/* ==================== RESET & BASE ==================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: linear-gradient(135deg, #0a0a0f 0%, #1a1025 50%, #0f0a15 100%);
    color: #ffffff;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

/* ==================== STAR FIELD BACKGROUND ==================== */
body::before,
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -10;
}

/* Small stars */
body::before {
    background-image:
        /* White stars */
        radial-gradient(1px 1px at 10% 20%, rgba(255, 255, 255, 0.9) 0%, transparent 100%),
        radial-gradient(1px 1px at 20% 50%, rgba(255, 255, 255, 0.7) 0%, transparent 100%),
        radial-gradient(1px 1px at 30% 10%, rgba(255, 255, 255, 0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 40% 80%, rgba(255, 255, 255, 0.8) 0%, transparent 100%),
        radial-gradient(1px 1px at 50% 30%, rgba(255, 255, 255, 0.5) 0%, transparent 100%),
        radial-gradient(1px 1px at 60% 70%, rgba(255, 255, 255, 0.7) 0%, transparent 100%),
        radial-gradient(1px 1px at 70% 15%, rgba(255, 255, 255, 0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 80% 45%, rgba(255, 255, 255, 0.8) 0%, transparent 100%),
        radial-gradient(1px 1px at 90% 85%, rgba(255, 255, 255, 0.5) 0%, transparent 100%),
        radial-gradient(1px 1px at 15% 65%, rgba(255, 255, 255, 0.7) 0%, transparent 100%),
        radial-gradient(1px 1px at 5% 40%, rgba(255, 255, 255, 0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 95% 25%, rgba(255, 255, 255, 0.8) 0%, transparent 100%),
        radial-gradient(1px 1px at 35% 55%, rgba(255, 255, 255, 0.5) 0%, transparent 100%),
        radial-gradient(1px 1px at 75% 92%, rgba(255, 255, 255, 0.7) 0%, transparent 100%),
        radial-gradient(1px 1px at 45% 8%, rgba(255, 255, 255, 0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 85% 62%, rgba(255, 255, 255, 0.8) 0%, transparent 100%),
        radial-gradient(1px 1px at 25% 38%, rgba(255, 255, 255, 0.5) 0%, transparent 100%),
        radial-gradient(1px 1px at 65% 78%, rgba(255, 255, 255, 0.7) 0%, transparent 100%),
        /* Bright purple stars */
        radial-gradient(1.5px 1.5px at 12% 42%, rgba(180, 50, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 88% 18%, rgba(190, 60, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 52% 78%, rgba(200, 70, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 25% 90%, rgba(170, 40, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 68% 32%, rgba(185, 55, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 42% 15%, rgba(195, 65, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 95% 55%, rgba(175, 45, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 8% 72%, rgba(180, 50, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 78% 88%, rgba(190, 60, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 32% 5%, rgba(185, 55, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 58% 48%, rgba(200, 70, 255, 1) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 82% 35%, rgba(175, 45, 255, 1) 0%, transparent 100%);
    animation: twinkle 4s ease-in-out infinite;
}

/* Larger accent stars */
body::after {
    background-image:
        radial-gradient(2.5px 2.5px at 8% 35%, rgba(180, 50, 255, 1) 0%, transparent 100%),
        radial-gradient(2.5px 2.5px at 92% 72%, rgba(170, 40, 255, 1) 0%, transparent 100%),
        radial-gradient(2.5px 2.5px at 38% 88%, rgba(190, 60, 255, 1) 0%, transparent 100%),
        radial-gradient(2.5px 2.5px at 72% 8%, rgba(185, 55, 255, 1) 0%, transparent 100%),
        radial-gradient(3px 3px at 22% 62%, rgba(175, 45, 255, 1) 0%, transparent 100%),
        radial-gradient(3px 3px at 78% 38%, rgba(195, 65, 255, 1) 0%, transparent 100%),
        radial-gradient(2.5px 2.5px at 55% 48%, rgba(180, 50, 255, 1) 0%, transparent 100%),
        radial-gradient(3px 3px at 15% 22%, rgba(165, 35, 255, 1) 0%, transparent 100%),
        radial-gradient(2.5px 2.5px at 85% 82%, rgba(190, 60, 255, 1) 0%, transparent 100%),
        radial-gradient(3px 3px at 48% 12%, rgba(180, 50, 255, 1) 0%, transparent 100%),
        radial-gradient(2.5px 2.5px at 62% 95%, rgba(185, 55, 255, 1) 0%, transparent 100%),
        radial-gradient(3px 3px at 5% 58%, rgba(175, 45, 255, 1) 0%, transparent 100%),
        radial-gradient(2.5px 2.5px at 95% 42%, rgba(195, 65, 255, 1) 0%, transparent 100%),
        radial-gradient(3px 3px at 35% 75%, rgba(170, 40, 255, 1) 0%, transparent 100%),
        radial-gradient(2.5px 2.5px at 28% 18%, rgba(200, 70, 255, 1) 0%, transparent 100%),
        radial-gradient(3px 3px at 68% 65%, rgba(180, 50, 255, 1) 0%, transparent 100%);
    animation: twinkle 5s ease-in-out infinite reverse;
}

