/* SocienceAI 共用样式表 - 2026-01-17 */
:root {
    --primary: #3b82f6;
    --primary-dark: #1d4ed8;
    --secondary: #6366f1;
    --accent: #0ea5e9;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #dc3545;
    --info: #17a2b8;
    --light: #f8f9fa;
    --border: #dee2e6;
    --text: #1f2937;
    --text-light: #6c757d;
    --text-muted: #9ca3af;
    --white: #ffffff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--light);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 8px;
    border: 2px solid var(--primary);
    background-color: var(--primary);
    color: var(--white);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

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

.input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s ease;
    font-family: inherit;
}

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

.card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

.card:hover {
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 20px;
    background-color: var(--info);
    color: var(--white);
}

.badge.success { background-color: var(--success); }
.badge.warning { background-color: var(--warning); }
.badge.danger { background-color: var(--danger); }