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

:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --accent: #06b6d4;
    --accent-purple: #a855f7;
    --transition-speed: 0.3s;
}

:root, [data-theme="dark"] {
    --background: #0a0f1e;
    --background-gradient-start: #0a0f1e;
    --background-gradient-mid: #151b2e;
    --surface: rgba(21, 27, 46, 0.95);
    --surface-light: rgba(30, 39, 56, 0.95);
    --surface-elevated: rgba(37, 45, 66, 0.95);
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(59, 130, 246, 0.1);
    --border-light: rgba(59, 130, 246, 0.15);
    --canvas-bg: #050810;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
    --background: #f8fafc;
    --background-gradient-start: #ffffff;
    --background-gradient-mid: #f1f5f9;
    --surface: rgba(255, 255, 255, 0.95);
    --surface-light: rgba(248, 250, 252, 0.95);
    --surface-elevated: rgba(241, 245, 249, 0.95);
    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border: rgba(226, 232, 240, 0.8);
    --border-light: rgba(203, 213, 225, 0.8);
    --canvas-bg: #f8fafc;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--background-gradient-start) 0%, var(--background-gradient-mid) 50%, var(--background-gradient-start) 100%);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(168, 85, 247, 0.05) 0%, transparent 50%);
    animation: gradient-shift 15s ease infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes gradient-shift {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(10%, 10%); }
}

/* Landing Page Styles */
#landingPage {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 15, 30, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 2rem;
    z-index: 1000;
    transition: all 0.3s ease;
}

.landing-nav.scrolled {
    background: rgba(10, 15, 30, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
}

.nav-logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
}

.nav-logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    cursor: pointer;
}

.nav-link:hover {
    color: var(--primary-light);
}

.nav-cta {
    padding: 0.75rem 1.75rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(59, 130, 246, 0.5);
}

/* Hero Section */
.hero-section {
    margin-top: 100px;
    padding: 4rem 2rem;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 50px;
    color: var(--primary-light);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.btn-primary {
    padding: 1.25rem 3rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border: none;
    border-radius: 14px;
    color: white;
    font-weight: 700;
    font-size: 1.125rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
    padding: 1.25rem 3rem;
    background: var(--surface-elevated);
    border: 2px solid var(--border-light);
    border-radius: 14px;
    color: var(--text);
    font-weight: 600;
    font-size: 1.125rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--primary);
    background: var(--surface-light);
    transform: translateY(-2px);
}

/* Features Grid */
.features-section {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 4rem;
    background: linear-gradient(135deg, var(--text), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--surface);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2.5rem;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.2);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Stats Section */
.stats-section {
    padding: 4rem 2rem;
    background: var(--surface);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stats-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1.125rem;
    font-weight: 500;
}

.success-toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--success);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(16, 185, 129, 0.4);
    font-weight: 500;
    animation: slideIn 0.3s ease;
    z-index: 10000;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-link {
        display: none;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 300px;
    }
}