/* =============================================================================
   SleepGuardian — Settings & Goals Page Styles
   Follows the "Deep Night" design system
   ============================================================================= */

/* ── Settings Page Layout ──────────────────────────────────────────────────── */

.settings-page,
.goals-page {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-lg);
}

.settings-header {
    margin-bottom: var(--space-xl);
}

.settings-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 var(--space-xs);
}

.settings-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

/* ── Settings Grid ─────────────────────────────────────────────────────────── */

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

/* ── Settings Card ─────────────────────────────────────────────────────────── */

.settings-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.settings-card:hover {
    border-color: var(--border-medium);
    box-shadow: var(--shadow-md);
}

.settings-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-surface-raised);
    border-bottom: 1px solid var(--border-subtle);
}

.settings-card-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-icon {
    font-size: 1.25rem;
}

.settings-card-body {
    padding: var(--space-md) var(--space-lg);
}

/* ── Setting Row ───────────────────────────────────────────────────────────── */

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    gap: var(--space-md);
}

.setting-row + .setting-row {
    border-top: 1px solid var(--border-subtle);
}

.setting-row label:first-child {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.setting-control {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.setting-unit {
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 36px;
}

/* ── Setting Inputs ────────────────────────────────────────────────────────── */

.setting-input,
.setting-input-sm,
.setting-select {
    background: var(--bg-surface-raised);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    padding: var(--space-sm) var(--space-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.setting-input:focus,
.setting-input-sm:focus,
.setting-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.setting-input {
    width: 140px;
}

.setting-input-sm {
    width: 80px;
    text-align: center;
}

.setting-select {
    width: 170px;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239FA8DA' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

/* ── Range Slider ──────────────────────────────────────────────────────────── */

.range-control {
    flex: 1;
    max-width: 200px;
}

.setting-range {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-surface-raised);
    outline: none;
    cursor: pointer;
}

.setting-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 8px var(--primary-glow);
    transition: transform var(--transition-fast);
}

.setting-range::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.range-value {
    font-size: 0.8rem;
    color: var(--primary-light);
    font-weight: 600;
    min-width: 40px;
    text-align: right;
}

/* ── Toggle Switch ─────────────────────────────────────────────────────────── */

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
    cursor: pointer;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--bg-surface-raised);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-full);
    transition: background var(--transition-normal), border-color var(--transition-normal);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background: var(--text-secondary);
    border-radius: 50%;
    transition: transform var(--transition-normal), background var(--transition-normal);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--primary-dark);
    border-color: var(--primary);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(22px);
    background: var(--primary-light);
    box-shadow: 0 0 8px var(--primary-glow);
}

/* ── Settings Actions ──────────────────────────────────────────────────────── */

.settings-actions {
    text-align: center;
    padding: var(--space-lg) 0 var(--space-2xl);
}

/* ── Loading & Error States ────────────────────────────────────────────────── */

.settings-loading,
.settings-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    color: var(--text-secondary);
    gap: var(--space-md);
}

.settings-error .icon {
    font-size: 2rem;
}

/* ── Goals Page ────────────────────────────────────────────────────────────── */

.goals-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.goals-empty {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-secondary);
}

.goals-empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

/* ── Goal Card ─────────────────────────────────────────────────────────────── */

.goal-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.goal-card:hover {
    border-color: var(--border-medium);
    box-shadow: var(--shadow-md);
}

.goal-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-md);
}

.goal-type {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.goal-icon {
    font-size: 1.5rem;
}

.goal-type h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.goal-dates {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.goal-delete-btn {
    background: none;
    border: 1px solid transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.goal-delete-btn:hover {
    color: var(--poor);
    background: var(--poor-bg);
}

.goal-target {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.goal-target strong {
    color: var(--primary-light);
}

/* ── Goal Progress Bar ─────────────────────────────────────────────────────── */

.goal-progress-bar-container {
    width: 100%;
    height: 8px;
    background: var(--bg-surface-raised);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
    overflow: hidden;
}

.goal-progress-bar {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    transition: width 0.6s ease;
    min-width: 0;
}

/* ── Goal Stats ────────────────────────────────────────────────────────────── */

.goal-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-sm);
}

.goal-stat {
    text-align: center;
    padding: var(--space-sm);
    background: var(--bg-surface-raised);
    border-radius: var(--radius-sm);
}

.goal-stat-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.goal-stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ── Goals Create Section ──────────────────────────────────────────────────── */

.goals-create-section {
    max-width: 500px;
}

/* ── Spinner ───────────────────────────────────────────────────────────────── */

.spinner-sm {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid var(--text-dim);
    border-top-color: var(--primary-light);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ── Responsive ────────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }

    .settings-page,
    .goals-page {
        padding: var(--space-md);
    }

    .goal-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .setting-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    .setting-control {
        width: 100%;
    }

    .setting-input,
    .setting-select {
        width: 100%;
    }
}