:root {
    --green: #1f5c46;
    --green-dark: #0f2e23;
    --gold: #c9a227;
    --gold-light: #e6c869;
    --bg: #0b0f0d;
    --panel: rgba(15, 22, 19, 0.72);
    --panel-border: rgba(201, 162, 39, 0.35);
    --text: #f3ede0;
    --transition-fast: .25s cubic-bezier(.4,0,.2,1);
    --transition-slide: .7s cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg);
    font-family: 'Cairo', 'Segoe UI', Tahoma, sans-serif;
    color: var(--text);
    -webkit-tap-highlight-color: transparent;
}

/* ===== Loader ===== */
.loader {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    background: radial-gradient(circle at 50% 40%, #14332a 0%, #070a08 75%);
    transition: opacity .6s ease, visibility .6s ease;
}
.loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.loader-mark {
    width: 64px;
    height: 64px;
    color: var(--gold);
    animation: pulse 1.6s ease-in-out infinite;
}
.loader-arch {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: currentColor;
    stroke-width: 6;
    stroke-linecap: round;
}
.loader p {
    margin: 0;
    font-size: 14px;
    color: #cbb98a;
    letter-spacing: .5px;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: .8; }
    50% { transform: scale(1.12); opacity: 1; }
}

/* ===== Stage ===== */
.stage {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(31, 92, 70, 0.35), transparent 60%),
        radial-gradient(ellipse at 50% 100%, rgba(201, 162, 39, 0.12), transparent 55%),
        #050706;
    overflow: hidden;
}

.slides-layer {
    position: absolute;
    inset: 0;
}

.slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(6px, 2vh, 34px) clamp(6px, 2vw, 34px);
    opacity: 0;
    transform: scale(0.96);
    transition: opacity var(--transition-slide), transform var(--transition-slide);
    z-index: 1;
    will-change: opacity, transform;
}
.slide.active {
    opacity: 1;
    transform: scale(1) translateX(0);
    z-index: 2;
}
.slide.from-right { transform: scale(0.96) translateX(9%); }
.slide.from-left { transform: scale(0.96) translateX(-9%); }

.slide-media {
    position: relative;
    /* يختار العرض الأصغر بين عرض الشاشة الكامل وما يوازي ارتفاعها بنسبة 16:9،
       فيبقى المحتوى كاملاً وبدون أي قصّ مهما كان شكل الشاشة (جوال بوضع عمودي مثلاً).
       السطر الثاني (dvh) يُطبَّق فقط في المتصفحات الحديثة التي تدعمه ليعالج تغيّر
       ارتفاع الشاشة الفعلي على الجوال عند إخفاء/إظهار شريط العنوان. */
    width: min(100%, calc(100vh * 16 / 9));
    width: min(100%, calc(100dvh * 16 / 9));
    height: auto;
    aspect-ratio: 16 / 9;
    max-height: 100%;
    margin: 0 auto;
    box-shadow: 0 30px 80px rgba(0,0,0,.55), 0 4px 20px rgba(0,0,0,.4);
    border-radius: 6px;
    overflow: hidden;
    background: #12140f;
}
.slide-media img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transform: scale(1);
}
.slide.active .slide-media img {
    animation: kenburns 10s ease-in-out forwards;
}
@keyframes kenburns {
    from { transform: scale(1); }
    to { transform: scale(1.045); }
}

.vignette {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 5;
    background: linear-gradient(to top, rgba(0,0,0,.55) 0%, rgba(0,0,0,0) 14%),
                linear-gradient(to bottom, rgba(0,0,0,.35) 0%, rgba(0,0,0,0) 10%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.stage.controls-visible .vignette { opacity: 1; }

/* ===== Autoplay progress ===== */
.autoplay-progress {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 3px;
    background: rgba(255,255,255,.08);
    z-index: 20;
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.autoplay-progress.visible { opacity: 1; }
.autoplay-progress span {
    display: block;
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--gold), var(--gold-light));
}
.autoplay-progress.animating span {
    transition: width linear;
}

