:root {
    --color-bg: #0a0e27;
    --color-bg-secondary: #151935;
    --color-bg-tertiary: #1e2340;
    --color-primary: #3b82f6;
    --color-secondary: #8b5cf6;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-text: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-border: #2d3550;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: var(--font-main);
    background: linear-gradient(135deg, var(--color-bg) 0%, #1a1f3a 100%);
    color: var(--color-text);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--color-bg-secondary);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.header-content {
    margin-bottom: 2rem;
}

.logo {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.logo-icon {
    font-size: 3rem;
    filter: drop-shadow(0 4px 8px rgba(59, 130, 246, 0.3));
}

.tagline {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Header Stats */
.header-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.stat {
    background: var(--color-bg-tertiary);
    padding: 1.25rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-primary);
}

.stat-value.exploited {
    color: var(--color-danger);
}

/* Controls */
.controls {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.select {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-main);
}

.select:hover {
    border-color: var(--color-primary);
}

.select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-main);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-icon {
    font-size: 1.2rem;
}

/* Loading & Error */
.loading {
    text-align: center;
    padding: 4rem 2rem;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--color-danger);
    color: var(--color-danger);
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    text-align: center;
}

/* Vulnerabilities Grid */
.vulnerabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.vuln-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.vuln-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-primary);
    transform: scaleY(0);
    transition: transform 0.3s;
}

.vuln-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.vuln-card:hover::before {
    transform: scaleY(1);
}

.vuln-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    gap: 1rem;
}

.vuln-id {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
}

.vuln-badges {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-critical { background: var(--color-danger); color: white; }
.badge-high { background: #dc2626; color: white; }
.badge-medium { background: var(--color-warning); color: black; }
.badge-low { background: var(--color-success); color: white; }
.badge-exploited { background: #dc2626; color: white; animation: pulse 2s infinite; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.vuln-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.vuln-description {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.vuln-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.vuln-source {
    font-weight: 500;
}

.vuln-date {
    font-family: var(--font-mono);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--color-bg-secondary);
    margin: 3% auto;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    width: 90%;
    max-width: 1200px;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    color: var(--color-text-secondary);
    float: right;
    font-size: 2rem;
    font-weight: 300;
    cursor: pointer;
    padding: 1rem;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--color-text);
}

#modalTitle {
    padding: 2rem 2rem 1rem;
    font-size: 1.75rem;
    color: var(--color-text);
}

.modal-body {
    padding: 1rem 2rem 2rem;
}

#diagramContainer {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    text-align: center;
}

#diagramContainer img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.diagram-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.diagram-meta button {
    flex: 1;
    min-width: 150px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--color-border);
}

.footer a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.footer a:hover {
    color: var(--color-secondary);
}

.footer-note {
    margin-top: 0.5rem;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .logo {
        font-size: 2rem;
    }

    .header-stats {
        grid-template-columns: 1fr;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .vulnerabilities-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
        margin: 5% auto;
    }
}