:root {
    /* Dynamic Theme Tokens - Overridden by engine.js */
    --primary: var(--primary-color, #6366f1);
    --primary-rgb: 99, 102, 241;
    --secondary: var(--secondary-color, #a855f7);
    --accent: var(--accent-color, #ec4899);
    --bg-main: var(--bg-main, #020617);
    --text-primary: var(--text-main, #f8fafc);
    --text-secondary: rgba(255, 255, 255, 0.6);
    --primary-glow: rgba(99, 102, 241, 0.15);

    /* Layout Tokens */
    --radius-premium: var(--border-radius, 32px);
    --spacing-unit: var(--section-spacing, 5rem);
    --container-width: 1200px;
    --transition-smooth: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);

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

    /* Glass Effects */
    --glass-bg: rgba(15, 23, 42, 0.4);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(24px);
    --glass-shadow: 0 50px 100px -20px rgba(0, 0, 0, 0.6);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

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

h1,
h2,
h3,
h4,
.logo {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin-bottom: 1rem;
}

/* --- Premium Background Effects --- */
.bg-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.05), var(--bg-main));
}

.bg-mesh::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3C%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
}

/* --- Layout Components --- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

header {
    height: 100px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.75rem;
    font-weight: 800;
    text-decoration: none;
    color: white;
    letter-spacing: -1px;
}

.logo span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav ul {
    display: flex;
    gap: 3rem;
    list-style: none;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

nav a:hover {
    color: var(--primary);
}

/* --- Hero Section --- */
.hero {
    padding: calc(var(--spacing-unit) * 2) 0 var(--spacing-unit);
    text-align: center;
    position: relative;
}

/* Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.stagger-1 {
    transition-delay: 0.1s;
}

.stagger-2 {
    transition-delay: 0.2s;
}

.stagger-3 {
    transition-delay: 0.3s;
}

.stagger-4 {
    transition-delay: 0.4s;
}

/* Mobile Menu Refinement */
.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.95);
    backdrop-filter: blur(20px);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
}

.mobile-nav-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav-link {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    text-decoration: none;
    transition: var(--transition-fast);
}

.mobile-nav-link:hover {
    color: var(--primary);
    transform: scale(1.1);
}

/* Haptic Feedback (Visual only) */
.haptic-tap {
    animation: haptic-pulse 0.2s ease-out;
}

@keyframes haptic-pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(0.92);
    }

    100% {
        transform: scale(1);
    }
}

/* Responsive Overrides */
@media (max-width: 1024px) {
    .desktop-nav {
        display: none !important;
    }

    #mobile-menu-toggle {
        display: block !important;
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 2rem;
    font-weight: 600;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1;
    margin-bottom: 2rem;
    letter-spacing: -2px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 3rem;
}

/* --- Glass Cards 2.0 --- */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-premium);
    padding: 3rem;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top left, rgba(255, 255, 255, 0.05), transparent);
    pointer-events: none;
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-12px) scale(1.02);
    background: rgba(30, 41, 59, 0.6);
    box-shadow: var(--glass-shadow);
}

.glass-premium {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37),
        inset 0 0 80px rgba(255, 255, 255, 0.02);
    transition: var(--transition-smooth);
}

.glass-premium:hover {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.05));
    transform: translateY(-8px);
}

/* --- Interactive Elements --- */
.btn-premium {
    padding: 1.25rem 3rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 100px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 10px 30px -10px var(--primary-glow);
}

.btn-premium:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 20px 40px -10px var(--primary-glow);
}

/* --- AdSense Compliant Content Styles --- */
.article-section {
    padding: 6rem 0;
}

article {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

article h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, white, var(--text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

article p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.article-header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.article-body {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* --- Tool Layout --- */
.tool-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 4rem;
}

.input-area textarea {
    width: 100%;
    height: 300px;
    background: #020617;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 1.5rem;
    color: white;
    font-size: 1.1rem;
    resize: none;
}

/* --- Footer --- */
footer {
    background: #020617;
    padding: 8rem 0 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
}

.footer-logo {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    display: block;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: white;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 8px;
}

/* --- Dynamic Animation Styles --- */
[data-animation="fade"] body {
    opacity: 0;
    transition: opacity 0.8s ease;
}

[data-animation="fade"] body.animate-in {
    opacity: 1;
}

[data-animation="slide"] body {
    transform: translateY(30px);
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

[data-animation="slide"] body.animate-in {
    transform: translateY(0);
    opacity: 1;
}

[data-animation="scale"] body {
    transform: scale(0.98);
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

[data-animation="scale"] body.animate-in {
    transform: scale(1);
    opacity: 1;
}

/* Section Animations */
.glass-card {
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition-smooth);
}

body.animate-in .glass-card {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered load for cards (if using grid) */
.glass-card:nth-child(1) {
    transition-delay: 0.1s;
}

.glass-card:nth-child(2) {
    transition-delay: 0.2s;
}

.glass-card:nth-child(3) {
    transition-delay: 0.3s;
}

/* Premium Shimmer Effect */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

.btn-premium {
    position: relative;
    overflow: hidden;
}

.btn-premium::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    animation: shimmer 3s infinite;
}

/* Float Animation */
@keyframes float {

    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }

    33% {
        transform: translateY(-15px) rotate(1deg);
    }

    66% {
        transform: translateY(-5px) rotate(-1deg);
    }
}

@keyframes liquid-glass {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.liquid-glass {
    background: linear-gradient(-45deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01), rgba(255, 255, 255, 0.05));
    background-size: 400% 400%;
    animation: liquid-glass 15s ease infinite;
}

.float-ui {
    animation: float 5s ease-in-out infinite;
}

@media (max-width: 1024px) {
    .tool-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    header {
        height: 80px;
    }

    nav {
        display: none;
    }

    .hero {
        padding: 6rem 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
}