:root {
    --bg-deep-navy: #0F172A;
    --bg-surface: #111827;
    --primary-blue: #2563EB;
    --primary-hover: #1D4ED8;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --text-main: #FFFFFF;
    --text-muted: #94A3B8;
    --border-color: #1E293B;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-deep-navy);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-success { color: var(--success); }
.mt-5 { margin-top: 3rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}
.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}
.btn-primary {
    background-color: var(--primary-blue);
    color: white;
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}
.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-blue);
    color: var(--primary-blue);
}
.btn-outline:hover {
    background-color: rgba(37, 99, 235, 0.1);
    transform: translateY(-2px);
}
.btn-glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
}
.btn-glass:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}
.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
}
.nav-links a {
    margin: 0 1rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}
.nav-links a:hover {
    color: var(--text-main);
}
.nav-actions .btn {
    margin-left: 1rem;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    min-height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
}
.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #FFFFFF, #94A3B8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}
.hero-text p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 500px;
}
.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Mock Dashboard Visual */
.hero-visual {
    perspective: 1000px;
}
.mock-dashboard {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: rotateY(-15deg) rotateX(5deg);
    transition: transform 0.5s ease;
}
.mock-dashboard:hover {
    transform: rotateY(0) rotateX(0);
}
.mock-header {
    height: 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    margin-bottom: 1.5rem;
}
.mock-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.mock-card {
    height: 80px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}
.mock-chart {
    height: 150px;
    background: linear-gradient(180deg, rgba(37, 99, 235, 0.1) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 8px;
}

/* Sections Common */
section {
    padding: 100px 0;
}
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
}
.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-top: -2rem;
    margin-bottom: 3rem;
}

/* Platform Overview */
.overview-section {
    background-color: var(--bg-surface);
}
.overview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.card {
    background: var(--bg-deep-navy);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    transition: all 0.3s ease;
}
.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-blue);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.1);
}
.card-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}
.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}
.card p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}
.learn-more {
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 0.95rem;
}

/* Operations Center Section */
.ops-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.feature-list {
    list-style: none;
    margin-top: 2rem;
}
.feature-list li {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
    position: relative;
    color: var(--text-muted);
}
.feature-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
}
.feature-list li strong {
    color: var(--text-main);
}
.kpi-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}
.kpi-box {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
}
.kpi-box:first-child {
    grid-column: 1 / -1;
}
.kpi-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}
.kpi-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
}

/* Analytics Section */
.analytics-section {
    background: var(--bg-surface);
}
.analytics-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}
.stat-card {
    background: var(--bg-deep-navy);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 12px;
}
.stat-title {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}
.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.stat-trend {
    font-size: 0.85rem;
    font-weight: 500;
}
.positive { color: var(--success); }
.neutral { color: var(--text-muted); }

/* Partner Flowchart */
.flowchart {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4rem;
    padding: 0 2rem;
}
.flow-step {
    text-align: center;
    position: relative;
    z-index: 2;
}
.step-circle {
    width: 60px;
    height: 60px;
    background: var(--bg-surface);
    border: 2px solid var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}
.flow-connector {
    flex: 1;
    height: 2px;
    background: var(--border-color);
    margin: 0 1rem;
    position: relative;
    top: -20px;
}
.flow-step h4 {
    margin-bottom: 0.5rem;
}
.flow-step p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Why DON49 Section */
.why-section {
    background: var(--bg-deep-navy);
}
.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.why-item {
    background: var(--bg-surface);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-blue);
}
.why-item h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}
.why-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    background: #0B1120;
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}
.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4rem;
}
.footer-brand h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}
.footer-brand p {
    color: var(--text-muted);
}
.footer-links {
    display: flex;
    gap: 4rem;
}
.link-group h4 {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}
.link-group a {
    display: block;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}
.link-group a:hover {
    color: var(--primary-blue);
}
.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content, .ops-content {
        grid-template-columns: 1fr;
    }
    .hero-text h1 { font-size: 2.5rem; }
    .hero-visual { display: none; }
    .overview-grid, .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .analytics-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .overview-grid, .why-grid {
        grid-template-columns: 1fr;
    }
    .analytics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .flowchart {
        flex-direction: column;
        gap: 2rem;
    }
    .flow-connector {
        width: 2px;
        height: 40px;
        top: 0;
        margin: 0.5rem 0;
    }
    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }
    .footer-links {
        flex-wrap: wrap;
    }
}