.settings-page {
    max-width: 480px;
    margin: 60px auto;
    padding: 0 24px;
}

.settings-page h1 {
    font-size: 28px;
    color: #111827;
    margin-bottom: 32px;
    text-align: center;
}

.settings-guard {
    text-align: center;
    color: #6b7280;
    font-size: 15px;
}

.settings-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 24px;
}

.settings-field {
    padding: 16px 0;
    border-bottom: 1px solid #f1f5f9;
}

.settings-field:last-child {
    border-bottom: none;
}

.settings-field-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}

/* Display mode — name + pencil */
.settings-display-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.settings-display-value {
    font-size: 16px;
    color: #111827;
    font-weight: 500;
}

.settings-edit-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    color: #94a3b8;
    display: flex;
    align-items: center;
    border-radius: 6px;
    transition: background 0.15s, color 0.15s;
}

.settings-edit-btn:hover {
    background: #f1f5f9;
    color: #111827;
}

/* Edit mode — input + save/cancel */
.settings-edit-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.settings-edit-row[hidden] {
    display: none;
}

.settings-edit-row input,
.settings-edit-row select {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    color: #111827;
    outline: none;
    transition: border-color 0.15s;
    background: #ffffff;
}

.settings-edit-row input:focus,
.settings-edit-row select:focus {
    border-color: #9ca3af;
}

.settings-save-btn {
    padding: 8px 14px;
    background: #111827;
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
    white-space: nowrap;
}

.settings-save-btn:hover {
    background: #1f2937;
}

.settings-cancel-btn {
    padding: 8px 12px;
    background: none;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 14px;
    color: #6b7280;
    cursor: pointer;
    transition: background 0.15s;
}

.settings-cancel-btn:hover {
    background: #f1f5f9;
}

.settings-feedback {
    font-size: 13px;
    margin-top: 8px;
    margin-bottom: 0;
}

.settings-feedback--success {
    color: #166534;
}

.settings-feedback--error {
    color: #991b1b;
}

/* HSK levels field */
.settings-field-hint {
    font-size: 13px;
    color: #6b7280;
    margin: 4px 0 12px;
    line-height: 1.5;
}

.settings-hsk-checkboxes {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px 16px;
}

.settings-hsk-checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    white-space: nowrap;
    cursor: pointer;
    flex-shrink: 0;
}

.settings-hsk-checkbox-label input[type="checkbox"] {
    cursor: pointer;
}

.settings-toggle-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    cursor: pointer;
}

.settings-toggle-row input[type="checkbox"] {
    cursor: pointer;
}

/* Day-rollover field: timezone row, day-start-hour row, sublabels */
.settings-field-sublabel {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: #6b7280;
    margin-bottom: 6px;
}

.settings-timezone-row {
    margin-bottom: 16px;
}

.settings-day-start-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.settings-day-start-row select {
    padding: 6px 10px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    color: #111827;
    background: #ffffff;
    cursor: pointer;
}

.settings-auto-badge {
    font-size: 11px;
    font-weight: 600;
    color: #6b7280;
    background: #f1f5f9;
    padding: 2px 8px;
    border-radius: 999px;
    text-transform: lowercase;
}

/* Advanced scheduling section — collapsed <details> by default, since
   these are easy-to-misconfigure power-user settings that shouldn't
   compete for attention with the simpler toggles above. */
.settings-advanced {
    padding-top: 16px;
}

.settings-advanced-summary {
    font-size: 12px;
    font-weight: 600;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.settings-advanced-summary::-webkit-details-marker {
    display: none;
}

.settings-advanced-summary::before {
    content: "▸";
    font-size: 10px;
    transition: transform 0.15s;
}

.settings-advanced[open] .settings-advanced-summary::before {
    transform: rotate(90deg);
}

.settings-scheduling-group {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #f1f5f9;
}

.settings-scheduling-group:first-of-type {
    margin-top: 16px;
}

.settings-scheduling-group-title {
    font-size: 14px;
    font-weight: 600;
    color: #111827;
    margin: 0 0 12px;
}

.settings-scheduling-row {
    margin-bottom: 16px;
}

.settings-scheduling-row:last-child {
    margin-bottom: 0;
}

.settings-scheduling-row label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: #374151;
    margin-bottom: 6px;
}

.settings-scheduling-row input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    color: #111827;
    outline: none;
    transition: border-color 0.15s;
    background: #ffffff;
    box-sizing: border-box;
}

.settings-scheduling-row input:focus {
    border-color: #9ca3af;
}

.settings-scheduling-row .settings-field-hint {
    margin: 6px 0 0;
}

.settings-scheduling-actions {
    display: flex;
    gap: 8px;
    margin-top: 20px;
}

/* Time-to-mastery calculator — sits at the end of the Advanced
   scheduling section, styled as its own settings-scheduling-group so it
   visually matches the Learning steps / Intervals / Ease & mastery
   groups above it rather than looking like a bolted-on afterthought. */

.settings-calculator {
    margin-top: 8px;
    padding-top: 20px;
    border-top: 1px solid #f1f5f9;
}

.settings-calculator-caveat {
    font-size: 12px;
    color: #94a3b8;
    margin: 10px 0 0;
}

.settings-calculator-results {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
}

.settings-calculator-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-top: 1px solid #f1f5f9;
}

.settings-calculator-row:first-child {
    border-top: none;
}

.settings-calculator-icon {
    font-size: 18px;
    flex-shrink: 0;
}

/* Fastest (Easy) to slowest (Forget) — the color ramp mirrors the row
   order itself (see SCENARIO_ORDER in settings.html), so relative
   friction reads at a glance without needing every number read closely. */
.settings-calculator-icon--green { color: #16a34a; }
.settings-calculator-icon--blue { color: #185fa5; }
.settings-calculator-icon--amber { color: #ea580c; }
.settings-calculator-icon--coral { color: #dc2626; }

.settings-calculator-label {
    font-size: 13px;
    color: #374151;
    flex: 1;
}

.settings-calculator-days {
    font-size: 14px;
    font-weight: 600;
    color: #111827;
}

.settings-calculator-reviews {
    font-size: 12px;
    color: #94a3b8;
    min-width: 64px;
    text-align: right;
}

.settings-calculator-results[hidden] {
    display: none;
}