/* ============================================================
   Scottish Castles PWA — app.css  v4.0
   Design: atmospheric Highlands dusk palette
   Signature: region-tinted photo grid with editorial castle detail
   ============================================================ */

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

:root {
  --midnight:   #08090d;
  --granite:    #111827;
  --loch:       #1e2d3d;
  --water:      #4e8fad;
  --water-dim:  rgba(78,143,173,.18);
  --sandstone:  #c4a882;
  --parchment:  #faf8f4;
  --ink:        #1c1a17;
  --dust:       #7a7570;
  --fog:        rgba(255,255,255,.06);
  --veil:       rgba(255,255,255,.10);
  --safe-t: env(safe-area-inset-top,0px);
  --safe-b: env(safe-area-inset-bottom,0px);
}

html,body { height:100%; overflow:hidden; background:var(--midnight); }
body { font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",sans-serif;
       -webkit-font-smoothing:antialiased; }

#app { width:100vw; max-width:430px; height:100dvh; position:relative; overflow:hidden; background:var(--midnight); margin:0 auto; }

/* ── Splash ── */
.app-splash {
  position:absolute; inset:0; display:flex; flex-direction:column;
  align-items:center; justify-content:center; gap:16px; background:var(--midnight);
}
.app-splash-icon { font-size:3rem; filter:drop-shadow(0 0 24px rgba(78,143,173,.5)); }
.app-splash-text { font-size:.75rem; font-weight:700; letter-spacing:.2em;
  text-transform:uppercase; color:var(--water); }

/* ── Screens ── */
.screen {
  position:absolute; inset:0; display:flex; flex-direction:column;
  transform:translateX(102%);
  transition:transform .38s cubic-bezier(.32,.72,.33,1);
  will-change:transform; overflow:hidden;
}
.screen.active  { transform:translateX(0); }
.screen.behind  { transform:translateX(-22%); }

/* ═══════════════════════════════════════════════════════
   HOME — atmospheric map
═══════════════════════════════════════════════════════ */
#screen-home {
  background:
    radial-gradient(ellipse 70% 55% at 18% 28%, rgba(30,45,61,.9) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 80%, rgba(10,20,30,.7) 0%, transparent 60%),
    var(--midnight);
}

.home-header {
  flex:0 0 auto;
  padding: calc(var(--safe-t) + 52px) 22px 16px;
}
.home-title {
  font-size:1.7rem; font-weight:800; letter-spacing:-.03em; color:#fff;
  line-height:1;
}
.home-subtitle {
  font-size:.72rem; color:var(--water); margin-top:4px;
  font-weight:600; letter-spacing:.06em; text-transform:uppercase;
}

.home-map-wrap {
  flex:1; display:flex; align-items:center; justify-content:center;
  padding:4px 8px 0; position:relative; overflow:hidden;
}
.home-map-wrap svg { max-width:100%; max-height:100%; filter:drop-shadow(0 8px 32px rgba(0,0,0,.5)); }

.region-shape { cursor:pointer; -webkit-tap-highlight-color:transparent; }
.region-shape polygon, .region-shape path {
  stroke-linejoin:round;
  transition:filter .18s ease;
}
.region-shape:active polygon,
.region-shape:active path { filter:brightness(1.35) saturate(1.2); }

.region-badge-bg { pointer-events:none; }
.region-badge-text {
  pointer-events:none; font-size:10px; font-weight:800;
  text-anchor:middle; dominant-baseline:central; fill:#fff;
}
.region-name-label {
  pointer-events:none; font-size:8.5px; font-weight:700;
  text-anchor:middle; fill:rgba(255,255,255,.82);
  paint-order:stroke; stroke:rgba(0,0,0,.25); stroke-width:3px;
}

.home-footer {
  flex:0 0 auto; padding:10px 0 calc(var(--safe-b) + 18px);
  text-align:center; font-size:.65rem; letter-spacing:.12em;
  text-transform:uppercase; color:rgba(255,255,255,.25);
}
.home-indicator {
  width:112px; height:4px; border-radius:99px;
  background:rgba(255,255,255,.15); margin:10px auto 0;
}

/* ═══════════════════════════════════════════════════════
   REGION — 2-column photo grid
═══════════════════════════════════════════════════════ */
#screen-region { background:var(--midnight); }

