/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Liquid Glass Colors */
    --glass-white: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
    --gradient-accent: linear-gradient(135deg, #22d3ee 0%, #a78bfa 100%);
    
    /* Colors */
    --color-primary: #60a5fa;
    --color-secondary: #a78bfa;
    --color-accent: #22d3ee;
    --color-danger: #f87171;
    --color-warning: #fbbf24;
    --color-success: #34d399;
    
    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius - ONLY TWO VALUES */
    --radius-2xl: 1.5rem; /* Main radius for all containers */
    --radius-full: 9999px; /* For circular/pill elements */
    
    /* Transitions */
    --transition-smooth: cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ===== LIQUID GLASS COMPONENTS ===== */
.glass-card {
    background: var(--glass-white);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: 
        0 8px 32px 0 var(--glass-shadow),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.1);
    transition: all 0.4s var(--transition-smooth);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 16px 48px 0 rgba(0, 0, 0, 0.2),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.2),
        0 0 40px 0 rgba(96, 165, 250, 0.15);
}

.glass-nav {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s var(--transition-smooth);
}

.glass-nav.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: 0 4px 24px 0 rgba(0, 0, 0, 0.2);
}

.glass-input {
    background: var(--glass-white);
    backdrop-filter: blur(10px) saturate(150%);
    -webkit-backdrop-filter: blur(10px) saturate(150%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    font-size: 1rem;
    transition: all 0.3s var(--transition-smooth);
}

.glass-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 
        0 0 0 3px rgba(96, 165, 250, 0.15),
        inset 0 0 20px 0 rgba(96, 165, 250, 0.1);
}

.glass-input::placeholder {
    color: var(--text-muted);
}

/* ===== BUTTONS ===== */
.btn-primary, .btn-secondary {
    padding: 0.875rem 2rem;
    border-radius: var(--radius-2xl);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s var(--transition-smooth);
    cursor: pointer;
    border: none;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(96, 165, 250, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(96, 165, 250, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--glass-white);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--color-primary);
    box-shadow: 0 0 30px rgba(96, 165, 250, 0.2);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

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

section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

/* ===== NAVIGATION ===== */
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
}

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

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s var(--transition-smooth);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 1.5rem;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all 0.3s var(--transition-smooth);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.4;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 800px;
}

.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 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
    max-width: 600px;
}

.stat-item {
    padding: 1.5rem;
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== FEATURES SECTION ===== */
.features {
    background: radial-gradient(circle at 50% 0%, rgba(96, 165, 250, 0.05) 0%, transparent 50%);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 4rem;
}

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

.feature-card {
    padding: 2rem;
    transition: all 0.4s var(--transition-smooth);
}

.feature-icon {
    margin-bottom: 1.5rem;
    display: inline-block;
    padding: 1rem;
    background: var(--glass-white);
    border-radius: var(--radius-2xl);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.feature-list {
    list-style: none;
}

.feature-list li {
    color: var(--text-muted);
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
    background: radial-gradient(circle at 50% 50%, rgba(167, 139, 250, 0.05) 0%, transparent 50%);
}

.workflow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.workflow-step {
    flex: 1;
    min-width: 200px;
    max-width: 240px;
    padding: 2rem 1.5rem;
    text-align: center;
}

.step-number {
    display: inline-block;
    width: 3.5rem;
    height: 3.5rem;
    line-height: 3.5rem;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.step-description {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.workflow-arrow {
    flex-shrink: 0;
}

.graph-demo {
    padding: 2rem;
    margin-top: 3rem;
}

.graph-demo-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

#graph-canvas {
    width: 100%;
    height: 400px;
    border-radius: var(--radius-2xl);
    background: rgba(0, 0, 0, 0.2);
    margin-bottom: 1.5rem;
}

.graph-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.graph-legend {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.legend-dot {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: var(--radius-full);
}

/* ===== USE CASES ===== */
.use-cases {
    background: radial-gradient(circle at 50% 100%, rgba(34, 211, 238, 0.05) 0%, transparent 50%);
}

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

.use-case-card {
    padding: 2.5rem;
}

.use-case-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.use-case-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.use-case-description {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.use-case-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric-value {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.metric-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ===== CTA SECTION ===== */
.cta {
    background: radial-gradient(circle at 50% 50%, rgba(96, 165, 250, 0.1) 0%, transparent 70%);
}

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

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.cta-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

.form-input {
    width: 100%;
}

select.glass-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='rgba(255,255,255,0.6)' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1.5rem center;
    padding-right: 3rem;
}

/* ===== FOOTER ===== */
.footer {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: 4rem 0 2rem;
}

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

.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-secondary);
    line-height: 1.6;
}

.footer-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

.footer-links li {
    margin-bottom: 0.625rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 968px) {
    .workflow {
        flex-direction: column;
    }
    
    .workflow-arrow {
        transform: rotate(90deg);
    }
    
    .workflow-step {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--glass-border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.4s var(--transition-smooth);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-links li {
        width: 100%;
        text-align: center;
    }
    
    .nav-links .btn-primary {
        width: 100%;
        text-align: center;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-large {
        width: 100%;
        text-align: center;
    }
    
    .cta-content {
        padding: 2rem;
    }
    
    .cta-title {
        font-size: 1.875rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    section {
        padding: var(--spacing-lg) 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(96, 165, 250, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(96, 165, 250, 0.6);
    }
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-glow {
    animation: glow 2s ease-in-out infinite;
}