/* ===========================
   HTMLab v2 — Clean Cards
   =========================== */

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

:root {
  --bg:        #f4f3f0;
  --bg-card:   #ffffff;
  --border:    rgba(0,0,0,0.07);
  --border-md: rgba(0,0,0,0.12);
  --text-1:    #1a1a1a;
  --text-2:    #666660;
  --text-3:    #aaa;
  --font-ui:   'Syne', sans-serif;
  --font-code: 'JetBrains Mono', monospace;
}

html, body {
  min-height: 100%;
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--font-ui);
  font-size: 14px;
}

/* ── HEADER ─────────────────── */

.header {
  background: #fff;
  border-bottom: 1px solid var(--border-md);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
}

.logo-icon {
  width: 30px; height: 30px;
  background: #1a1a1a;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 15px;
}

.logo-text {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--text-1);
}

.header-divider {
  width: 1px; height: 18px;
  background: var(--border-md);
}

.header-sub {
  color: var(--text-2);
  font-size: 13px;
}

.header-count {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-3);
  font-family: var(--font-code);
}

/* ── MAIN ───────────────────── */

.main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 36px 28px 80px;
}

.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
}

/* ── GALLERY ────────────────── */

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

/* ── LOADING ────────────────── */

.loading {
  grid-column: 1/-1;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-2);
  padding: 48px 0;
  font-size: 13px;
}

.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--border-md);
  border-top-color: #1a1a1a;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── CARD ───────────────────── */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  cursor: pointer;
  transition: box-shadow 0.18s, transform 0.18s, border-color 0.18s;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
}

.card:hover {
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
  transform: translateY(-2px);
  border-color: var(--border-md);
}

.card-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.3;
}

.card-desc {
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.5;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.card-file {
  font-family: var(--font-code);
  font-size: 10.5px;
  color: var(--text-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}

.card-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: 6px 14px;
  cursor: pointer;
  transition: opacity 0.15s;
  flex-shrink: 0;
}

.card-btn:hover { opacity: 0.85; }

/* ── ERROR ──────────────────── */

.error-state {
  grid-column: 1/-1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-2);
}

.error-state h2 { color: var(--text-1); margin-bottom: 10px; }
.error-state code {
  font-family: var(--font-code);
  font-size: 12px;
  background: #f0f0ed;
  border: 1px solid var(--border-md);
  padding: 2px 7px;
  border-radius: 4px;
}

/* ── VIEWER ─────────────────── */

.viewer {
  position: fixed;
  inset: 0;
  background: #f4f3f0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.28s cubic-bezier(0.4,0,0.2,1);
}

.viewer.open { transform: translateY(0); }

.viewer-bar {
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  border-bottom: 1px solid var(--border-md);
  background: #fff;
  flex-shrink: 0;
  gap: 16px;
}

.viewer-bar-left  { display: flex; align-items: center; gap: 12px; min-width: 0; }
.viewer-bar-right { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }

.btn-back {
  display: flex;
  align-items: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--border-md);
  border-radius: 7px;
  color: var(--text-2);
  font-family: var(--font-ui);
  font-size: 13px;
  padding: 5px 12px;
  cursor: pointer;
  transition: all 0.12s;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-back:hover { background: var(--bg); color: var(--text-1); }

.viewer-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.view-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text-2);
  width: 30px; height: 30px;
  border-radius: 6px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.12s;
}
.view-btn:hover { background: var(--bg); color: var(--text-1); }
.view-btn.active { color: #1a1a1a; background: #e8e8e4; border-color: var(--border-md); }

.btn-open {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #1a1a1a;
  border: none;
  border-radius: 7px;
  color: #fff;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  text-decoration: none;
  transition: opacity 0.12s;
  margin-left: 6px;
}
.btn-open:hover { opacity: 0.8; }

.viewer-frame {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #e8e8e4;
  overflow: hidden;
}

.viewer-frame[data-view="desktop"] { padding: 0; background: #fff; }
.viewer-frame[data-view="tablet"]  { padding: 24px; }
.viewer-frame[data-view="mobile"]  { padding: 32px; }

#preview-iframe {
  border: none;
  background: #fff;
  transition: width 0.2s, border-radius 0.2s, box-shadow 0.2s;
}

.viewer-frame[data-view="desktop"] #preview-iframe {
  width: 100%; height: 100%; border-radius: 0; box-shadow: none;
}
.viewer-frame[data-view="tablet"] #preview-iframe {
  width: 768px; max-width: 100%; height: 100%;
  border-radius: 10px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.15);
}
.viewer-frame[data-view="mobile"] #preview-iframe {
  width: 390px; max-width: 100%; height: 100%;
  border-radius: 14px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.18);
}

/* ── RESPONSIVE ─────────────── */

@media (max-width: 600px) {
  .header-sub, .header-divider { display: none; }
  .main { padding: 24px 16px 60px; }
  .gallery { grid-template-columns: 1fr; }
}