.region-header {
  flex:0 0 auto;
  padding: calc(var(--safe-t) + 14px) 18px 14px;
  background:linear-gradient(to bottom, rgba(8,9,13,.98) 70%, transparent);
  position:relative; z-index:10;
}
.region-nav {
  display:flex; align-items:center; gap:12px;
}
.nav-btn {
  width:36px; height:36px; border:0; border-radius:99px;
  background:var(--fog); backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px);
  border:1px solid var(--veil);
  display:grid; place-items:center; color:#fff; font-size:1.2rem;
  cursor:pointer; flex:0 0 auto; -webkit-tap-highlight-color:transparent;
  transition:background .15s;
}
.nav-btn:active { background:var(--veil); }
.nav-btn svg { display:block; }
.region-header-title {
  font-size:1.5rem; font-weight:800; letter-spacing:-.025em; color:#fff; flex:1;
}
.region-header-count { font-size:.7rem; color:var(--water); font-weight:600;
  letter-spacing:.06em; text-transform:uppercase; margin-top:1px; }

.castle-grid {
  flex:1; overflow-y:auto; -webkit-overflow-scrolling:touch;
  display:grid; grid-template-columns:1fr 1fr;
  gap:6px; padding:6px 6px calc(var(--safe-b) + 20px);
  align-content:start;
}

.castle-card {
  aspect-ratio:2/3; border-radius:18px; overflow:hidden;
  position:relative; cursor:pointer; background:var(--granite);
  -webkit-tap-highlight-color:transparent;
  transition:transform .15s ease, opacity .15s;
}
.castle-card:active { transform:scale(.97); opacity:.9; }

.castle-card-img {
  width:100%; height:100%; object-fit:cover; display:block;
  object-position:center 70%;
  transition:opacity .3s;
}
.castle-card--wide { grid-column:span 2; aspect-ratio:16/9; }

.castle-card-gradient {
  position:absolute; inset:0;
  background:linear-gradient(to top,
    rgba(0,0,0,.92) 0%,
    rgba(0,0,0,.55) 35%,
    rgba(0,0,0,.15) 60%,
    transparent 80%);
}
.castle-card-info {
  position:absolute; bottom:0; left:0; right:0; padding:16px 14px 18px;
}
.castle-card-title {
  font-size:.95rem; font-weight:800; color:#fff; letter-spacing:-.01em;
  line-height:1.2;
  text-shadow:0 2px 8px rgba(0,0,0,.8), 0 1px 2px rgba(0,0,0,.9);
}

/* ═══════════════════════════════════════════════════════
   CASTLE DETAIL — cinematic
═══════════════════════════════════════════════════════ */
#screen-castle { background:var(--parchment); }

.castle-scroll { flex:1; overflow-y:auto; -webkit-overflow-scrolling:touch; }

.castle-hero {
  height:52vh; min-height:280px; max-height:420px;
  position:relative; background:var(--loch); overflow:hidden; flex:0 0 auto;
}
.castle-hero-img { width:100%; height:100%; object-fit:cover; display:block; }
.castle-hero-overlay {
  position:absolute; inset:0;
  background:linear-gradient(
    to bottom,
    rgba(0,0,0,.38) 0%,
    transparent 38%,
    rgba(0,0,0,.25) 75%,
    rgba(0,0,0,.55) 100%);
}
.castle-hero-btns {
  position:absolute; z-index:5;
  top:calc(var(--safe-t) + 12px); left:0; right:0;
  display:flex; justify-content:space-between; padding:0 16px;
}
.hero-btn {
  width:38px; height:38px; border:0; border-radius:99px;
  background:rgba(0,0,0,.36); backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px); border:1px solid rgba(255,255,255,.15);
  display:grid; place-items:center; color:#fff;
  cursor:pointer; -webkit-tap-highlight-color:transparent;
  font-size:1rem; transition:background .15s;
}
.hero-btn:active { background:rgba(0,0,0,.55); }
.hero-btn svg { display:block; }

.castle-eyebrow {
  position:absolute; left:18px; bottom:56px; z-index:5;
  font-size:.65rem; font-weight:700; letter-spacing:.14em; text-transform:uppercase;
  color:rgba(255,255,255,.7);
}
.castle-hero-title-overlay {
  position:absolute; left:18px; right:18px; bottom:18px; z-index:5;
  font-size:1.8rem; font-weight:800; letter-spacing:-.03em; color:#fff;
  line-height:1.08; text-shadow:0 2px 12px rgba(0,0,0,.5);
}

.castle-body {
  background:var(--parchment);
  padding:20px 20px calc(var(--safe-b) + 40px);
  border-radius:24px 24px 0 0;
  margin-top:-24px; position:relative; z-index:2;
}

.castle-action-row {
  display:flex; gap:8px; margin-bottom:20px;
}
.castle-btn {
  flex:1; border:0; border-radius:14px; padding:12px 8px;
  display:flex; align-items:center; justify-content:center; gap:7px;
  font-size:.8rem; font-weight:700; cursor:pointer;
  -webkit-tap-highlight-color:transparent; transition:opacity .15s;
  letter-spacing:.01em;
}
.castle-btn:active { opacity:.7; }
.castle-btn--nav {
  background:var(--ink); color:#fff;
}
.castle-btn--map {
  background:var(--water-dim); color:var(--water);
  border:1px solid rgba(78,143,173,.25);
}
.castle-btn svg { flex:0 0 auto; }

