:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --background-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-color: #333333;
    --border-color: #dee2e6;
    --shadow-color: rgba(0,0,0,0.1);

    /* Semantic colour tokens */
    --danger-color: #e74c3c;
    --warning-color: #fd7e14;
    --info-color: #3498db;
    --muted-text: #6c757d;
    --link-color: #0b5cab;
    --danger-bg: #fff5f5;
    --success-bg: #e8f5e9;
    --warning-bg: #fff8e1;
    --info-bg: #f3f8ff;
    --hover-bg: #f8f9fa;
    --header-bg: #f1f3f5;
    --input-border: #ced4da;
    --focus-ring: #3498db;

    /* Sidebar gradient tokens */
    --sidebar-gradient-start: rgb(5,39,103);
    --sidebar-gradient-end: #3a0647;

    /* Spacing scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* ── Heading scale ───────────────────────────────────── */
h1 { font-size: 1.5rem;  font-weight: 600; color: var(--text-color); margin-bottom: var(--space-md); }
h2 { font-size: 1.25rem; font-weight: 600; color: var(--text-color); margin-bottom: var(--space-sm); }
h3 { font-size: 1.1rem;  font-weight: 600; color: var(--text-color); margin-bottom: var(--space-sm); }
h4 { font-size: 1rem;    font-weight: 600; color: var(--text-color); margin-bottom: var(--space-xs); }
h5 { font-size: 0.9rem;  font-weight: 600; color: var(--text-color); margin-bottom: var(--space-xs); }

.page-subtitle {
    font-size: 0.9rem;
    color: var(--muted-text);
    margin: var(--space-xs) 0 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--secondary-color);
}

.search-container {
    margin-bottom: 1.5rem;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.search-input:focus {
    border-color: var(--secondary-color);
}

.table-container {
    background-color: var(--surface-color);
    border-radius: 12px;
    overflow-x: auto;
    margin-top: 1rem;
}

.clinic-table {
    width: 100%;
    border-collapse: collapse;
}

.clinic-table th {
    background-color: var(--header-bg);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

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

.clinic-table tbody tr:hover {
    background-color: var(--hover-bg);
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s;
    cursor: pointer;
    border: none;
}

.btn:hover {
    opacity: 0.85;
    filter: brightness(0.95);
}

.btn:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

.btn-outline:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
    background: var(--hover-bg);
}

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

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--secondary-color);
    color: var(--secondary-color);
}

/* Button class order: .btn .btn-sm .btn-{variant} [spacing utilities] */
.btn-sm {
    padding: 0.2rem 0.6rem;
    font-size: 0.8rem;
    border-radius: 4px;
}

.btn-xs {
    padding: 0.15rem 0.4rem;
    font-size: 0.7rem;
    border-radius: 3px;
}

.actions-cell {
    display: flex;
    gap: 0.5rem;
}

.shadow {
    box-shadow: 0 4px 6px var(--shadow-color);
}

.text-center {
    text-align: center;
}

.form-container {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 3px var(--shadow-color);
    padding: var(--space-xl);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Regimen/medication sections need wider minimum to avoid truncation at 550–900px */
.form-grid--regimen {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

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

.full-width {
    grid-column: 1 / -1;
}

.form-control {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
}

.form-select {
    display: block;
    width: 100%;
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    font-size: 0.95rem;
    color: var(--text-color);
    background-color: var(--surface-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23333333' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    appearance: none;
    transition: border-color 0.15s ease;
}

.form-select:focus {
    border-color: var(--focus-ring);
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.15);
}

.form-select-sm {
    padding: 0.25rem 1.75rem 0.25rem 0.5rem;
    font-size: 0.8rem;
    border-radius: 4px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.patient-summary {
    background-color: var(--info-bg);
    padding: 1rem 2rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--secondary-color);
}

.details-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 900px) {
    .details-grid {
        grid-template-columns: 1fr;
    }
}

/* ── Card system ─────────────────────────────────────── */
.detail-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 3px var(--shadow-color);
    padding: var(--space-lg);
}

.detail-card--compact {
    padding: var(--space-md);
}

.detail-card--header {
    padding: var(--space-md) var(--space-lg);
}

.detail-card--interactive {
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    cursor: pointer;
}
.detail-card--interactive:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.detail-card--empty {
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    color: var(--muted-text);
    border-style: dashed;
}

.detail-card--empty-compact {
    text-align: center;
    padding: var(--space-md);
    color: var(--muted-text);
    border-style: dashed;
}

.detail-card h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--primary-color);
}

.list-unstyled {
    list-style: none;
    padding: 0;
    margin: 0;
}

.list-unstyled li {
    margin-bottom: 0.5rem;
}

.visit-history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.visit-item {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.visit-date {
    font-weight: 600;
    color: var(--secondary-color);
    margin-right: 1rem;
}

.problem-source {
    font-weight: 600;
    margin-top: 1rem;
    color: var(--primary-color);
}

.problem-list {
    margin-bottom: 0.5rem;
}

.account-form-container {
    max-width: 400px;
    margin: 4rem auto;
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 10px 25px var(--shadow-color);
}

.account-form-container h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
}

.alert-danger {
    background-color: var(--danger-bg);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.alert-success {
    background-color: var(--success-bg);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.alert-warning {
    background-color: var(--warning-bg);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.alert-info {
    background-color: var(--info-bg);
    color: var(--secondary-color);
    border: 1px solid var(--secondary-color);
}

.mb-3 {
    margin-bottom: 1rem;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-check-input {
    width: 1rem;
    height: 1rem;
}

.validation-message {
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.validation-summary-errors {
    color: var(--danger-color);
    background-color: var(--danger-bg);
    border: 1px solid var(--danger-color);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.validation-summary-errors ul {
    margin-bottom: 0;
    padding-left: 1.5rem;
}

.sig-input-wrapper {
    position: relative;
}

.sig-feedback {
    font-size: 0.7rem;
    color: var(--success-color);
    font-style: italic;
    margin-top: 2px;
    line-height: 1.2;
}

.sig-error {
    font-size: 0.7rem;
    color: var(--danger-color);
    margin-top: 2px;
    line-height: 1.2;
}

.input-validation-error {
    border-color: var(--danger-color);
}

/* Shared pager controls */
.pager {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}
.pager-info {
    font-size: 0.9rem;
    color: var(--muted-text);
}
.pager-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.pager-page-size {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin: 0;
}
.pager-page-size-label {
    font-size: 0.85rem;
    color: var(--muted-text);
    white-space: nowrap;
}
.pager-page-size-select {
    width: auto;
    min-width: 4.5rem;
}

/* Password visibility toggle */
.password-wrapper {
    position: relative;
}
.password-wrapper .form-control {
    padding-right: 2.75rem;
}
.password-toggle-btn {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    padding: 0.25rem 0.375rem;
    color: var(--muted-text);
    cursor: pointer;
    line-height: 1;
}
.password-toggle-btn:hover {
    color: var(--text-color);
}

.state-panel-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--space-xs);
}

.state-panel-copy {
    font-size: 0.9rem;
    color: var(--muted-text);
}

/* ── Accessibility utilities ─────────────────────────── */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

fieldset {
    border: none;
    padding: 0;
    margin: 0;
}

fieldset legend {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--space-sm);
    padding: 0;
}