/* ============================================
   CSS Variables & Root Styles
   ============================================ */

:root {
    --color-bg-deep: #0D1117;
    --color-bg-card: #161B22;
    --color-text-primary: #E0E0E0;
    --color-text-secondary: #B0B0B0;
    --color-accent-cyan: #00D9FF;
    --color-accent-lime: #39FF14;
    --color-accent-magenta: #FF006E;
    --color-accent-teal: #00B4B4;
    --color-border: #2D3139;
    --grid-opacity: 0.08;
    --path-opacity: 0.4;
    
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;
}

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

* {
    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(--color-bg-deep);
    color: var(--color-text-secondary);
    font-size: clamp(0.9rem, 2vw, 1.05rem);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 39px,
            var(--color-border) 39px,
            var(--color-border) 40px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 39px,
            var(--color-border) 39px,
            var(--color-border) 40px
        );
    background-size: 40px 40px;
    background-attachment: fixed;
    background-color: var(--color-bg-deep);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(0, 217, 255, 0.02) 0%,
        rgba(57, 255, 20, 0.02) 100%
    );
    background-size: 400% 400%;
    animation: gradient-shift 30s ease infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(1.8rem, 5vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.6rem, 4vw, 2.8rem);
    font-weight: 700;
}

h3 {
    font-size: clamp(1.3rem, 3vw, 2.2rem);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

h4 {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-accent-cyan);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-lime);
}

code {
    font-family: 'IBM Plex Mono', monospace;
    background: rgba(0, 217, 255, 0.08);
    color: var(--color-accent-cyan);
    padding: 2px 6px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9em;
}

.monospace {
    font-family: 'IBM Plex Mono', monospace;
    letter-spacing: 0.05em;
    color: var(--color-accent-cyan);
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
    position: sticky;
    top: 0;
    height: 12vh;
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(45, 49, 57, 0.3);
    z-index: 100;
    display: flex;
    align-items: center;
}

.header-content {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-xl);
}

.logo {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.nav-primary {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    flex: 1;
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: clamp(0.85rem, 1.8vw, 0.95rem);
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-accent-cyan);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-cyan);
    transition: width var(--transition-normal);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-indicator {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-cyan), var(--color-accent-lime));
    transition: all var(--transition-normal);
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: var(--spacing-md);
    }

    .nav-primary {
        width: 100%;
        gap: var(--spacing-sm);
        font-size: 0.8rem;
    }
}

/* ============================================
   Main Content & Sections
   ============================================ */

.main-content {
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-xl) 0;
    position: relative;
}

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

.hero-section {
    min-height: 80vh;
    justify-content: center;
    background: radial-gradient(ellipse at center, rgba(0, 217, 255, 0.05) 0%, transparent 70%);
}

.hero-text {
    max-width: 600px;
}

.hero-title {
    color: var(--color-accent-cyan);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    color: var(--color-text-secondary);
    font-size: clamp(1rem, 2.2vw, 1.2rem);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.hero-graphic {
    width: 100%;
    max-width: 300px;
    height: auto;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(20px); }
}

.section-title {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding-bottom: var(--spacing-md);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-cyan), var(--color-accent-lime));
    border-radius: 2px;
}

.final-section {
    min-height: auto;
}

/* ============================================
   Bento Grid & Cards
   ============================================ */

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.card {
    background: var(--color-bg-card);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    animation: card-fade-in 0.5s ease-out forwards;
    opacity: 0;
}

@keyframes card-fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.card:hover {
    background: rgba(22, 27, 34, 0.9);
    border-color: var(--color-accent-cyan);
    box-shadow: 0 8px 24px rgba(0, 217, 255, 0.1);
    transform: translateY(-4px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.card-title {
    color: var(--color-text-primary);
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    flex: 1;
}

.card-status {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-active {
    background: rgba(57, 255, 20, 0.15);
    color: var(--color-accent-lime);
}

.status-warning {
    background: rgba(255, 0, 110, 0.15);
    color: var(--color-accent-magenta);
}

.status-success {
    background: rgba(0, 180, 180, 0.15);
    color: var(--color-accent-teal);
}

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

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

.stat-value {
    font-family: 'IBM Plex Mono', monospace;
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 700;
    color: var(--color-accent-cyan);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}

.data-spark {
    display: flex;
    align-items: center;
    color: var(--color-accent-lime);
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(45, 49, 57, 0.5);
    border-radius: 3px;
    overflow: hidden;
    margin-top: var(--spacing-sm);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent-cyan), var(--color-accent-lime));
    border-radius: 3px;
    animation: progress-grow 1s ease-out forwards;
}

@keyframes progress-grow {
    from { width: 0 !important; }
}

/* ============================================
   Hub Cards
   ============================================ */