/* Article content */
.castle-content {
  font-size:.9rem; line-height:1.78; color:#3d3a34;
  margin-bottom:8px;
}
.castle-content p { margin-bottom:.85em; }
.castle-content h2 { font-size:1.05rem; font-weight:700; margin:1.5em 0 .4em; color:var(--ink); }
.castle-content h3 { font-size:.95rem; font-weight:700; margin:1.3em 0 .35em; color:var(--ink); }
.castle-content h4 { font-size:.88rem; font-weight:700; margin:1.1em 0 .3em; color:var(--ink); }
.castle-content ul, .castle-content ol { padding-left:1.4em; margin-bottom:.85em; }
.castle-content li { margin-bottom:.3em; }
.castle-content strong { font-weight:700; }
.castle-content a { color:var(--water); text-underline-offset:2px; }
.castle-content img {
  width:100%; height:auto; border-radius:14px; margin:.8em 0; display:block;
}
.castle-content figure { margin:.8em 0; }
.castle-content figcaption {
  font-size:.7rem; color:var(--dust); text-align:center; margin-top:5px;
  font-style:italic;
}
.castle-loading {
  color:var(--dust); font-size:.85rem; font-style:italic; padding:4px 0;
}

/* Section divider */
.cs-divider {
  display:flex; align-items:center; gap:10px;
  margin:24px 0 12px;
}
.cs-divider-line { flex:1; height:1px; background:rgba(28,26,23,.1); }
.cs-divider-label {
  font-size:.65rem; font-weight:800; letter-spacing:.12em;
  text-transform:uppercase; color:var(--dust); white-space:nowrap;
}

/* Location map */
.castle-map-frame {
  border-radius:18px; overflow:hidden;
  border:1px solid rgba(28,26,23,.08);
  box-shadow:0 4px 20px rgba(15,23,42,.08);
}
.castle-map-frame iframe { display:block; width:100%; height:230px; border:0; }
.castle-map-link {
  display:flex; align-items:center; justify-content:center; gap:6px;
  margin-top:10px; padding:11px;
  font-size:.8rem; font-weight:700; color:var(--water);
  text-decoration:none; border-radius:12px;
  background:var(--water-dim);
}

/* Nearby */
.nearby-card {
  display:flex; align-items:center; gap:12px;
  padding:10px 13px; margin-top:8px;
  background:#fff; border-radius:16px;
  box-shadow:0 1px 6px rgba(15,23,42,.06);
  cursor:pointer; -webkit-tap-highlight-color:transparent;
  transition:opacity .15s;
}
.nearby-card:active { opacity:.7; }
.nearby-thumb {
  width:48px; height:48px; border-radius:10px; object-fit:cover;
  flex:0 0 auto; background:var(--loch);
}
.nearby-title { font-size:.85rem; font-weight:650; display:block; color:var(--ink); }
.nearby-region { font-size:.7rem; color:var(--dust); }
.nearby-go { margin-left:auto; color:#c4beb2; font-size:1.1rem; }

/* BMaC */
.bmac-section {
  margin-top:26px; padding:18px;
  background:linear-gradient(135deg,rgba(196,168,130,.12),rgba(196,168,130,.06));
  border-radius:18px; border:1px solid rgba(196,168,130,.2);
  text-align:center;
}
.bmac-section p { font-size:.78rem; color:var(--dust); margin-bottom:11px; line-height:1.5; }
.bmac-btn {
  display:inline-block; text-decoration:none;
  background:#FFDD00; color:var(--ink);
  font-size:.82rem; font-weight:800; letter-spacing:.01em;
  padding:10px 22px; border-radius:99px;
  box-shadow:0 2px 10px rgba(255,221,0,.3);
}

/* Error */
.app-error {
  position:absolute; inset:0; display:flex; flex-direction:column;
  align-items:center; justify-content:center; gap:14px;
  padding:32px; text-align:center; background:var(--midnight);
}
.app-error h2 { font-size:1.2rem; font-weight:700; color:#fff; }
.app-error p { font-size:.82rem; color:rgba(255,255,255,.55); line-height:1.6; }
.app-error code {
  font-family:monospace; font-size:.75rem;
  background:var(--granite); color:var(--water);
  padding:2px 7px; border-radius:5px;
}

@media (prefers-reduced-motion:reduce) { .screen { transition:none; } }