/* styles/ui.css — Reusable UI components for vlist.dev

   Card, split layout, sections, form controls, buttons, control buttons,
   segmented toggles, detail cards, stats bar, controls bar, chips,
   badges, source viewer, switch, slider, icons.

   Loaded on pages that use interactive UI components.
   Uses tokens.css design tokens for theming. */

/* ============================================================================
   Card — surface container with bg, border, radius
   ============================================================================ */

.ui-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all 0.2s ease;
}

/* -- Interactive: hoverable link / button cards ----------------------------- */

.ui-card--interactive {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.ui-card--interactive:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

/* -- Radius variants -------------------------------------------------------- */

.ui-card--sm {
    border-radius: var(--radius-sm);
}
.ui-card--xs {
    border-radius: var(--radius-xs);
}
.ui-card--lg {
    border-radius: 12px;
}
.ui-card--xl {
    border-radius: 16px;
}

/* -- Padding variants ------------------------------------------------------- */

.ui-card--flush {
    padding: 0;
}
.ui-card--compact {
    padding: 14px 18px;
}

/* -- Border emphasis -------------------------------------------------------- */

.ui-card--strong {
    border-width: 2px;
}

/* ============================================================================
   Split Layout — list + side panel
   ============================================================================ */

.split-layout {
    display: flex;
    gap: 16px;
    align-items: stretch;
}

.split-main {
    flex: 1;
    min-width: 0;
    background-color: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px;
}

.split-main--full {
    padding: 0;
}

/* ============================================================================
   Side Panel
   ============================================================================ */

.split-panel {
    width: 320px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow-x: hidden;
    overflow-y: auto;
}

/* ============================================================================
   Sections
   ============================================================================ */

.ui-section {
    padding: 14px 16px;
}

.ui-section + .ui-section {
    border-top: 1px solid var(--border);
}

.ui-section--hidden {
    display: none;
}

.ui-title {
    font-size: var(--fs-2xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-dim);
    margin: 0 0 8px;
}

.ui-title__hint {
    font-size: var(--fs-2xs);
    font-weight: 400;
    color: var(--text-muted);
    opacity: 0.7;
    margin-left: 6px;
}

/* ============================================================================
   Rows
   ============================================================================ */

.ui-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    min-height: 28px;
}

.ui-row.slider,
.ui-row.no-margin {
    margin-top: 0 !important;
}

.ui-row + .ui-row {
    margin-top: 8px;
}

.ui-row--action {
    padding-top: 4px;
}

.ui-label {
    flex: 1;
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

.ui-label--muted {
    color: var(--text-muted);
    font-style: italic;
    font-size: var(--fs-xs);
}

.ui-value {
    font-size: var(--fs-xs);
    color: var(--text);
    font-variant-numeric: tabular-nums;
    text-align: right;
    font-family: var(--font-mono);
}

/* ============================================================================
   Text — paragraph text inside panels (previously undefined in CSS)
   ============================================================================ */

.ui-text {
    font-size: var(--fs-sm);
    line-height: 1.6;
    color: var(--text-muted);
    margin: 0 0 8px;
}

.ui-text:last-child {
    margin-bottom: 0;
}

/* ============================================================================
   Inputs
   ============================================================================ */

.ui-input-group {
    display: flex;
    gap: 4px;
    flex: 1;
    min-width: 0;
}

.ui-input {
    width: 64px;
    padding: 5px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: var(--fs-sm);
    font-variant-numeric: tabular-nums;
    background: var(--bg);
    color: var(--text);
    outline: none;
    transition: border-color 0.15s;
    -moz-appearance: textfield;
}

.ui-input::-webkit-inner-spin-button,
.ui-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.ui-input:focus {
    border-color: var(--accent);
}

.ui-select {
    padding: 5px 24px 5px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: var(--fs-sm);
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='%236b7280'%3E%3Cpath d='M7.41 8.59L12 13.17l4.59-4.58L18 10l-6 6-6-6 1.41-1.41z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
}

.ui-select:focus {
    border-color: var(--accent);
}

.ui-select--full {
    flex: 1;
}

/* ============================================================================
   Buttons
   ============================================================================ */

.ui-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    font-size: var(--fs-xs);
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition:
        background 0.15s ease,
        border-color 0.15s ease;
}

.ui-btn svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.ui-btn:hover svg {
    opacity: 1;
}

.ui-btn--icon {
    padding: 5px 7px;
}

.ui-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.ui-btn:active {
    background: var(--border);
}

.ui-btn--active {
    background: var(--bg-card-hover);
    color: var(--text);
    font-weight: 600;
}

.ui-btn--primary {
    width: 100%;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    justify-content: center;
    transition: all 0.15s ease;
}

.ui-btn--primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.ui-btn--primary:active {
    transform: translateY(0);
    box-shadow: none;
}

.ui-btn--load:hover:not(:disabled) {
    filter: brightness(1.1);
}

.ui-btn--load:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.ui-btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.ui-btn-group--fill {
    display: flex;
    width: 100%;
}

