/* ============================================================
   Foundation-AI Slide Viewer — viewer.css
   ============================================================ */

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

html, body {
    width: 100%;
    height: 100%;
    background-color: #070d1a;
    font-family: 'Roboto Mono', monospace;
    color: #a3a3a3;
    overflow: hidden;
}

/* ── Shell Layout ─────────────────────────────────────────── */
#viewer-shell {
    display: flex;
    flex-direction: column;
    width: 100vw;
    height: 100vh;
}

/* ── Top Bar ──────────────────────────────────────────────── */
#top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    padding: 0 32px;
    background-color: #0a1020;
    border-bottom: 1px solid #1a2540;
    flex-shrink: 0;
}

#deck-title {
    font-family: 'Oswald', sans-serif;
    font-size: 18px;
    color: #f5f5f5;
    letter-spacing: 1px;
    text-transform: uppercase;
}

#slide-counter {
    font-size: 14px;
    color: #00e5ff;
    letter-spacing: 2px;
}

/* ── Stage (iframe area) ──────────────────────────────────── */
#stage {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #070d1a;
    overflow: hidden;
    padding: 16px 0 8px;
}

#slide-frame {
    width: 1280px;
    height: 720px;
    border: none;
    display: block;
    transform-origin: center center;
    background-color: #121212;
    box-shadow: 0 8px 48px rgba(0, 229, 255, 0.08), 0 2px 16px rgba(0,0,0,0.6);
}

/* ── Bottom Controls ──────────────────────────────────────── */
#controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    padding: 0 24px;
    background-color: #0a1020;
    border-top: 1px solid #1a2540;
    flex-shrink: 0;
    gap: 16px;
}

.nav-btn {
    font-family: 'Roboto Mono', monospace;
    font-size: 14px;
    font-weight: 700;
    color: #00e5ff;
    background: transparent;
    border: 1px solid #00e5ff;
    padding: 10px 24px;
    cursor: pointer;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: background-color 0.15s, color 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
}

.nav-btn:hover {
    background-color: #00e5ff;
    color: #070d1a;
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

/* ── Thumbnail Strip ──────────────────────────────────────── */
#thumbnail-strip {
    display: flex;
    align-items: center;
    gap: 6px;
    overflow-x: auto;
    flex: 1;
    padding: 4px 8px;
    scrollbar-width: thin;
    scrollbar-color: #1a2540 transparent;
}

#thumbnail-strip::-webkit-scrollbar {
    height: 4px;
}
#thumbnail-strip::-webkit-scrollbar-track {
    background: transparent;
}
#thumbnail-strip::-webkit-scrollbar-thumb {
    background-color: #1a2540;
    border-radius: 2px;
}

.thumb {
    flex-shrink: 0;
    width: 80px;
    height: 45px;
    background-color: #121212;
    border: 1px solid #1a2540;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Oswald', sans-serif;
    font-size: 14px;
    color: #555;
    transition: border-color 0.15s, color 0.15s;
    letter-spacing: 1px;
}

.thumb:hover {
    border-color: #00e5ff;
    color: #00e5ff;
}

.thumb.active {
    border-color: #00e676;
    color: #00e676;
    background-color: #0a1a10;
}

/* ── Responsive Scaling ───────────────────────────────────── */
@media (max-width: 1340px) {
    #stage {
        padding: 8px 0 4px;
    }
}