/* Power Flow Visualization - Main Styles */

/* CSS Variables */
:root {
    --bg-dark: #0a0a0f;
    --bg-card: #12121a;
    --bg-surface: #1a1a25;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #2d2d3d;
}

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

body {
    font-family: 'Noto Sans JP', 'JetBrains Mono', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 60px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.logo-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Card Grid */
.visualizers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

/* Card Component */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    border-color: var(--accent-blue);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
}

.card-icon--blue { background: var(--accent-blue); }
.card-icon--green { background: var(--accent-green); }
.card-icon--purple { background: var(--accent-purple); }
.card-icon--cyan { background: var(--accent-cyan); }
.card-icon--red { background: var(--accent-red); }
.card-icon--orange { background: var(--accent-orange); }

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.card-features {
    list-style: none;
    margin-bottom: 20px;
}

.card-features li {
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 3px 0;
}

.card-features li::before {
    content: "\2713";
    color: var(--accent-green);
    font-weight: bold;
    margin-right: 8px;
}

.card-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: transform 0.3s ease, opacity 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-1px);
    opacity: 0.9;
}

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

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

/* Documentation Section */
.documentation {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px;
}

.doc-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--accent-orange);
}

.doc-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.doc-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    transition: border-color 0.3s ease, background 0.3s ease;
}

.doc-link:hover {
    border-color: var(--accent-cyan);
    background: var(--bg-card);
}

.doc-link small {
    color: var(--text-muted);
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    margin-top: 15px;
    transition: color 0.3s ease;
}

.github-link:hover {
    color: var(--accent-blue);
}

/* Animation States */
.card[data-animate] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.card[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .visualizers {
        grid-template-columns: 1fr;
    }

    .title {
        font-size: 2rem;
    }

    .logo {
        flex-direction: column;
        text-align: center;
    }
}