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

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

:root {
    --primary: #1a2b5f;
    --accent: #00c9a7;
    --accent-orange: #ff7e5f;
    --text-white: #ffffff;
    --text-light: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.7);
    --bg-dark: #0a0a0f;
    --bg-card: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.15);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    min-height: 100vh;
    min-height: 100dvh;
    color: var(--text-white);
    overflow: hidden;
}

.slider-container {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
}

/* Top Bar */
.top-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 32px;
    background: linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, transparent 100%);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.top-bar.hidden {
    opacity: 0;
    transform: translateY(-100%);
    pointer-events: none;
}

.back-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    color: var(--text-white);
    text-decoration: none;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.back-btn svg {
    width: 20px;
    height: 20px;
}

.top-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
    letter-spacing: 0.02em;
}

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

/* Version Toggle */
.version-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    padding: 4px;
    backdrop-filter: blur(10px);
}

.version-btn {
    padding: 8px 14px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.version-btn:hover {
    color: var(--text-light);
}

.version-btn.active {
    background: var(--text-white);
    color: var(--bg-dark);
}

.lang-toggle {
    display: flex;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    padding: 4px;
    backdrop-filter: blur(10px);
}

.lang-btn {
    padding: 8px 14px;
    border: none;
    border-radius: 100px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    color: var(--text-light);
}

.lang-btn.active {
    background: var(--text-white);
    color: var(--bg-dark);
}

/* Fullscreen Button */
.fullscreen-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    color: var(--text-white);
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.fullscreen-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.fullscreen-btn svg {
    width: 20px;
    height: 20px;
}

.fullscreen-btn .icon-compress {
    display: none;
}

.fullscreen-btn.active .icon-expand {
    display: none;
}

.fullscreen-btn.active .icon-compress {
    display: block;
}

/* Main Slider */
.slider {
    flex: 1;
    position: relative;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.slider img {
    pointer-events: none;
    -webkit-user-drag: none;
    user-select: none;
}

.slider * {
    -webkit-user-drag: none;
}

.slides-wrapper {
    position: relative;
    height: 100%;
}

.slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

/* Slide Image - Large */
.slide-image {
    position: absolute;
    top: 90px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: calc(100% - 100px);
    height: calc(100% - 260px);
    transition: top 0.3s ease, width 0.3s ease, height 0.3s ease;
}

.slide-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 20px;
    box-shadow:
        0 16px 48px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.08);
}

/* Slide Info Card - Overlay */
.slide-overlay {
    position: absolute;
    bottom: 140px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
    padding: 24px 40px;
    background: linear-gradient(135deg, rgba(20, 25, 40, 0.85) 0%, rgba(10, 15, 30, 0.9) 100%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    max-width: 600px;
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.05) inset;
    transition: bottom 0.3s ease;
}

.slide-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, var(--accent) 0%, #00a88a 100%);
    color: var(--bg-dark);
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    box-shadow: 0 2px 12px rgba(0, 201, 167, 0.3);
}

.slide-badge.ai {
    background: linear-gradient(135deg, var(--accent-orange) 0%, #ff9a7a 100%);
    box-shadow: 0 2px 12px rgba(255, 126, 95, 0.3);
}

.slide-title {
    font-size: clamp(1.35rem, 3vw, 1.85rem);
    font-weight: 700;
    color: var(--text-white);
    letter-spacing: -0.01em;
    line-height: 1.3;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.slide-desc {
    font-size: 0.95rem;
    color: var(--text-light);
    max-width: 500px;
    line-height: 1.6;
    opacity: 0.9;
}

/* Bottom Navigation */
.bottom-nav {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    backdrop-filter: blur(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.bottom-nav.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(100%);
    pointer-events: none;
}

.nav-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-btn:hover {
    color: var(--text-white);
    background: var(--border-light);
}

.nav-btn svg {
    width: 20px;
    height: 20px;
}

.dots {
    display: flex;
    align-items: center;
    gap: 8px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: var(--border-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot:hover {
    background: var(--text-muted);
}

.dot.active {
    background: var(--accent);
    width: 24px;
    border-radius: 5px;
}

/* Auto Toggle */
.auto-toggle {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
    margin-left: 4px;
    border-left: 1px solid var(--border-light);
    padding-left: 16px;
    border-radius: 0;
}

.auto-toggle:hover {
    color: var(--text-white);
}

.auto-toggle.active {
    color: var(--accent);
}

.auto-toggle svg {
    width: 16px;
    height: 16px;
}

.auto-toggle .icon-play {
    display: none;
}

.auto-toggle.active .icon-pause {
    display: block;
}

.auto-toggle.active .icon-play {
    display: none;
}

.auto-toggle:not(.active) .icon-pause {
    display: none;
}

.auto-toggle:not(.active) .icon-play {
    display: block;
}

/* Slide Transition Animation */
.slide-image img {
    opacity: 0;
    transform: scale(0.96);
    transition: opacity 0.5s ease, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide.active .slide-image img {
    opacity: 1;
    transform: scale(1);
}

.slide-overlay {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
    transition: opacity 0.6s ease 0.15s, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.15s;
}

.slide.active .slide-overlay {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* UI Hidden - Expanded view */
.slider-container.ui-hidden .slide-image {
    top: 20px;
    width: calc(100% - 40px);
    height: calc(100% - 40px);
}

.slider-container.ui-hidden .slide-overlay {
    bottom: 30px;
}

/* Responsive */
@media (max-width: 768px) {
    .top-bar {
        padding: 16px 20px;
    }

    .top-title {
        font-size: 0.9rem;
    }

    .top-controls {
        gap: 8px;
    }

    .slide-image {
        top: 75px;
        width: calc(100% - 48px);
        height: calc(100% - 240px);
    }

    .slide-overlay {
        bottom: 110px;
        padding: 18px 24px;
        max-width: 92%;
        gap: 10px;
        border-radius: 16px;
    }

    .slide-title {
        font-size: 1.2rem;
    }

    .slide-desc {
        font-size: 0.85rem;
    }

    .bottom-nav {
        bottom: 28px;
        padding: 8px 12px;
        gap: 12px;
    }

    .nav-btn {
        width: 32px;
        height: 32px;
    }

    .dots {
        gap: 6px;
    }

    .dot {
        width: 8px;
        height: 8px;
    }

    .dot.active {
        width: 20px;
    }

    .auto-toggle {
        width: 32px;
        height: 32px;
        padding-left: 12px;
    }

    .slider-container.ui-hidden .slide-image {
        top: 16px;
        width: calc(100% - 32px);
        height: calc(100% - 32px);
    }

    .slider-container.ui-hidden .slide-overlay {
        bottom: 20px;
    }
}

/* Scrollbar hidden */
::-webkit-scrollbar {
    display: none;
}