/**
 * HE Slides - Frontend Styles
 * 
 * Styles for the presentation display on the frontend.
 */

/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */
.presentation-slides {
    --ps-bg: #1a1a2e;
    --ps-fg: #ffffff;
    --ps-accent: #004e90;
    --ps-accent-hover: #003d73;
    --ps-nav-bg: rgba(0, 78, 144, 0.9);
    --ps-nav-hover: rgba(0, 61, 115, 1);
    --ps-dot-size: 10px;
    --ps-dot-gap: 8px;
    --ps-transition: 0s;
    --ps-slide-padding: clamp(24px, 5vw, 60px);
}

/* ==========================================================================
   Main Container
   ========================================================================== */
.presentation-slides {
    position: relative;
    width: 100%;
    background: var(--ps-bg);
    color: var(--ps-fg);
    border-radius: 12px;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
}

/* Aspect Ratio Variants */
.presentation-slides-ratio-16-9 {
    aspect-ratio: 16 / 9;
}

.presentation-slides-ratio-4-3 {
    aspect-ratio: 4 / 3;
}

.presentation-slides-ratio-1-1 {
    aspect-ratio: 1 / 1;
}

/* ==========================================================================
   Slides Wrapper
   ========================================================================== */
.presentation-slides-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

/* ==========================================================================
   Individual Slide
   ========================================================================== */
.presentation-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    z-index: 1;
    background: #ffffff;
    color: #1a1a2e;
}

.presentation-slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.presentation-slide-inner {
    width: 100%;
    height: 100%;
    padding: var(--ps-slide-padding);
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: auto;
    box-sizing: border-box;
}

/* Slide Typography */
.presentation-slide h1,
.presentation-slide h2,
.presentation-slide h3,
.presentation-slide h4,
.presentation-slide h5,
.presentation-slide h6 {
    margin-top: 0;
    margin-bottom: 0.5em;
    line-height: 1.2;
}

.presentation-slide h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
.presentation-slide h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
.presentation-slide h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

.presentation-slide p {
    font-size: clamp(1rem, 2vw, 1.375rem);
    line-height: 1.6;
    margin-bottom: 1em;
}

.presentation-slide ul,
.presentation-slide ol {
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.8;
    padding-left: 1.5em;
}

.presentation-slide img {
    max-width: 100%;
    max-height: 70vh;
    height: auto;
    border-radius: 8px;
}

/* ==========================================================================
   Navigation Arrows
   ========================================================================== */
.presentation-nav {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 10;
}

.presentation-nav-prev,
.presentation-nav-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ps-nav-bg);
    border: none;
    border-radius: 50%;
    color: #ffffff;
    cursor: pointer;
    pointer-events: auto;
    transition: background 0.2s ease, transform 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.presentation-nav-prev {
    left: 16px;
}

.presentation-nav-next {
    right: 16px;
}

.presentation-nav-prev:hover,
.presentation-nav-next:hover {
    background: var(--ps-nav-hover);
    transform: translateY(-50%) scale(1.05);
}

.presentation-nav-prev:focus,
.presentation-nav-next:focus {
    outline: 2px solid var(--ps-accent);
    outline-offset: 2px;
}

.presentation-nav-prev.hidden,
.presentation-nav-next.hidden {
    opacity: 0;
    pointer-events: none;
}

.presentation-nav-prev svg,
.presentation-nav-next svg {
    width: 24px;
    height: 24px;
}

/* ==========================================================================
   Dot Indicators
   ========================================================================== */
.presentation-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--ps-dot-gap);
    z-index: 10;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.presentation-dot {
    width: var(--ps-dot-size);
    height: var(--ps-dot-size);
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    padding: 0;
    transition: background 0.2s ease, transform 0.2s ease;
}

.presentation-dot:hover {
    background: rgba(255, 255, 255, 0.7);
    transform: scale(1.2);
}

.presentation-dot.active {
    background: #004e90;
    transform: scale(1.2);
}

.presentation-dot:focus {
    outline: 2px solid var(--ps-accent);
    outline-offset: 2px;
}

/* ==========================================================================
   Controls Bar
   ========================================================================== */
.presentation-controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 8px;
    z-index: 10;
}

