/* ============================================
   SECURENCE VISUALIZATION — Global Design System
   Matches main website design language exactly
   ============================================ */

/* ──────────── Google Fonts (same as main site) ──────────── */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700&display=swap');

/* ──────────── CSS Variables ──────────── */
:root {
    /* Core palette from spec */
    --bg: #0b0f1a;
    --accent: #00f0ff;
    --safe: #00ff88;
    --alert: #ff3b3b;
    --text: #e6e6e6;
    --transition: 0.4s ease;

    /* Extended palette matching main website */
    --bg-primary: #050510;
    --bg-secondary: #0a0a1a;
    --bg-card: rgba(15, 15, 35, 0.6);
    --bg-glass: rgba(255, 255, 255, 0.03);

    /* Neon Accent Colors */
    --neon-purple: #a855f7;
    --neon-blue: #3b82f6;
    --neon-pink: #ec4899;
    --neon-cyan: #06b6d4;
    --neon-green: #10b981;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #a855f7, #3b82f6, #ec4899);
    --gradient-accent: linear-gradient(135deg, #7c3aed, #2563eb);
    --gradient-glow: linear-gradient(135deg, rgba(168,85,247,0.3), rgba(59,130,246,0.3), rgba(236,72,153,0.3));
    --gradient-card: linear-gradient(135deg, rgba(168,85,247,0.08), rgba(59,130,246,0.05));
    --gradient-danger: linear-gradient(135deg, #ef4444, #dc2626);
    --gradient-safe: linear-gradient(135deg, #10b981, #06b6d4);

    /* Text Colors */
    --text-primary: #f1f5f9;
    --text-secondary: rgba(241, 245, 249, 0.6);
    --text-muted: rgba(241, 245, 249, 0.35);

    /* Borders */
    --border-subtle: rgba(168, 85, 247, 0.12);
    --border-glow: rgba(168, 85, 247, 0.3);

    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --section-padding: 120px;
    --container-max: 1200px;

    /* Transitions */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ──────────── Reset & Base ──────────── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    overflow-x: hidden;
    max-width: 100%;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Scrollbar matching main site */
body::-webkit-scrollbar {
    width: 6px;
}
body::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
body::-webkit-scrollbar-thumb {
    background: rgba(168, 85, 247, 0.3);
    border-radius: 3px;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ──────────── Preloader ──────────── */
#viz-preloader {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#viz-preloader.loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.viz-loader-ring {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    position: relative;
}

.viz-loader-ring::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: var(--neon-purple);
    border-right-color: var(--neon-blue);
    animation: vizLoaderSpin 1s linear infinite;
}

.viz-loader-ring-inner {
    position: absolute;
    inset: 8px;
    border-radius: 50%;
    border: 2px solid transparent;
    border-bottom-color: var(--neon-pink);
    border-left-color: var(--neon-cyan);
    animation: vizLoaderSpin 0.6s linear infinite reverse;
}

@keyframes vizLoaderSpin {
    to { transform: rotate(360deg); }
}

.viz-loader-text {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.viz-loader-progress {
    width: 200px;
    height: 2px;
    background: rgba(255,255,255,0.05);
    border-radius: 2px;
    overflow: hidden;
}

.viz-loader-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* ──────────── Navigation ──────────── */
.viz-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 8px 0;
    transition: all 0.4s var(--ease-out-expo);
    max-width: 100%;
    background: rgba(5, 5, 16, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.viz-nav-container {
    max-width: var(--container-max);
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.viz-nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 2px;
}

.viz-logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    filter: drop-shadow(0 0 10px rgba(168,85,247,0.5));
}

.viz-logo-icon svg {
    width: 100%;
    height: 100%;
}

.viz-nav-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border: 1px solid var(--border-glow);
    background: transparent;
    color: var(--neon-purple);
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 1px;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.viz-nav-back:hover {
    background: rgba(168, 85, 247, 0.1);
    border-color: var(--neon-purple);
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.2);
}

.viz-nav-back svg {
    width: 14px;
    height: 14px;
}

/* ──────────── Utility Classes ──────────── */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--neon-purple);
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.7;
}

/* ──────────── Buttons (matching main site exactly) ──────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 100px;
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.4s var(--ease-out-expo);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 30px rgba(168, 85, 247, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(168, 85, 247, 0.5);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-glow);
}

.btn-outline:hover {
    background: rgba(168, 85, 247, 0.1);
    border-color: var(--neon-purple);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.05);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1rem;
}

/* ──────────── Animation Keyframes ──────────── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ──────────── Responsive Base ──────────── */
@media (max-width: 768px) {
    .viz-nav-container {
        padding: 0 16px;
    }

    .viz-nav-logo .logo-text-full {
        display: none;
    }

    .viz-nav {
        padding: 6px 0;
    }
}

/* Page title in nav — always visible */
.viz-page-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 2px;
    color: var(--text-primary);
}

@media (max-width: 480px) {
    .viz-page-title {
        font-size: 0.75rem;
        letter-spacing: 1px;
    }

    .viz-nav {
        padding: 5px 0;
    }

    .viz-nav-container {
        padding: 0 10px;
    }

    .viz-nav-back {
        padding: 4px 10px;
        font-size: 0.65rem;
        gap: 3px;
    }

    .viz-nav-back svg {
        width: 11px;
        height: 11px;
    }

    .viz-logo-icon {
        width: 1rem;
        height: 1rem;
    }

    .btn-lg {
        padding: 14px 28px;
        font-size: 0.9rem;
    }
}

@media (max-width: 360px) {
    .viz-page-title {
        font-size: 0.65rem;
        letter-spacing: 0.5px;
    }

    .viz-nav-back {
        padding: 3px 8px;
        font-size: 0.6rem;
    }

    .viz-logo-icon {
        width: 0.9rem;
        height: 0.9rem;
    }
}

/* ──────────── Visualization Footer (Minimal) ──────────── */
.viz-page-footer {
    padding: 16px 0;
    text-align: center;
    border-top: 1px solid var(--border-subtle);
    position: relative;
    flex-shrink: 0;
    z-index: 100;
    background: var(--bg-primary);
}

.viz-page-footer-glow {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 2px;
    background: var(--gradient-primary);
    filter: blur(2px);
    opacity: 0.4;
}

.viz-page-footer p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.viz-page-footer a {
    color: var(--neon-purple);
    transition: color 0.3s ease;
}

.viz-page-footer a:hover {
    color: var(--text-primary);
}