/* =============================================
   Nomad Hub — Modern Design System
   ============================================= */

/* CSS Custom Properties */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-glass: rgba(255, 255, 255, 0.05);
    
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);
    
    --accent-primary: #6366f1;
    --accent-secondary: #a855f7;
    --accent-gradient: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;
    
    /* Typography */
    --font-sans: 'Inter', 'Noto Sans JP', -apple-system, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;
    
    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
    
    --blur-sm: 8px;
    --blur-md: 16px;
    --blur-lg: 32px;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Ambient Background */
.ambient-bg {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-primary);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-secondary);
    bottom: 20%;
    left: -100px;
    animation-delay: -7s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: #ec4899;
    bottom: -100px;
    right: 20%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -30px) scale(1.1); }
    50% { transform: translate(-30px, 50px) scale(0.9); }
    75% { transform: translate(30px, 30px) scale(1.05); }
}

/* Glass Card Effect */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.glass-card:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.08);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(var(--blur-md));
    border-bottom: 1px solid var(--border-color);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.logo-icon {
    font-size: 1.5em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(99, 102, 241, 0.5);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-ghost:hover {
    background: var(--bg-glass);
    border-color: var(--border-hover);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-3xl);
    padding: calc(80px + var(--space-3xl)) var(--space-lg) var(--space-3xl);
    max-width: 1400px;
    margin: 0 auto;
}

.hero-eyebrow {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-size: clamp(var(--font-size-4xl), 6vw, var(--font-size-6xl));
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-lg);
}

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

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 500px;
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.hero-cta {
    display: flex;
    gap: var(--space-md);
}

.hero-visual {
    position: relative;
    height: 500px;
}

.floating-card {
    position: absolute;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-slow);
}

.floating-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-1 {
    width: 350px;
    height: 250px;
    top: 10%;
    right: 0;
    transform: rotate(3deg);
}

.card-2 {
    width: 300px;
    height: 400px;
    bottom: 0;
    left: 10%;
    transform: rotate(-3deg);
}

.floating-card:hover {
    transform: rotate(0deg) scale(1.02);
}

/* Section Styles */
section {
    padding: var(--space-3xl) 0;
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-2xl);
}

.section-number {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--accent-primary);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, auto);
    gap: var(--space-md);
}

.bento-card {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
}

.bento-large {
    grid-column: span 2;
    grid-row: span 2;
    display: grid;
    grid-template-rows: 1fr auto;
}

.bento-medium {
    grid-column: span 2;
}

.bento-small {
    grid-column: span 1;
}

.card-tag {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
    margin-bottom: var(--space-sm);
}

.bento-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.bento-large h3 {
    font-size: var(--font-size-3xl);
}

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

.bento-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    flex-grow: 1;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--accent-primary);
    margin-top: var(--space-md);
    transition: gap var(--transition-fast);
}

.card-link:hover {
    gap: var(--space-sm);
}

.card-chart {
    margin-top: var(--space-lg);
}

.growth-chart {
    width: 100%;
    height: 80px;
}

/* Feature Section */
.feature-hero {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    position: relative;
}

.feature-image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    height: 400px;
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(10, 10, 15, 0.8), transparent);
}

.feature-content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.feature-content h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.feature-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.feature-list {
    margin-bottom: var(--space-xl);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) 0;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '✓';
    color: var(--accent-primary);
    font-weight: 700;
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.feature-card {
    padding: var(--space-xl);
    text-align: center;
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.feature-card h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Posts Section */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2xl);
}

.view-all {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--accent-primary);
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.post-card {
    overflow: hidden;
    transition: transform var(--transition-base);
}

.post-card:hover {
    transform: translateY(-4px);
}

.post-image {
    height: 200px;
    overflow: hidden;
}

.post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.post-card:hover .post-image img {
    transform: scale(1.05);
}

.post-content {
    padding: var(--space-lg);
}

.post-content time {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.post-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin: var(--space-sm) 0;
    line-height: 1.4;
}

.post-content p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Newsletter Section */
.newsletter-section {
    padding: var(--space-2xl) 0;
}

.newsletter-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2xl);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.1));
}

.newsletter-content h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.newsletter-content p {
    color: var(--text-secondary);
}

.newsletter-form {
    display: flex;
    gap: var(--space-sm);
}

.newsletter-form input {
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    min-width: 280px;
}

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

.newsletter-form input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* Footer */
.footer {
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-top: var(--space-md);
}

.footer-links h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    gap: var(--space-lg);
}

.footer-legal a {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        min-height: auto;
        padding-top: calc(80px + var(--space-2xl));
    }
    
    .hero-visual {
        display: none;
    }
    
    .bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .bento-large {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .feature-hero {
        grid-template-columns: 1fr;
    }
    
    .feature-image {
        height: 300px;
    }
    
    .feature-cards {
        grid-template-columns: 1fr;
    }
    
    .posts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .newsletter-card {
        flex-direction: column;
        text-align: center;
        gap: var(--space-lg);
    }
    
    .newsletter-form {
        flex-direction: column;
        width: 100%;
    }
    
    .newsletter-form input {
        min-width: auto;
        width: 100%;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 2rem;
        --space-2xl: 3rem;
        --space-3xl: 4rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .bento-grid {
        grid-template-columns: 1fr;
    }
    
    .bento-large,
    .bento-medium,
    .bento-small {
        grid-column: span 1;
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

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

.hero-content > * {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.hero-eyebrow { animation-delay: 0.1s; }
.hero-title { animation-delay: 0.2s; }
.hero-description { animation-delay: 0.3s; }
.hero-stats { animation-delay: 0.4s; }
.hero-cta { animation-delay: 0.5s; }

/* Scroll Animations */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}