:root {
    --intro-accent: #6366f1;
    --intro-accent-glow: rgba(99, 102, 241, 0.4);
    --intro-glass-bg: rgba(15, 23, 42, 0.5);
    --intro-glass-border: rgba(255, 255, 255, 0.15);
    --intro-text-glow: 0 0 20px rgba(99, 102, 241, 0.5);
}

/* Noise overlay for cinematic texture */
.intro-noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    background: url('https://grainy-gradients.vercel.app/noise.svg');
    opacity: 0.05;
    pointer-events: none;
}

.intro-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: #020617;
    z-index: 999999;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: opacity 1.2s cubic-bezier(0.7, 0, 0.3, 1), visibility 1.2s;
    font-family: 'Outfit', sans-serif;
}

.intro-overlay.fade-out {
    opacity: 0;
    visibility: hidden;
}

/* Cinematic Background - Animated Grid & Map Hints */
.intro-bg-container {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, #0f172a 0%, #020617 100%);
    z-index: 1;
}

/* Circuit lines for added technical detail */
.intro-circuits {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(var(--intro-accent) 0.5px, transparent 0.5px);
    background-size: 30px 30px;
    mask-image: linear-gradient(to bottom, transparent, black, transparent);
    opacity: 0.1;
    z-index: 2;
}

.intro-grid {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background-image: 
        linear-gradient(rgba(99, 102, 241, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.1) 1px, transparent 1px);
    background-size: 60px 60px;
    transform: perspective(1000px) rotateX(65deg) translateY(0);
    animation: gridAnimation 15s linear infinite;
    z-index: 2;
    opacity: 0.15;
    will-change: transform;
}

/* Atmospheric Scanner Line */
.intro-scanner {
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 20vh;
    background: linear-gradient(to bottom, transparent, var(--intro-accent-glow), transparent);
    z-index: 4;
    opacity: 0.8;
    animation: scanLine 4s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes scanLine {
    0% { top: -20%; opacity: 0; }
    30% { opacity: 0.8; }
    70% { opacity: 0.8; }
    100% { top: 120%; opacity: 0; }
}

@keyframes gridAnimation {
    from { transform: perspective(1000px) rotateX(65deg) translateY(0); }
    to { transform: perspective(1000px) rotateX(65deg) translateY(60px); }
}

.intro-nodes {
    position: absolute;
    inset: 0;
    z-index: 3;
}

.intro-node {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #6366f1;
    border-radius: 50%;
    box-shadow: 0 0 10px #6366f1;
    opacity: 0;
    will-change: transform, opacity;
    animation: nodePulse 4s infinite ease-in-out;
}

@keyframes nodePulse {
    0% { transform: scale(0); opacity: 0; }
    20% { transform: scale(1.5); opacity: 0.7; }
    50% { transform: scale(0.8); opacity: 0.3; }
    100% { transform: scale(0); opacity: 0; }
}

/* Glassmorphism Panel with Holographic Edges */
.intro-panel {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 70px 120px;
    background: var(--intro-glass-bg);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border: 1px solid var(--intro-glass-border);
    border-radius: 40px;
    box-shadow: 
        0 20px 80px rgba(0, 0, 0, 0.6),
        inset 0 0 1px 1px rgba(255,255,255,0.05);
    opacity: 0;
    will-change: transform, opacity;
    transform: scale(0.95) translateY(20px);
    animation: panelReveal 1s cubic-bezier(0.16, 1, 0.3, 1) forwards 0.5s;
}

.intro-panel::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 51px;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255,255,255,0.4), transparent 50%, rgba(99, 102, 241, 0.4));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

@keyframes panelReveal {
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.intro-title-wrap {
    position: relative;
    overflow: hidden;
    margin-bottom: 12px;
}

.intro-title {
    font-size: 5rem;
    font-weight: 900;
    color: white;
    letter-spacing: -4px;
    margin: 0;
    background: linear-gradient(135deg, #ffffff 10%, #818cf8 90%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: titleBreath 10s ease-in-out infinite, titleGlow 4s ease-in-out infinite;
    text-shadow: var(--intro-text-glow);
}

@keyframes titleGlow {
    0%, 100% { filter: drop-shadow(0 0 5px rgba(99,102,241,0.2)); }
    50% { filter: drop-shadow(0 0 15px rgba(99,102,241,0.5)); }
}

@keyframes titleBreath {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.03); }
}

.intro-light-sweep {
    position: absolute;
    top: 0;
    left: -100%;
    width: 200%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
    transform: skewX(-25deg);
    animation: lightSweepEffect 5s infinite forwards 1.2s;
}

@keyframes lightSweepEffect {
    0% { left: -100%; }
    30%, 100% { left: 100%; }
}

.intro-tagline {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 6px;
    text-transform: uppercase;
    font-weight: 600;
    margin: 0;
    opacity: 0;
    transform: translateY(10px);
    animation: taglineReveal 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards 1.4s;
}

@keyframes taglineReveal {
    to { opacity: 1; transform: translateY(0); }
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .intro-panel {
        padding: 40px 24px;
        width: 90%;
        border-radius: 24px;
        backdrop-filter: blur(8px) saturate(140%);
        -webkit-backdrop-filter: blur(8px) saturate(140%);
    }
    .intro-title {
        font-size: 2.2rem;
        letter-spacing: -1px;
    }
    .intro-tagline {
        font-size: 0.75rem;
        letter-spacing: 3px;
    }
}