/* ===== Corner buttons ===== */
.corner-btn {
    position: absolute;
    top: 20px;
    z-index: 20;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--panel-border);
    background: var(--panel);
    backdrop-filter: blur(6px);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), background var(--transition-fast);
    pointer-events: none;
}
.stage.controls-visible .corner-btn {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.corner-btn:hover {
    background: rgba(31, 92, 70, 0.55);
    border-color: var(--gold);
}
.corner-btn svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.corner-btn-grid { right: 20px; }
.corner-btn-fullscreen { left: 20px; }

/* ===== Toolbar ===== */
.toolbar {
    position: absolute;
    bottom: 22px;
    left: 50%;
    transform: translateX(-50%) translateY(0);
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 16px;
    border-radius: 999px;
    background: var(--panel);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(10px);
    opacity: 0;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    pointer-events: none;
}
.stage.controls-visible .toolbar {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.nav-btn, .play-btn {
    width: 38px;
    height: 38px;
    flex: 0 0 auto;
    border-radius: 50%;
    border: 1px solid transparent;
    background: rgba(255,255,255,.06);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform .15s ease;
}
.nav-btn:hover, .play-btn:hover {
    background: var(--green);
    border-color: var(--gold);
}
.nav-btn:active, .play-btn:active { transform: scale(.92); }
.nav-btn svg, .play-btn svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.2;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.play-btn .icon-play { fill: currentColor; }
.play-btn .icon-pause rect { fill: currentColor; stroke: none; }

.toolbar-center {
    display: flex;
    align-items: center;
    gap: 12px;
}

.dots {
    display: flex;
    align-items: center;
    gap: 6px;
    max-width: 46vw;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 2px;
}
.dots::-webkit-scrollbar { display: none; }
.dot {
    flex: 0 0 auto;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,.28);
    border: none;
    cursor: pointer;
    padding: 0;
    transition: background var(--transition-fast), width var(--transition-fast), transform var(--transition-fast);
}
.dot:hover { background: rgba(255,255,255,.55); }
.dot.active {
    width: 22px;
    border-radius: 5px;
    background: var(--gold);
}

.counter {
    font-size: 13px;
    color: #d8cfa9;
    font-weight: 600;
    min-width: 44px;
    text-align: center;
    direction: ltr;
    letter-spacing: .5px;
}
.counter-sep { margin: 0 3px; opacity: .5; }

/* ===== Grid / slide sorter overlay ===== */
.grid-overlay {
    position: fixed;
    inset: 0;
    z-index: 50;
    background: rgba(6, 9, 8, 0.97);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    transform: scale(1.02);
    transition: opacity .35s ease, transform .35s ease, visibility .35s ease;
}
.grid-overlay.open {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}
.grid-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px clamp(16px, 4vw, 48px) 10px;
    flex: 0 0 auto;
}
.grid-header h2 {
    margin: 0;
    font-size: 20px;
    color: var(--gold-light);
    font-weight: 800;
}
.grid-close {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--panel-border);
    background: var(--panel);
    color: var(--text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}
.grid-close:hover { background: var(--green); border-color: var(--gold); }
.grid-close svg {
    width: 18px; height: 18px;
    fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round;
}

.grid-body {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: 10px clamp(16px, 4vw, 48px) 40px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 20px;
}
.grid-item {
    cursor: pointer;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid rgba(255,255,255,.08);
    background: #10120f;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
    position: relative;
}
.grid-item:hover { transform: translateY(-4px); border-color: var(--gold); }
.grid-item.current { border-color: var(--gold-light); box-shadow: 0 0 0 2px var(--gold-light); }
.grid-item img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    display: block;
}
.grid-item-num {
    position: absolute;
    top: 6px;
    right: 8px;
    background: rgba(0,0,0,.6);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 999px;
    direction: ltr;
}

/* ===== Responsive ===== */
@media (max-width: 720px) {
    .toolbar { gap: 8px; padding: 8px 10px; bottom: 12px; }
    .dots { max-width: 34vw; }
    .corner-btn { width: 36px; height: 36px; top: 12px; }
    .corner-btn-grid { right: 12px; }
    .corner-btn-fullscreen { left: 12px; }
    .grid-body { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
    .slide, .slide-media img, .loader-mark { transition: none !important; animation: none !important; }
}