/* Base Variables & Theme */
:root {
    --color-green: #0B6E4F;
    --color-green-dark: #084834;
    --color-charcoal: #1F2937;
    --color-charcoal-dark: #111827;
    --color-light: #F9FAFB;
    --color-gray: #E5E7EB;
    --color-white: #FFFFFF;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --border-radius-sm: 4px;
    --border-radius: 8px;
    
    --transition-standard: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-charcoal);
    background-color: var(--color-white);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-standard);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Utilities */
.bg-light { background-color: var(--color-light); }
.bg-charcoal { background-color: var(--color-charcoal); }
.bg-green { background-color: var(--color-green); }
.text-white { color: var(--color-white); }
.text-charcoal { color: var(--color-charcoal); }
.text-center { text-align: center; }

/* Backgrounds */
.grid-bg {
    background-image: 
        linear-gradient(to right, var(--color-gray) 1px, transparent 1px),
        linear-gradient(to bottom, var(--color-gray) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center top;
}

.grid-bg-dark {
    background-image: 
        linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center top;
}

/* Typography */
.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.25rem;
    color: #4B5563;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.75rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--color-green);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-green-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(11, 110, 79, 0.2);
}

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-charcoal);
    border-color: var(--color-gray);
}

.btn-secondary:hover {
    background-color: var(--color-light);
    border-color: var(--color-charcoal);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-charcoal);
    color: var(--color-charcoal);
}

.btn-outline:hover {
    background-color: var(--color-charcoal);
    color: var(--color-white);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* Navbar */
.navbar {
    padding: var(--spacing-md) 0;
    position: absolute;
    width: 100%;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.05em;
}

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

.nav-links a:not(.btn) {
    font-size: 0.875rem;
    font-weight: 500;
    color: #4B5563;
}

.nav-links a:not(.btn):hover {
    color: var(--color-charcoal);
}

/* Section Components */
section {
    padding: var(--spacing-xl) 0;
}

/* Section 1: Hero */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    border-bottom: 1px solid var(--color-gray);
}

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

.hero-headline {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subheadline {
    font-size: 1.25rem;
    color: #4B5563;
    margin-bottom: var(--spacing-lg);
    max-width: 90%;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
}

.hero-visual {
    position: relative;
    border: 1px solid var(--color-gray);
    background-color: var(--color-white);
    padding: var(--spacing-md);
    box-shadow: 0 20px 40px -10px rgba(0,0,0,0.05);
}

.transit-map {
    width: 100%;
    height: auto;
}

.transit-line {
    stroke: var(--color-gray);
    stroke-width: 4;
    stroke-linecap: round;
}

.node {
    fill: var(--color-white);
    stroke: var(--color-charcoal);
    stroke-width: 2;
}

.node-hub {
    stroke-width: 3;
}

.journey-pulse {
    fill: var(--color-green);
    animation: movePulse 4s infinite linear;
}

.journey-pulse.delay {
    animation-delay: 2s;
}

@keyframes movePulse {
    0% { transform: translateX(-50px); opacity: 0; }
    20% { opacity: 1; }
    80% { opacity: 1; }
    100% { transform: translateX(50px); opacity: 0; }
}

.map-overlay-card {
    position: absolute;
    bottom: -20px;
    left: 20px;
    background: var(--color-charcoal);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.card-status {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #9CA3AF;
    margin-bottom: 0.25rem;
}

.card-metric {
    font-weight: 600;
    font-size: 1rem;
}

/* Section 2: Problem */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.problem-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border: 1px solid var(--color-gray);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.problem-icon {
    font-size: 1.5rem;
    color: var(--color-charcoal);
    font-weight: 300;
}

.problem-card h3 {
    font-size: 1.25rem;
    font-weight: 400;
    color: #4B5563;
}

.problem-closing {
    margin-top: var(--spacing-lg);
    text-align: center;
    border-top: 1px solid var(--color-gray);
    padding-top: var(--spacing-md);
}

.closing-line {
    font-size: 1.5rem;
    color: #6B7280;
}

.closing-line strong {
    color: var(--color-charcoal);
}

/* Section 3: Category */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.pillar {
    padding: var(--spacing-md) 0;
    border-top: 2px solid var(--color-charcoal);
}

.pillar-number {
    font-size: 0.875rem;
    font-weight: 600;
    color: #9CA3AF;
    margin-bottom: var(--spacing-sm);
}