.hub-card {
    grid-column: span 1;
}

.hub-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent-lime);
    box-shadow: 0 0 8px var(--color-accent-lime), 0 0 16px rgba(57, 255, 20, 0.3);
}

.hub-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(45, 49, 57, 0.3);
}

.hub-detail:last-child {
    border-bottom: none;
}

.detail-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.detail-value {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 600;
    color: var(--color-accent-cyan);
}

/* ============================================
   Route Cards
   ============================================ */

.route-card {
    position: relative;
}

.route-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.route-badge.sea {
    background: rgba(0, 217, 255, 0.15);
    color: var(--color-accent-cyan);
}

.route-badge.air {
    background: rgba(57, 255, 20, 0.15);
    color: var(--color-accent-lime);
}

.route-badge.truck {
    background: rgba(0, 180, 180, 0.15);
    color: var(--color-accent-teal);
}

.route-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(45, 49, 57, 0.3);
}

.route-detail:last-of-type {
    border-bottom: none;
}

.route-progress {
    width: 100%;
    height: 6px;
    background: rgba(45, 49, 57, 0.5);
    border-radius: 3px;
    overflow: hidden;
    margin: var(--spacing-sm) 0;
}

.progress-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   Alerts Container
   ============================================ */

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

.alert {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-left: 4px solid;
    border-radius: var(--border-radius-md);
    background: rgba(22, 27, 34, 0.6);
    animation: alert-slide-in 0.5s ease-out;
}

@keyframes alert-slide-in {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.alert-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.alert-success {
    border-left-color: var(--color-accent-lime);
}

.alert-success .alert-icon {
    background: rgba(57, 255, 20, 0.2);
    color: var(--color-accent-lime);
}

.alert-warning {
    border-left-color: var(--color-accent-magenta);
}

.alert-warning .alert-icon {
    background: rgba(255, 0, 110, 0.2);
    color: var(--color-accent-magenta);
}

.alert-info {
    border-left-color: var(--color-accent-cyan);
}

.alert-info .alert-icon {
    background: rgba(0, 217, 255, 0.2);
    color: var(--color-accent-cyan);
}

.alert-error {
    border-left-color: var(--color-accent-magenta);
}

.alert-error .alert-icon {
    background: rgba(255, 0, 110, 0.2);
    color: var(--color-accent-magenta);
}

.alert-content {
    flex: 1;
}

.alert-title {
    color: var(--color-text-primary);
    font-size: 1rem;
    margin-bottom: 4px;
}

.alert-message {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.alert-time {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   Integration Section
   ============================================ */

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

.integration-card {
    background: var(--color-bg-card);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.integration-card:hover {
    border-color: var(--color-accent-cyan);
    box-shadow: 0 8px 24px rgba(0, 217, 255, 0.1);
}

.integration-card h4 {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.integration-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.code-block {
    display: block;
    background: rgba(13, 17, 23, 0.8);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    color: var(--color-accent-cyan);
    overflow-x: auto;
    word-break: break-all;
    margin: 0;
}

.closing-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
    border-top: 1px solid rgba(0, 217, 255, 0.2);
}

.closing-message p {
    font-size: clamp(1rem, 2.2vw, 1.2rem);
    color: var(--color-accent-cyan);
    margin: 0;
}

/* ============================================
   Connection Paths
   ============================================ */

.connection-paths {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.path-line {
    stroke: var(--color-accent-cyan);
    stroke-width: 1;
    fill: none;
    opacity: var(--path-opacity);
    filter: drop-shadow(0 0 4px rgba(0, 217, 255, 0.2));
    animation: path-draw 0.8s ease-out forwards;
}

@keyframes path-draw {
    from {
        stroke-dashoffset: 1000;
    }
    to {
        stroke-dashoffset: 0;
    }
}

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

@media (max-width: 1024px) {
    .section-content {
        grid-template-columns: 1fr;
    }

    .hero-graphic {
        max-width: 200px;
    }

    .main-content {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .section {
        min-height: auto;
        padding: var(--spacing-lg) 0;
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .section-title {
        font-size: clamp(1.2rem, 3vw, 1.8rem);
    }

    .hero-section {
        min-height: 60vh;
        padding: var(--spacing-lg) 0;
    }

    .nav-primary {
        flex-wrap: wrap;
    }

    body {
        background-size: 20px 20px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    body::before {
        animation: none;
    }

    .hero-graphic {
        animation: none;
    }
}

/* ============================================
   Utility Classes
   ============================================ */

.opacity-muted {
    opacity: 0.6;
}

.text-accent {
    color: var(--color-accent-cyan);
}

.text-success {
    color: var(--color-accent-lime);
}

.text-warning {
    color: var(--color-accent-magenta);
}

.text-info {
    color: var(--color-accent-teal);
}

/* Smooth scrolling for all browsers */
@supports (scroll-behavior: smooth) {
    html {
        scroll-behavior: smooth;
    }
}