/* ==========================================================================
   Cinematic Welcome Popup — Premium dark theme
   ========================================================================== */

:root {
    --color-bg: #0a0a0f;
    --color-bg-alt: #12121a;
    --color-surface: #1a1a28;
    --color-text: #e8e8f0;
    --color-text-muted: #9898b0;
    --color-accent: #00d4ff;
    --color-accent-secondary: #7b2ff7;
    --color-glow: rgba(0, 212, 255, 0.6);
    --color-glow-purple: rgba(123, 47, 247, 0.5);
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-overlay: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    width: 100%;
    height: 100%;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    width: 100%;
    min-height: 100%;
}

html.overlay-active,
html.overlay-active body {
    overflow: hidden !important;
    width: 100% !important;
    height: 100% !important;
    position: fixed !important;
    inset: 0 !important;
    overscroll-behavior: none !important;
    touch-action: none !important;
}

body.overlay-active {
    overflow: hidden !important;
}

body.overlay-active .homepage {
    visibility: hidden !important;
    pointer-events: none !important;
    user-select: none !important;
}

/* --------------------------------------------------------------------------
   Homepage
   -------------------------------------------------------------------------- */

.homepage {
    min-height: 100vh;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.site-logo {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 1.25rem;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    text-shadow: 0 0 20px var(--color-glow);
}

.site-nav {
    display: flex;
    gap: 2rem;
}

.site-nav a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color var(--transition-smooth), text-shadow var(--transition-smooth);
}

.site-nav a:hover {
    color: var(--color-accent);
    text-shadow: 0 0 12px var(--color-glow);
}

.hero {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 85vh;
    padding: 4rem 2rem;
    text-align: center;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--color-glow-purple) 0%, transparent 70%);
    opacity: 0.3;
    filter: blur(80px);
    pointer-events: none;
    animation: heroGlowPulse 6s ease-in-out infinite;
}

@keyframes heroGlowPulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.15); opacity: 0.45; }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.hero-text {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-muted);
    max-width: 560px;
    margin-bottom: 2.5rem;
    font-weight: 300;
    position: relative;
    z-index: 1;
}

.hero-cta {
    display: inline-block;
    padding: 0.875rem 2.5rem;
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    border-radius: 2px;
    background: transparent;
    transition: all var(--transition-smooth);
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.hero-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
    opacity: 0;
    transition: opacity var(--transition-smooth);
    z-index: -1;
}

.hero-cta:hover {
    color: #fff;
    border-color: transparent;
    box-shadow: 0 0 30px var(--color-glow), 0 0 60px var(--color-glow-purple);
    transform: translateY(-2px);
}

.hero-cta:hover::before {
    opacity: 1;
}

.hero-cta--secondary {
    margin-top: 1rem;
}

.section {
    padding: 5rem 2rem;
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}

.section-alt {
    background: var(--color-bg-alt);
    max-width: none;
}

.section-alt > h2,
.section-alt > .feature-grid {
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.section h2 {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.section p {
    color: var(--color-text-muted);
    font-size: 1.125rem;
    max-width: 640px;
    margin: 0 auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    padding: 0 2rem;
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    padding: 2rem;
    text-align: left;
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 24px rgba(0, 212, 255, 0.1);
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
    color: var(--color-accent);
}

.feature-card p {
    font-size: 1rem;
    margin: 0;
    text-align: left;
}

.site-footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   Cinematic Overlay
   -------------------------------------------------------------------------- */

.cinematic-overlay {
    position: fixed;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    min-width: 100vw;
    min-height: 100vh;
    min-height: 100dvh;
    max-width: none;
    max-height: none;
    margin: 0 !important;
    z-index: 2147483647;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    overflow: hidden;
    isolation: isolate;
    transition: opacity var(--transition-overlay), visibility var(--transition-overlay);
    background: #000;
}

.cinematic-overlay.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.cinematic-overlay.is-locked {
    cursor: default;
    user-select: none;
    -webkit-user-select: none;
}

.cinematic-overlay.is-locked:focus {
    outline: none;
}

.cinematic-overlay.is-hiding {
    opacity: 0;
    visibility: visible;
    pointer-events: none;
}

/* Fullscreen API active state */
:fullscreen,
:-webkit-full-screen {
    background: #000;
}

