/* ===================================
   AuditCraft AI - Liquid Glass Design
   =================================== */

/* CSS Variables - Design System */
:root {
    /* Colors */
    --primary-blue: #3b82f6;
    --primary-dark: #1e3a8a;
    --accent-cyan: #06b6d4;
    --success-green: #10b981;
    --text-white: #ffffff;
    --text-gray: #cbd5e1;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    
    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-bg-hover: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glass-blur: 16px;
    
    /* Border Radius */
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-duration: 300ms;
}

/* ===================================
   Reset & Base Styles
   =================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===================================
   Glass Utilities
   =================================== */

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%) brightness(110%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%) brightness(110%);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow),
                inset 0 0 0 1px rgba(255, 255, 255, 0.05);
    transition: all var(--transition-duration) var(--transition-smooth);
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 12px 48px rgba(59, 130, 246, 0.3),
                inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

/* ===================================
   Navigation
   =================================== */

.nav-glass {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 2rem;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-duration) var(--transition-smooth);
    padding: 0.5rem 0;
}

.nav-links a:hover {
    color: var(--text-white);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-white);
    border-radius: var(--radius-full);
    transition: all var(--transition-duration) var(--transition-smooth);
}

/* ===================================
   Buttons
   =================================== */

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-2xl);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-duration) var(--transition-smooth);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-cyan) 100%);
    color: var(--text-white);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    color: var(--text-white);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--glass-bg-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 0 4rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.15) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.badge-glass {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 2rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.badge-icon {
    font-size: 1.25rem;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.gradient-text {
    display: block;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--text-gray);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.stat-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition-duration) var(--transition-smooth);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(59, 130, 246, 0.2);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-top: 0.25rem;
}

/* ===================================
   Container & Section
   =================================== */

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ===================================
   Features Section
   =================================== */

.features {
    position: relative;
}

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

.feature-card {
    padding: 2.5rem;
}

.feature-icon-wrapper {
    width: 80px;
    height: 80px;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(6, 182, 212, 0.2) 100%);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--glass-border);
}

.feature-icon {
    font-size: 2.5rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.feature-description {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-gray);
}

.check-icon {
    width: 20px;
    height: 20px;
    color: var(--success-green);
    flex-shrink: 0;
}

/* ===================================
   Benefits Section
   =================================== */

.benefits {
    background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.benefit-card {
    padding: 2rem;
    text-align: center;
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.benefit-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* ===================================
   Frameworks Section
   =================================== */

.frameworks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.framework-card {
    padding: 2rem;
    text-align: center;
}

.framework-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.framework-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.framework-card p {
    font-size: 0.875rem;
    color: var(--text-gray);
}

/* ===================================
   CTA Section
   =================================== */

.cta {
    padding: 4rem 0;
}

.cta-content {
    text-align: center;
    padding: 4rem 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
}

.cta-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 2.5rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Footer
   =================================== */

.footer {
    border-top: 1px solid var(--glass-border);
    padding: 3rem 0 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-description {
    color: var(--text-gray);
    line-height: 1.6;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col ul li a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color var(--transition-duration) var(--transition-smooth);
}

.footer-col ul li a:hover {
    color: var(--text-white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-gray);
    font-size: 0.875rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-domain {
    font-weight: 600;
    color: var(--accent-cyan);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 6rem 0 3rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-cta a {
        width: 100%;
        justify-content: center;
    }
    
    .features-grid,
    .benefits-grid,
    .frameworks-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    section {
        padding: 3rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .feature-card,
    .benefit-card {
        padding: 1.5rem;
    }
}

/* ===================================
   Animations & Effects
   =================================== */

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

.feature-icon-wrapper {
    animation: float 3s ease-in-out infinite;
}

.feature-card:nth-child(2) .feature-icon-wrapper {
    animation-delay: 0.5s;
}

.feature-card:nth-child(3) .feature-icon-wrapper {
    animation-delay: 1s;
}

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

.glass-card {
    animation: fadeInUp 0.6s var(--transition-smooth) both;
}

.glass-card:nth-child(1) { animation-delay: 0.1s; }
.glass-card:nth-child(2) { animation-delay: 0.2s; }
.glass-card:nth-child(3) { animation-delay: 0.3s; }
.glass-card:nth-child(4) { animation-delay: 0.4s; }
.glass-card:nth-child(5) { animation-delay: 0.5s; }
.glass-card:nth-child(6) { animation-delay: 0.6s; }

/* Selection */
::selection {
    background: var(--primary-blue);
    color: var(--text-white);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--glass-bg);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-dark);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--glass-bg-hover);
}