/* ===================================
   ROUTEBRAIN AI - LIQUID GLASS DESIGN
   Implementing Aether Philosophy
   =================================== */

/* === ROOT VARIABLES === */
:root {
    /* Glass Effect Colors */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    
    /* Primary Colors */
    --primary-blue: #3b82f6;
    --primary-purple: #8b5cf6;
    --primary-pink: #ec4899;
    --primary-green: #10b981;
    
    /* Text Colors */
    --text-primary: rgba(255, 255, 255, 0.95);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.5);
    
    /* Background */
    --bg-dark: #0a0a0f;
    --bg-gradient-1: #1a1a2e;
    --bg-gradient-2: #16213e;
    
    /* Universal Border Radius - Liquid Glass Principle */
    --radius-large: 1.5rem;  /* rounded-2xl for containers */
    --radius-full: 9999px;   /* rounded-full for circles */
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Animation */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === ANIMATED BACKGROUND === */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-gradient-1) 0%, var(--bg-gradient-2) 100%);
}

.gradient-orb {
    position: absolute;
    border-radius: var(--radius-full);
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--primary-blue), transparent);
    top: -250px;
    left: -250px;
    animation-delay: 0s;
}

.orb-2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-purple), transparent);
    top: 50%;
    right: -300px;
    animation-delay: 7s;
}

.orb-3 {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, var(--primary-pink), transparent);
    bottom: -225px;
    left: 50%;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(50px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-50px, 50px) scale(0.9);
    }
}

/* === GLASS MORPHISM COMPONENTS === */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%) brightness(110%);
    -webkit-backdrop-filter: blur(20px) saturate(180%) brightness(110%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-large);
    box-shadow: 
        0 8px 32px var(--glass-shadow),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all 0.4s var(--transition-smooth);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 12px 48px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.15),
        0 0 20px rgba(59, 130, 246, 0.1);
}

/* === CONTAINER === */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* === NAVIGATION === */
.glass-nav {
    position: fixed;
    top: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    width: calc(100% - var(--spacing-2xl));
    max-width: 1200px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-large);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo svg {
    color: var(--primary-blue);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-large);
    transition: all 0.3s var(--transition-smooth);
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* === BUTTONS === */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-large);
    transition: all 0.4s var(--transition-smooth);
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    color: white;
    box-shadow: 
        0 4px 16px rgba(59, 130, 246, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 8px 24px rgba(59, 130, 246, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        0 0 30px rgba(59, 130, 246, 0.2);
}

.btn-secondary {
    background: var(--glass-bg);
    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, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.9rem;
}

.btn-large {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1.05rem;
}

/* === HERO SECTION === */
.hero {
    padding: calc(var(--spacing-2xl) + 80px) 0 var(--spacing-2xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.glass-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    width: fit-content;
    font-size: 0.9rem;
    color: var(--text-secondary);
    animation: fadeInUp 0.8s var(--transition-smooth);
}

.badge-icon {
    font-size: 1.2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    animation: fadeInUp 0.8s var(--transition-smooth) 0.1s backwards;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple), var(--primary-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 600px;
    animation: fadeInUp 0.8s var(--transition-smooth) 0.2s backwards;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s var(--transition-smooth) 0.3s backwards;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    animation: fadeInUp 0.8s var(--transition-smooth) 0.4s backwards;
}

.stat-item {
    padding: var(--spacing-md);
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-top: var(--spacing-xs);
}

/* === HERO VISUAL === */
.hero-visual {
    animation: fadeInRight 1s var(--transition-smooth) 0.3s backwards;
}

.hero-card {
    padding: var(--spacing-lg);
    position: relative;
}

.route-map {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
}

.map-svg {
    width: 100%;
    height: 100%;
}

.route-path {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: drawPath 3s ease-out forwards;
}

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

@keyframes drawPath {
    to {
        stroke-dashoffset: 0;
    }
}

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

.floating-info {
    position: absolute;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-large);
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.85rem;
    animation: floatUpDown 3s ease-in-out infinite;
}

.info-1 {
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.info-2 {
    top: 50%;
    right: 5%;
    animation-delay: 1s;
}

.info-3 {
    bottom: 10%;
    left: 5%;
    animation-delay: 2s;
}

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

.info-icon {
    font-size: 1.5rem;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.info-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* === SECTION STYLES === */
section {
    padding: var(--spacing-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* === PROBLEM SECTION === */
.problem-section {
    background: rgba(0, 0, 0, 0.2);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.problem-card {
    padding: var(--spacing-lg);
    text-align: center;
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.problem-card h3 {
    font-size: 1.35rem;
    margin-bottom: var(--spacing-sm);
}

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

/* === FEATURES SECTION === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    border-radius: var(--radius-large);
    color: white;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.feature-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    flex-grow: 1;
}

.feature-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    padding: 0.35rem 0.85rem;
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--primary-blue);
    font-weight: 500;
}

/* === BENEFITS SECTION === */
.benefits-section {
    background: rgba(0, 0, 0, 0.2);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.benefit-card {
    padding: var(--spacing-lg);
    text-align: center;
}

.benefit-metric {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.metric-value {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-change {
    font-size: 2rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
}

.metric-change.positive {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--primary-green);
}

.benefit-card h3 {
    font-size: 1.35rem;
    margin-bottom: var(--spacing-sm);
}

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

/* === HOW IT WORKS SECTION === */
.steps-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
}

.step-card {
    padding: var(--spacing-xl);
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.step-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    flex-shrink: 0;
}

.step-content {
    flex-grow: 1;
}

.step-content h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.step-visual {
    margin-top: var(--spacing-md);
}

.data-blocks {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.data-block {
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-large);
    font-size: 0.9rem;
    color: var(--text-primary);
}

.processing-animation {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-large);
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(139, 92, 246, 0.2);
    border-top-color: var(--primary-purple);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

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

.processing-text {
    color: var(--primary-purple);
    font-weight: 600;
}

.execution-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.exec-item {
    padding: var(--spacing-sm);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-large);
    color: var(--primary-green);
    font-weight: 500;
}

.step-connector {
    display: flex;
    justify-content: center;
    color: var(--text-tertiary);
}

/* === CTA SECTION === */
.cta-section {
    padding: var(--spacing-2xl) 0;
}

.cta-card {
    padding: var(--spacing-2xl);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.cta-feature {
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

/* === FOOTER === */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(0, 0, 0, 0.2);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

.footer-column h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
    transition: color 0.3s var(--transition-smooth);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.footer-domain {
    font-weight: 600;
    color: var(--primary-blue);
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2.25rem;
    }
    
    .features-grid,
    .problem-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .step-card {
        flex-direction: column;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.85rem;
    }
    
    .glass-nav {
        width: calc(100% - var(--spacing-lg));
    }
}