/* When the page root enters system fullscreen, overlay must fill it */
html:fullscreen .cinematic-overlay,
html:-webkit-full-screen .cinematic-overlay,
body:fullscreen .cinematic-overlay,
body:-webkit-full-screen .cinematic-overlay,
.cinematic-overlay:fullscreen,
.cinematic-overlay:-webkit-full-screen {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100% !important;
    height: 100% !important;
    min-width: 100vw !important;
    min-height: 100vh !important;
    margin: 0 !important;
    padding: 0 !important;
    z-index: 2147483647 !important;
}

/* Background video — edge-to-edge cover like a video player */
.cinematic-video {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    object-fit: cover;
    z-index: 1;
    pointer-events: none;
}

.cinematic-video.is-hidden {
    opacity: 0;
}

/* Gradient fallback when video is missing or fails */
.cinematic-fallback {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    min-width: 100%;
    min-height: 100%;
    z-index: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(123, 47, 247, 0.4) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(0, 212, 255, 0.3) 0%, transparent 50%),
        linear-gradient(180deg, #0a0a1a 0%, #0a0a0f 40%, #12081f 100%);
    animation: fallbackShift 12s ease-in-out infinite alternate;
}

.cinematic-fallback.is-active {
    z-index: 1;
}

@keyframes fallbackShift {
    0% { filter: hue-rotate(0deg) brightness(1); }
    100% { filter: hue-rotate(15deg) brightness(1.1); }
}

/* Particle canvas */
.particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    min-width: 100%;
    min-height: 100%;
    z-index: 2;
    pointer-events: none;
}

/* Film grain */
.cinematic-grain {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
    pointer-events: none;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    animation: grainShift 0.5s steps(1) infinite;
}

@keyframes grainShift {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-2%, -2%); }
    50% { transform: translate(2%, 2%); }
    75% { transform: translate(-1%, 1%); }
}

/* Vignette */
.cinematic-vignette {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 4;
    pointer-events: none;
    background: radial-gradient(
        ellipse at center,
        transparent 30%,
        rgba(0, 0, 0, 0.5) 70%,
        rgba(0, 0, 0, 0.85) 100%
    );
}

/* Subtle blur layer at edges */
.cinematic-blur-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    pointer-events: none;
    backdrop-filter: blur(0px);
    mask-image: radial-gradient(ellipse at center, transparent 50%, black 100%);
    -webkit-mask-image: radial-gradient(ellipse at center, transparent 50%, black 100%);
}

/* Content */
.cinematic-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 2rem;
    max-width: 900px;
    width: 100%;
}

.cinematic-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 6vw, 4.5rem);
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #fff;
    text-shadow:
        0 0 20px var(--color-glow),
        0 0 40px var(--color-glow),
        0 0 80px var(--color-glow-purple);
    filter: drop-shadow(0 0 30px var(--color-glow));
    animation: glowPulse 3s ease-in-out infinite, fadeSlideUp 1s ease-out 0.3s both;
    margin-bottom: 1.25rem;
    line-height: 1.15;
}

.cinematic-subtitle {
    font-family: var(--font-body);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    font-weight: 300;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 3rem;
    animation: fadeSlideUp 1s ease-out 0.6s both;
}

@keyframes glowPulse {
    0%, 100% {
        text-shadow:
            0 0 20px var(--color-glow),
            0 0 40px var(--color-glow),
            0 0 80px var(--color-glow-purple);
        filter: drop-shadow(0 0 30px var(--color-glow));
    }
    50% {
        text-shadow:
            0 0 30px var(--color-glow),
            0 0 60px var(--color-glow),
            0 0 120px var(--color-glow-purple);
        filter: drop-shadow(0 0 50px var(--color-glow));
    }
}

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
    .site-header {
        padding: 1rem 1.25rem;
    }

    .site-nav {
        gap: 1.25rem;
    }

    .site-nav a {
        font-size: 0.8rem;
    }

    .hero {
        min-height: 75vh;
        padding: 3rem 1.5rem;
    }

    .section {
        padding: 3.5rem 1.5rem;
    }

    .cinematic-content {
        padding: 1.5rem;
    }

    .cinematic-subtitle {
        margin-bottom: 2.5rem;
        letter-spacing: 0.12em;
    }
}

@media (max-width: 480px) {
    .site-nav {
        display: none;
    }

    .hero-title {
        letter-spacing: 0.05em;
    }

    .cinematic-title {
        letter-spacing: 0.08em;
    }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .cinematic-overlay {
        transition-duration: 0.2s;
    }

    html {
        scroll-behavior: auto;
    }
}