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

:root {
    --bg: #0f1117;
    --bg-card: #1a1d27;
    --bg-card-hover: #222636;
    --border: #2a2e3d;
    --text: #e4e6f0;
    --text-muted: #8b8fa3;
    --primary: #6c63ff;
    --primary-hover: #5a52d5;
    --danger: #ff4757;
    --danger-hover: #e03e4d;
    --success: #2ed573;
    --warning: #ffa502;
    --info: #1e90ff;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --transition: 0.2s ease;
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== Navbar ===== */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-brand h1 {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-icon {
    font-size: 1.5rem;
    color: var(--danger);
}

.nav-actions { display: flex; gap: 0.75rem; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.82rem; }

.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); }

.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-danger:hover { background: var(--danger-hover); }

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-outline:hover { background: var(--bg-card-hover); }

.btn-block { width: 100%; justify-content: center; }

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== Container ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ===== Risk Banner ===== */
.risk-banner {
    display: flex;
    align-items: center;
    gap: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.risk-gauge-container {
    position: relative;
    width: 180px;
    height: 180px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.risk-gauge-container canvas {
    position: absolute;
    top: 0;
    left: 0;
}

.risk-score-text {
    font-size: 2.5rem;
    font-weight: 800;
    z-index: 1;
    line-height: 1;
}

.risk-label {
    position: absolute;
    bottom: 20px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    z-index: 1;
}

.risk-details h2 {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
}

.risk-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.contributing-factors {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.factor-tag {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    background: rgba(108, 99, 255, 0.15);
    border: 1px solid rgba(108, 99, 255, 0.3);
    border-radius: 20px;
    font-size: 0.78rem;
    color: var(--primary);
}

/* ===== Stat Cards ===== */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem;
    text-align: center;
    transition: all var(--transition);
}

.stat-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.stat-icon { font-size: 1.5rem; margin-bottom: 0.5rem; }

.stat-info {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.3rem;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
}

.stat-unit {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ===== Charts ===== */
.charts-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.bottom-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.chart-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    position: relative;
}

.chart-wrap {
    position: relative;
    height: 200px;
    width: 100%;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.chart-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.select-sm {
    padding: 0.3rem 0.6rem;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
}

/* ===== Forms ===== */
.health-form { max-height: 500px; overflow-y: auto; }

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.5rem 0.7rem;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-family: var(--font);
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

input[type="range"] {
    -webkit-appearance: none;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    border: none;
    padding: 0;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.4rem;
}

.checkbox-grid label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    color: var(--text);
    cursor: pointer;
}

/* ===== Migraine Table ===== */
.migraine-table-wrap {
    max-height: 350px;
    overflow-y: auto;
}

.migraine-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.migraine-table th {
    text-align: left;
    padding: 0.6rem;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg-card);
}

.migraine-table td {
    padding: 0.6rem;
    border-bottom: 1px solid var(--border);
}

.severity-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 12px;
    font-size: 0.78rem;
    font-weight: 600;
    min-width: 2rem;
    text-align: center;
}

.severity-low { background: rgba(46, 213, 115, 0.2); color: var(--success); }
.severity-med { background: rgba(255, 165, 2, 0.2); color: var(--warning); }
.severity-high { background: rgba(255, 71, 87, 0.2); color: var(--danger); }

.trigger-tag {
    display: inline-block;
    padding: 0.1rem 0.4rem;
    margin: 0.1rem;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    font-size: 0.72rem;
}

.btn-delete-sm {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.2rem;
    transition: color var(--transition);
}
.btn-delete-sm:hover { color: var(--danger); }

.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.modal-overlay.hidden { display: none; }

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    width: 90%;
    max-width: 640px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color var(--transition);
}
.modal-close:hover { color: var(--text); }

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 0.8rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    font-size: 0.9rem;
    z-index: 300;
    transition: opacity 0.3s, transform 0.3s;
}
.toast.hidden { opacity: 0; transform: translateY(20px); pointer-events: none; }
.toast.show { opacity: 1; transform: translateY(0); }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .stat-cards { grid-template-columns: repeat(3, 1fr); }
    .charts-row, .bottom-row { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .navbar { padding: 0.8rem 1rem; flex-wrap: wrap; gap: 0.5rem; }
    .stat-cards { grid-template-columns: repeat(2, 1fr); }
    .risk-banner { flex-direction: column; text-align: center; }
    .container { padding: 1rem; }
    .form-grid { grid-template-columns: 1fr; }
    .checkbox-grid { grid-template-columns: repeat(2, 1fr); }
}