:root {
    --primary: #f97316;
    --primary-dark: #ea580c;
    --bg: #f8f9fa;
    --card: #ffffff;
    --text: #0f172a;
    --text-muted: #475569;
    --border: #e2e8f0;
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #eab308;
}

.dark {
    --bg: #111827;
    --card: #1f2937;
    --text: #f3f4f6;
    --text-muted: #9ca3af;
    --border: #374151;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    transition: background 0.4s, color 0.4s;
    font-size: clamp(15px, 2.5vw, 16px);
}

.navbar {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.logo {
    font-size: clamp(1.35rem, 4vw, 1.55rem);
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary);
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: clamp(1rem, 4vw, 2rem);
}

.section-title {
    font-size: clamp(1.75rem, 5vw, 2.25rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    transition: transform 0.25s;
}

.card:hover {
    transform: translateY(-5px);
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.button {
    padding: 0.7rem 1.4rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.button.primary {
    background: var(--primary);
    color: white;
}

.button.primary:hover {
    background: var(--primary-dark);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
}

.modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--card);
    width: 90%;
    max-width: 480px;
    border-radius: 12px;
    padding: 1.75rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.close {
    float: right;
    font-size: 1.8rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .hamburger { display: block; }
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card);
        flex-direction: column;
        padding: 1rem;
        transform: translateY(-100%);
        transition: transform 0.3s;
    }
    .nav-links.active { transform: translateY(0); }
    .cards { grid-template-columns: 1fr; }
    .analytics-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .container { padding: 1rem; }
    .summary-stats { grid-template-columns: 1fr; }
}