.presentation-fullscreen,
.presentation-overview-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ps-nav-bg);
    border: none;
    border-radius: 8px;
    color: #ffffff;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.presentation-fullscreen:hover,
.presentation-overview-btn:hover {
    background: var(--ps-nav-hover);
    transform: scale(1.05);
}

.presentation-fullscreen:focus,
.presentation-overview-btn:focus {
    outline: 2px solid var(--ps-accent);
    outline-offset: 2px;
}

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

/* ==========================================================================
   Fullscreen Mode
   ========================================================================== */
.presentation-slides.is-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    border-radius: 0;
    z-index: 999999;
    aspect-ratio: auto;
}

.presentation-slides.is-fullscreen .presentation-slides-wrapper {
    height: 100%;
}

.presentation-slides.is-fullscreen .presentation-slide-inner {
    max-width: 1400px;
    margin: 0 auto;
}

.presentation-slides.is-fullscreen .presentation-nav-prev,
.presentation-slides.is-fullscreen .presentation-nav-next {
    width: 64px;
    height: 64px;
}

.presentation-slides.is-fullscreen .presentation-nav-prev {
    left: 32px;
}

.presentation-slides.is-fullscreen .presentation-nav-next {
    right: 32px;
}

.presentation-slides.is-fullscreen .presentation-dots {
    bottom: 32px;
}

.presentation-slides.is-fullscreen .presentation-controls {
    bottom: 32px;
    right: 32px;
}

/* ==========================================================================
   Overview Mode (Grid)
   ========================================================================== */
.presentation-slides.is-overview {
    overflow: auto;
}

.presentation-slides.is-overview .presentation-slides-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    padding: 40px;
    height: auto;
    min-height: 100%;
    background: #1a1a2e;
}

.presentation-slides.is-overview .presentation-slide {
    position: relative;
    opacity: 1;
    visibility: visible;
    aspect-ratio: 16 / 9;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    background: #ffffff;
}

.presentation-slides.is-overview .presentation-slide:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.presentation-slides.is-overview .presentation-slide.active {
    box-shadow: 0 0 0 4px #004e90, 0 8px 24px rgba(0, 0, 0, 0.4);
}

.presentation-slides.is-overview .presentation-slide-inner {
    transform: scale(0.5);
    transform-origin: top left;
    width: 200%;
    height: 200%;
    pointer-events: none;
}

.presentation-slides.is-overview .presentation-nav,
.presentation-slides.is-overview .presentation-dots {
    display: none;
}

.presentation-slides.is-overview .presentation-controls {
    position: fixed;
    bottom: 32px;
    right: 32px;
}

/* Slide number badge in overview */
.presentation-slides.is-overview .presentation-slide::after {
    content: attr(data-slide-index);
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: #004e90;
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 4px;
    pointer-events: none;
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */
@media (max-width: 768px) {
    .presentation-slides {
        --ps-slide-padding: 20px;
    }

    .presentation-nav-prev,
    .presentation-nav-next {
        width: 40px;
        height: 40px;
    }

    .presentation-nav-prev {
        left: 8px;
    }

    .presentation-nav-next {
        right: 8px;
    }

    .presentation-dots {
        bottom: 12px;
        --ps-dot-size: 8px;
        --ps-dot-gap: 6px;
    }

    .presentation-controls {
        bottom: 12px;
        right: 12px;
    }

    .presentation-fullscreen,
    .presentation-overview-btn {
        width: 36px;
        height: 36px;
    }

    .presentation-slides.is-overview .presentation-slides-wrapper {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 12px;
        padding: 20px;
    }
}

/* Always show controls - no fade effect */
.presentation-nav-prev.hidden,
.presentation-nav-next.hidden {
    opacity: 0 !important;
    pointer-events: none !important;
}

/* Print styles */
@media print {
    .presentation-slides {
        page-break-inside: avoid;
    }

    .presentation-slide {
        position: relative;
        opacity: 1;
        visibility: visible;
        page-break-after: always;
        height: auto;
        min-height: 100vh;
    }

    .presentation-nav,
    .presentation-dots,
    .presentation-controls {
        display: none !important;
    }
}