.pillar-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.pillar-desc {
    color: #4B5563;
}

/* Section 4: How It Works */
.steps-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 0 var(--spacing-sm);
}

.step-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-green);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.step-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.step-desc {
    color: #9CA3AF;
    font-size: 0.875rem;
}

.step-connector {
    flex: 0 0 100px;
    height: 1px;
    background: rgba(255,255,255,0.2);
    margin-top: 2rem;
}

/* Section 5: Metric */
.metric-comparison {
    display: flex;
    align-items: stretch;
    justify-content: center;
    max-width: 700px;
    margin: var(--spacing-lg) auto 0;
    background: var(--color-white);
    border: 1px solid var(--color-gray);
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.05);
}

.metric-box {
    flex: 1;
    padding: var(--spacing-lg);
}

.metric-divider {
    width: 1px;
    background: var(--color-gray);
}

.metric-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    opacity: 0.8;
}

.metric-value {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
}

/* Section 6: Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.feature-list {
    list-style: none;
    margin-top: var(--spacing-md);
}

.feature-list li {
    margin-bottom: var(--spacing-sm);
    padding-left: 1.5rem;
    position: relative;
    color: #4B5563;
}

.feature-dot {
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 6px;
    height: 6px;
    background-color: var(--color-charcoal);
    border-radius: 50%;
}

.feature-list li strong {
    color: var(--color-charcoal);
}

.mockup-window {
    background: var(--color-charcoal);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
}

.mockup-header {
    background: var(--color-charcoal-dark);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #374151;
}

.mockup-title {
    color: #9CA3AF;
    font-size: 0.75rem;
    margin-left: auto;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.mockup-body {
    padding: var(--spacing-md);
    background: #1F2937;
    display: grid;
    gap: var(--spacing-sm);
}

.dashboard-panel {
    background: rgba(255,255,255,0.05);
    padding: var(--spacing-sm);
    border: 1px solid rgba(255,255,255,0.1);
}

.panel-header {
    color: var(--color-white);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: space-between;
}

.risk-bar {
    height: 4px;
    background: #374151;
    margin-bottom: 0.5rem;
    position: relative;
    overflow: hidden;
}

.risk-bar.high::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 85%;
    background: #EF4444; /* Alert Red */
}

.panel-data {
    color: #9CA3AF;
    font-size: 0.75rem;
    margin-bottom: var(--spacing-sm);
}

.action-btn {
    display: inline-block;
    background: var(--color-white);
    color: var(--color-charcoal);
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-indicator {
    color: var(--color-green);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-indicator::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-green);
}

/* Section 7: Passenger */
.indicator-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    max-width: 800px;
    margin: var(--spacing-lg) auto 0;
}

.indicator-card {
    padding: var(--spacing-lg) var(--spacing-md);
    background: var(--color-light);
    border: 1px solid var(--color-gray);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.status-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.status-circle.status-green { background: #10B981; }
.status-circle.status-yellow { background: #F59E0B; }
.status-circle.status-red { background: #EF4444; }

.indicator-title {
    font-size: 1.125rem;
    font-weight: 500;
}

/* Section 8: Why It Matters */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    max-width: 800px;
    margin: var(--spacing-lg) auto 0;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    font-size: 1.125rem;
}

.benefit-icon {
    width: 24px;
    height: 24px;
    color: var(--color-green);
}

/* Section 9: Pilot */
.pilot-container {
    max-width: 600px;
}

.pilot-text {
    font-size: 1.25rem;
    color: #4B5563;
    margin-bottom: var(--spacing-lg);
}

/* Section 10: Footer */
.footer {
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid var(--color-gray);
    background: var(--color-white);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.footer-info {
    font-size: 0.875rem;
    color: #6B7280;
}

.footer-info strong {
    color: var(--color-charcoal);
    font-size: 1rem;
}

.footer-tagline {
    font-size: 0.875rem;
    color: #9CA3AF;
    font-style: italic;
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }

/* Responsive adjustments */
@media (max-width: 900px) {
    .hero-container, .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-headline {
        font-size: 3rem;
    }
    
    .pillars-grid, .indicator-grid, .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .problem-grid {
        grid-template-columns: 1fr;
    }

    .steps-wrapper {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }

    .step-connector {
        display: none;
    }
    
    .metric-comparison {
        flex-direction: column;
    }
    
    .metric-divider {
        width: 100%;
        height: 1px;
    }
}