.ui-btn-group--fill .ui-btn {
    flex: 1;
}

/* ============================================================================
   Control Buttons — discrete-value pickers (gap, radius, columns)
   ============================================================================ */

.ui-ctrl-btn {
    padding: 4px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-card);
    color: var(--text-muted);
    font-size: var(--fs-sm);
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s ease;
    min-width: 36px;
    text-align: center;
}

.ui-ctrl-btn:hover {
    border-color: var(--accent);
    color: var(--accent-text);
}

.ui-ctrl-btn--active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* ============================================================================
   Segmented Buttons — toggle group (e.g. selection mode)
   ============================================================================ */

.ui-segmented {
    display: flex;
    border-radius: var(--radius);
    background: var(--bg);
    overflow: hidden;
    padding: 2px;
    flex: 1;
    gap: 3px;
}

.ui-segmented__btn {
    flex: 1;
    padding: 5px 10px;
    border: none;
    background: var(--bg);
    color: var(--text-muted);
    font-size: var(--fs-xs);
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    border-radius: 4px;
    transition:
        background 0.15s ease,
        color 0.15s ease;
}

.ui-segmented__btn:last-child {
    border-right: none;
}

.ui-segmented__btn:hover {
    background: var(--accent);
    color: white;
}

.ui-segmented__btn--active {
    background: var(--accent);
    color: white;
}

.ui-segmented__btn--disabled,
.ui-segmented__btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

/* ============================================================================
   Detail — item preview card inside panel
   ============================================================================ */

.ui-detail {
    font-size: var(--fs-sm);
    line-height: 1.5;
    color: var(--text);
}

.ui-detail__empty {
    color: var(--text-dim);
    font-style: italic;
    font-size: var(--fs-sm);
}

.ui-detail__header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.ui-detail__name {
    font-weight: 600;
    font-size: var(--fs-ui);
}

.ui-detail__meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: var(--fs-xs);
    color: var(--text-muted);
    font-family: var(--font-mono);
    padding-top: 6px;
    border-top: 1px solid var(--border);
}

.ui-detail__avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    font-weight: 600;
    font-size: var(--fs-ui);
    flex-shrink: 0;
}

.ui-detail__email {
    font-size: var(--fs-xs);
    color: var(--text-muted);
}

/* ============================================================================
   Stats Bar
   ============================================================================ */

.stats {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 12px 20px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: var(--fs-ui);
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

/* ============================================================================
   Controls Bar
   ============================================================================ */

.controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.controls label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--fs-ui);
    font-weight: 500;
    color: var(--text-muted);
}

.controls select {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: var(--fs-ui);
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s;
}

.controls select:focus {
    border-color: var(--accent);
}

.controls button {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    color: var(--text);
    font-size: var(--fs-ui);
    font-weight: 500;
    cursor: pointer;
    transition:
        background 0.15s ease,
        border-color 0.15s ease;
}

.controls button:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.controls button:active {
    background: var(--border);
}

/* ============================================================================
   Chips — feature tag overlays
   ============================================================================ */

.ui-chips {
    position: absolute;
    top: 10px;
    right: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    z-index: 5;
}

.ui-chip {
    display: inline-block;
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    line-height: 1;
    padding: 4px 10px;
    border-radius: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-muted);
    white-space: nowrap;
}

/* ============================================================================
   Badge — small inline status / metadata labels
   ============================================================================ */

.ui-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: var(--fs-2xs);
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1.5;
    white-space: nowrap;
    flex-shrink: 0;
    color: var(--text-muted);
    background: var(--badge-bg);
}

/* -- Shape: pill ----------------------------------------------------------- */

.ui-badge--pill {
    border-radius: 20px;
    padding: 2px 10px;
}

/* -- Size: small ----------------------------------------------------------- */

.ui-badge--sm {
    font-size: 9px;
    padding: 2px 6px;
    border-radius: 3px;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

/* -- Variant: glass (translucent overlay for colored cards) ---------------- */

.ui-badge--glass {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(4px);
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 9px;
}

/* -- Semantic colors ------------------------------------------------------- */

.ui-badge--success {
    color: var(--badge-success);
    background: var(--badge-success-bg);
}

.ui-badge--warning {
    color: var(--badge-warning);
    background: var(--badge-warning-bg);
}

.ui-badge--error {
    color: var(--badge-error);
    background: var(--badge-error-bg);
}

.ui-badge--info {
    color: var(--badge-info);
    background: var(--badge-info-bg);
}

.ui-badge--muted {
    color: var(--badge-muted);
    background: var(--badge-muted-bg);
}

.ui-badge--purple {
    color: var(--badge-purple);
    background: var(--badge-purple-bg);
}

.ui-badge--accent {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    letter-spacing: 0.03em;
}

/* ============================================================================
   Source Code Viewer — Fixed bottom drawer
   ============================================================================ */

.source {
    position: sticky;
    bottom: 0;
    margin-top: auto;
    z-index: 100;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition:
        background-color 0.25s ease,
        border-color 0.25s ease;
}

.source__header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 16px;
    border-bottom: 1px solid var(--border);
    border-radius: 0 8px 0 0;
    background: var(--bg-card);
    flex-shrink: 0;
    height: 41px;
}