@keyframes twinkle {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

/* ==================== HEADER ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 40px;
    z-index: 100;
}

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

.logo {
    width: 48px;
    height: 48px;
    mix-blend-mode: lighten;
}

.logo-text {
    font-size: 27px;
    font-weight: 600;
    color: #fff;
}

.header-cta {
    padding: 15px 30px;
    background: #fff;
    border: none;
    border-radius: 100px;
    color: #0a0a0a;
    font-size: 21px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.header-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.15);
}

.chrome-logo {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    vertical-align: middle;
}

.header-cta .chrome-logo {
    width: 24px;
    height: 24px;
}

.cta-button .chrome-logo {
    width: 20px;
    height: 20px;
}

/* ==================== SLIDES ==================== */
.slides-container {
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.slides-wrapper {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide {
    width: 100vw;
    height: 100vh;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 60px 100px;
    overflow: hidden;
}

.slide-content {
    max-width: 800px;
    text-align: center;
}

.video-backdrop {
    background: #000000 !important;
    border-radius: 24px;
    width: 666px;
    height: 500px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    z-index: 10;
    transform: translateZ(0);
    will-change: transform;
}

.video-backdrop::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000000;
    z-index: 1;
}

.feature-video {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(180, 50, 255, 0.2);
    object-fit: contain;
    position: relative;
    z-index: 2;
    background: #000000;
    opacity: 1;
}

/* ==================== TYPOGRAPHY ==================== */
h1 {
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 500;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 32px;
}

h2 {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -0.5px;
    margin-bottom: 24px;
}

.subtitle {
    font-size: clamp(18px, 2.5vw, 24px);
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

.description {
    font-size: clamp(16px, 2vw, 20px);
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== FEATURE SLIDES ==================== */
.feature-number {
    font-size: 14px;
    font-weight: 600;
    color: #10B981;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.feature-visual {
    margin-top: 48px;
    background: #000000 !important;
    border-radius: 24px;
    padding: 0;
    isolation: isolate;
    position: relative;
    z-index: 100;
    transform: translateZ(0);
}

.feature-visual::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #000000 !important;
    border-radius: 24px;
    z-index: 1;
}

.placeholder-animation {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 16 / 10;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.3);
    font-size: 14px;
}

/* ==================== CTA SLIDE ==================== */
.slide-cta .slide-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 40px;
    padding: 18px 36px;
    background: #fff;
    color: #0a0a0a;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 100px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(255, 255, 255, 0.1);
}

/* ==================== NAVIGATION ==================== */
.slide-nav {
    position: fixed;
    right: 40px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    z-index: 100;
}

.nav-arrow {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-arrow:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.nav-arrow:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

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

.nav-dots {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-dot {
    width: 8px;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-dot:hover {
    background: rgba(255, 255, 255, 0.4);
}

.nav-dot.active {
    background: #fff;
    height: 24px;
    border-radius: 4px;
}

/* ==================== SCROLL HINT ==================== */
.scroll-hint {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
    animation: bounce 2s ease-in-out infinite;
    transition: opacity 0.3s ease;
    z-index: -5;
}

.scroll-hint.hidden {
    opacity: 0;
    pointer-events: none;
}

.scroll-hint svg {
    width: 20px;
    height: 20px;
}

@keyframes bounce {
    0%, 100% {
        opacity: 0.4;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 0.8;
        transform: translateX(-50%) translateY(5px);
    }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .header {
        padding: 16px 24px;
    }

    .slide {
        padding: 100px 24px 120px;
    }

    .nav-arrow {
        width: 40px;
        height: 40px;
    }

    .nav-arrow svg {
        width: 18px;
        height: 18px;
    }

    .slide-nav {
        gap: 16px;
        right: 24px;
    }

    .cta-button {
        padding: 16px 28px;
        font-size: 15px;
    }

    .placeholder-animation {
        max-width: 100%;
    }

    .scroll-hint {
        bottom: 32px;
    }
}

@media (max-width: 480px) {
    h1 {
        letter-spacing: -1px;
    }

    h2 {
        letter-spacing: -0.5px;
    }

    .header-cta {
        padding: 8px 16px;
        font-size: 13px;
    }

    .nav-dots {
        gap: 6px;
    }

    .nav-dot {
        width: 6px;
        height: 6px;
    }

    .nav-dot.active {
        height: 20px;
    }
}

/* ==================== VOLUME TOGGLE ==================== */
.video-container {
    position: relative;
    background: #0a0a0f;
    border-radius: 24px;
}

.volume-toggle {
    position: absolute;
    bottom: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.volume-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.volume-icon {
    width: 20px;
    height: 20px;
}