */
.panels {
  padding: 18px 18px 0;
  background: var(--bg);
  min-height: 240px;
}
.panel { display: none; }
.panel.active { display: block; animation: panelIn .25s ease-out; }
@keyframes panelIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.panel h3 {
  font-size: 18px; font-weight: 900;
  margin-bottom: 12px;
  color: white;
}
.panel h4 {
  font-size: 14px; font-weight: 800;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 1px;
  margin: 18px 0 8px;
}
.panel .hint { font-size: 13px; color: var(--text-dim); margin-bottom: 12px; }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.search-input { margin-bottom: 14px; }

.course-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 280px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.course-item {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: all .12s;
}
.course-item:hover, .course-item.active {
  border-color: var(--accent);
  background: rgba(96, 165, 250, 0.08);
}
.course-item-code {
  font-family: 'Inter', monospace;
  font-weight: 900;
  font-size: 13px;
  letter-spacing: 1px;
  background: var(--bg-elev);
  padding: 4px 9px;
  border-radius: 6px;
  color: var(--accent);
  flex-shrink: 0;
}
.course-item-name {
  font-size: 14px;
  font-weight: 600;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}
.brand-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 14px 12px;
  cursor: pointer;
  transition: all .12s;
  text-align: center;
}
.brand-card:hover, .brand-card.active {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.brand-card.active { box-shadow: 0 0 0 2px var(--accent); }
.brand-card-swatch {
  height: 30px;
  border-radius: 8px;
  margin-bottom: 8px;
}
.brand-card-name { font-weight: 800; font-size: 14px; }
.brand-card-tag { font-size: 11px; color: var(--text-dim); margin-top: 2px; }

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 8px;
  margin-top: 10px;
}
.photo-thumb {
  aspect-ratio: 1 / 1;
  border-radius: 10px;
  background-size: cover;
  background-position: center;
  cursor: pointer;
  border: 2.5px solid transparent;
  transition: all .12s;
  position: relative;
}
.photo-thumb:hover { transform: scale(1.04); }
.photo-thumb.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.4); }

.upload-btn {
  display: block;
  background: var(--bg-card);
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
  cursor: pointer;
  font-weight: 700;
  margin-bottom: 8px;
  transition: all .12s;
}
.upload-btn:hover { border-color: var(--accent); color: var(--accent); }
.upload-btn input { display: none; }

.ghost-btn {
  background: transparent;
  color: var(--text-dim);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  width: 100%;
  font-weight: 700;
  font-size: 14px;
  margin-top: 8px;
}
.ghost-btn:hover { color: var(--text); border-color: var(--text-dim); }

.seg-control {
  display: flex;
  background: var(--bg-elev);
  border-radius: 12px;
  padding: 4px;
  gap: 4px;
}
.seg-control button {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 10px 8px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 13px;
  transition: all .12s;
}
.seg-control button.active {
  background: var(--accent);
  color: var(--bg);
}

/* ── Action bar ────────────────────────────────────────────────── */
.actions {
  position: sticky;
  bottom: 0;
  padding: 14px 18px calc(14px + env(safe-area-inset-bottom)) 18px;
  background: linear-gradient(0deg, var(--bg) 50%, transparent 100%);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  z-index: 7;
  border-top: 1px solid var(--border);
}
.actions button {
  padding: 16px;
  border-radius: 14px;
  font-weight: 900;
  font-size: 15px;
  border: none;
  letter-spacing: 0.3px;
  transition: all .12s;
}
.actions .primary {
  background: var(--accent);
  color: var(--bg);
}
.actions .primary:hover { background: #93c5fd; }
.actions .secondary {
  background: var(--gold);
  color: var(--bg);
}
.actions .secondary:hover { background: #fef3c7; }

/* ── Desktop layout — sidebar + canvas ────────────────────────── */
@media (min-width: 900px) {
  #app {
    grid-template-areas:
      "topbar    topbar"
      "canvas    sidebar"
      "actions   actions";
    grid-template-columns: 1fr 420px;
    grid-template-rows: auto 1fr auto;
    height: 100vh;
    max-width: none;
  }
  .topbar { grid-area: topbar; }
  .canvas-area { grid-area: canvas; overflow-y: auto; }
  .canvas-frame { max-width: 600px; }
  .canvas-frame.story { max-width: 380px; }
  .tabs {
    grid-area: sidebar;
    position: static;
    border-right: 1px solid var(--border);
    border-top: none;
    grid-template-columns: 1fr;
    grid-auto-rows: 64px;
    align-self: start;
    border-bottom: 1px solid var(--border);
  }
  .tab { flex-direction: row; gap: 12px; justify-content: flex-start; padding: 0 18px; border-top: none; border-right: 3px solid transparent; }
  .tab.active { border-top: none; border-right-color: var(--accent); }
  .panels {
    grid-area: sidebar;
    overflow-y: auto;
    margin-top: 320px;  /* leave room for tabs above */
    height: calc(100vh - 64px - 320px - 80px);
  }
  /* On desktop, side panels stack below tabs in same column */
  #app { grid-template-rows: auto 1fr auto; }
  .actions { grid-area: actions; max-width: 600px; margin-left: auto; }
}