@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* Base Obsidian Palette */
    --bg-base: #090d16;
    --bg-card: rgba(18, 24, 39, 0.72);
    --bg-card-hover: rgba(24, 33, 53, 0.85);
    --bg-header: rgba(13, 18, 30, 0.85);
    
    /* Typography */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Accents & Gradients */
    --accent-indigo: #6366f1;
    --accent-cyan: #06b6d4;
    --accent-glow: rgba(99, 102, 241, 0.35);
    --accent-cyan-glow: rgba(6, 182, 212, 0.3);
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    --accent-gradient-hover: linear-gradient(135deg, #4f46e5 0%, #0891b2 100%);
    
    /* Borders & Double-Bezel Insets */
    --border-hairline: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(99, 102, 241, 0.35);
    --inner-glow: inset 0 1px 1px rgba(255, 255, 255, 0.12);
    --card-shadow: 0 12px 35px -5px rgba(0, 0, 0, 0.45);
    
    /* Status Colors */
    --status-success-bg: rgba(16, 185, 129, 0.12);
    --status-success-text: #34d399;
    --status-success-border: rgba(52, 211, 153, 0.28);
    
    --status-warning-bg: rgba(245, 158, 11, 0.12);
    --status-warning-text: #fbbf24;
    --status-warning-border: rgba(251, 191, 36, 0.28);
    
    --status-danger-bg: rgba(244, 63, 94, 0.10);
    --status-danger-text: #fda4af;
    --status-danger-border: rgba(244, 63, 94, 0.22);
}

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-base);
    background-image: 
        radial-gradient(at 15% 10%, rgba(99, 102, 241, 0.16) 0px, transparent 55%),
        radial-gradient(at 85% 20%, rgba(6, 182, 212, 0.12) 0px, transparent 50%),
        radial-gradient(at 50% 80%, rgba(99, 102, 241, 0.08) 0px, transparent 60%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.65;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Header Section */
header {
    text-align: center;
    padding: 6rem 2rem 4rem;
    position: relative;
}

header::before {
    content: '';
    position: absolute;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 650px;
    height: 450px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    z-index: -1;
    filter: blur(90px);
    opacity: 0.65;
    pointer-events: none;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.2rem;
    background: linear-gradient(135deg, #ffffff 30%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.03em;
    line-height: 1.15;
}

.subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto;
    font-weight: 400;
    line-height: 1.7;
}

.subtitle strong {
    color: #e2e8f0;
    font-weight: 600;
}

/* Main Container */
main {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 2rem 6rem;
}

.section-title {
    font-size: 1.85rem;
    font-weight: 700;
    margin: 4.5rem 0 1rem;
    position: relative;
    display: inline-block;
    letter-spacing: -0.02em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 44px;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 4px;
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
}

/* Card Styling (Double-Bezel Depth) */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-hairline);
    border-radius: 20px;
    padding: 2.2rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--card-shadow), var(--inner-glow);
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    background: var(--bg-card-hover);
    border-color: var(--border-highlight);
    box-shadow: 0 20px 45px -5px rgba(0, 0, 0, 0.6), 0 0 25px var(--accent-glow), var(--inner-glow);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.card h3 {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.badge {
    background: rgba(99, 102, 241, 0.12);
    color: #a5b4fc;
    padding: 0.3rem 0.85rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    border: 1px solid rgba(99, 102, 241, 0.28);
    letter-spacing: 0.04em;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
    line-height: 1.65;
}

.process {
    background: rgba(10, 14, 26, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 1.1rem;
    margin-bottom: 1.8rem;
    font-size: 0.85rem;
    color: #cbd5e1;
    border-left: 3px solid var(--accent-cyan);
}

.process strong {
    color: #f1f5f9;
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
}

/* Primary Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    color: #ffffff;
    text-decoration: none;
    padding: 0.85rem 1.75rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 15px var(--accent-glow);
    margin-top: auto;
    border: none;
}

.btn:hover {
    background: var(--accent-gradient-hover);
    box-shadow: 0 6px 25px var(--accent-glow), 0 0 20px var(--accent-cyan-glow);
    transform: translateY(-2px);
}

/* Visualization Cards */
.viz-card {
    background: var(--bg-card);
    border: 1px solid var(--border-hairline);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(16px);
    box-shadow: var(--card-shadow), var(--inner-glow);
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.viz-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
    box-shadow: 0 20px 45px -5px rgba(0, 0, 0, 0.6), var(--inner-glow);
}

.viz-img-container {
    width: 100%;
    height: 310px;
    overflow: hidden;
    position: relative;
    background: #ffffff;
    border-bottom: 1px solid var(--border-hairline);
}

.viz-img-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 0.75rem;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.viz-card:hover .viz-img-container img {
    transform: scale(1.04);
}

.viz-content {
    padding: 1.8rem;
}

.viz-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    letter-spacing: -0.01em;
}

.viz-content p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}

/* Master Data Table & Feasibility Matrix */
.table-container {
    width: 100%;
    overflow-x: auto;
    background: var(--bg-card);
    border: 1px solid var(--border-hairline);
    border-radius: 20px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    margin: 2rem 0 4rem;
    box-shadow: var(--card-shadow), var(--inner-glow);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    min-width: 960px;
}

.data-table th {
    background: var(--bg-header);
    color: #f1f5f9;
    padding: 1.15rem 1.3rem;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.data-table td {
    padding: 1.15rem 1.3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.92rem;
    vertical-align: middle;
    color: #e2e8f0;
}

.data-table tbody tr {
    transition: background 0.25s ease;
}

.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.035);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table code {
    background: rgba(99, 102, 241, 0.12);
    color: #a5b4fc;
    padding: 0.15rem 0.4rem;
    border-radius: 5px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82em;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* Status Badges */
.badge-success {
    background: var(--status-success-bg);
    color: var(--status-success-text);
    border: 1px solid var(--status-success-border);
    padding: 0.35rem 0.8rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.badge-warning {
    background: var(--status-warning-bg);
    color: var(--status-warning-text);
    border: 1px solid var(--status-warning-border);
    padding: 0.35rem 0.8rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.badge-danger {
    background: var(--status-danger-bg);
    color: var(--status-danger-text);
    border: 1px solid var(--status-danger-border);
    padding: 0.35rem 0.8rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

/* Small Table Buttons */
.btn-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    color: #ffffff;
    text-decoration: none;
    padding: 0.45rem 0.95rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
    margin: 0.2rem 0.3rem 0.2rem 0;
    box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-sm:hover {
    background: var(--accent-gradient-hover);
    box-shadow: 0 4px 15px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-sm.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: #e2e8f0;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: none;
}

.btn-sm.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

.btn-sm.btn-na {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-muted);
    border: 1px dashed rgba(255, 255, 255, 0.12);
    cursor: default;
    pointer-events: none;
    box-shadow: none;
}

.item-desc {
    color: var(--text-secondary);
    font-size: 0.83rem;
    margin-top: 0.3rem;
    line-height: 1.45;
}

/* Footer */
footer {
    text-align: center;
    padding: 4rem 2rem;
    border-top: 1px solid var(--border-hairline);
    color: var(--text-muted);
    font-size: 0.9rem;
    background: rgba(9, 13, 22, 0.8);
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.35rem;
    }
    .grid {
        grid-template-columns: 1fr;
    }
    main {
        padding: 0 1.25rem 4rem;
    }
}