.source__title {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.source__tabs {
    display: flex;
    gap: 0;
    flex: 1;
}

.source__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: none;
    color: var(--text-dim);
    cursor: pointer;
    border-radius: 16px;
    flex-shrink: 0;
    margin-left: auto;
    transition:
        color 0.15s ease,
        background 0.15s ease,
        transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.source__toggle:hover {
    color: var(--text);
    background: var(--bg-card-hover);
}

.source--open .source__toggle {
    transform: rotate(180deg);
}

.source__tab {
    padding: 10px 16px;
    border: none;
    background: none;
    color: var(--text-dim);
    font-size: var(--fs-sm);
    font-weight: 500;
    font-family: var(--font-mono);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition:
        color 0.15s ease,
        border-color 0.15s ease;
}

.source__tab:hover {
    color: var(--text);
}

.source__tab--active {
    color: var(--accent-text, var(--text));
    border-bottom-color: var(--accent, currentColor);
}

.source__body {
    height: 0;
    overflow: hidden;
    min-height: 0;
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    transition: height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.source--open .source__body {
    height: var(--source-body-height, 60vh);
}

.source__panel {
    display: none;
    height: 100%;
}

.source__panel--active {
    display: block;
}

.source__panel pre {
    margin: 0;
    padding: 20px 24px;
    overflow: auto;
    overscroll-behavior: contain;
    height: 100%;
    font-size: var(--fs-sm);
    line-height: 1.65;
    background: transparent;
    box-sizing: border-box;
}

.source__panel code {
    font-family: var(--font-mono);
    tab-size: 2;
}

/* ============================================================================
   Switch — checkbox toggle (label > input + span)
   ============================================================================ */

.ui-switch {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.ui-switch input {
    display: none;
}

.ui-switch__track {
    position: relative;
    width: 36px;
    height: 20px;
    border-radius: 10px;
    background: var(--border);
    transition: background 0.2s ease;
    flex-shrink: 0;
}

.ui-switch input:checked + .ui-switch__track {
    background: var(--accent);
}

.ui-switch__track::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    transition: transform 0.2s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.ui-switch input:checked + .ui-switch__track::after {
    transform: translateX(16px);
}

/* ============================================================================
   Slider — styled range input for control panels
   ============================================================================ */

.ui-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: var(--border);
    outline: none;
    cursor: pointer;
}

.ui-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: transform 0.1s ease;
}

.ui-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.ui-slider::-webkit-slider-thumb:active {
    transform: scale(1.05);
}

.ui-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: transform 0.1s ease;
}

.ui-slider::-moz-range-thumb:hover {
    transform: scale(1.15);
}

.ui-slider::-moz-range-track {
    height: 4px;
    border-radius: 2px;
    background: var(--border);
}

/* ============================================================================
   Icons — mask-image on <i class="icon icon--name">
   Uses currentColor via background-color + CSS mask.
   SVG files live in /examples/icons/ — no inline SVG in the bundle.
   ============================================================================ */

.icon {
    display: inline-block;
    width: 14px;
    height: 14px;
    background-color: currentColor;
    -webkit-mask-size: contain;
    mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    vertical-align: -2px;
    flex-shrink: 0;
}

.icon--up {
    -webkit-mask-image: url("/examples/icons/up.svg");
    mask-image: url("/examples/icons/up.svg");
}

.icon--down {
    -webkit-mask-image: url("/examples/icons/down.svg");
    mask-image: url("/examples/icons/down.svg");
}

.icon--center {
    -webkit-mask-image: url("/examples/icons/center.svg");
    mask-image: url("/examples/icons/center.svg");
}

.icon--add {
    -webkit-mask-image: url("/examples/icons/add.svg");
    mask-image: url("/examples/icons/add.svg");
}

.icon--remove {
    -webkit-mask-image: url("/examples/icons/remove.svg");
    mask-image: url("/examples/icons/remove.svg");
}

.icon--trash {
    -webkit-mask-image: url("/examples/icons/trash.svg");
    mask-image: url("/examples/icons/trash.svg");
}

.icon--shuffle {
    -webkit-mask-image: url("/examples/icons/shuffle.svg");
    mask-image: url("/examples/icons/shuffle.svg");
}

.icon--back {
    -webkit-mask-image: url("/examples/icons/back.svg");
    mask-image: url("/examples/icons/back.svg");
}

.icon--forward {
    -webkit-mask-image: url("/examples/icons/forward.svg");
    mask-image: url("/examples/icons/forward.svg");
}

.icon--search {
    -webkit-mask-image: url("/examples/icons/search.svg");
    mask-image: url("/examples/icons/search.svg");
}

.icon--sort {
    -webkit-mask-image: url("/examples/icons/sort.svg");
    mask-image: url("/examples/icons/sort.svg");
}

.icon--filter {
    -webkit-mask-image: url("/examples/icons/filter.svg");
    mask-image: url("/examples/icons/filter.svg");
}

.icon--send {
    -webkit-mask-image: url("/examples/icons/send.svg");
    mask-image: url("/examples/icons/send.svg");
}

.icon--settings {
    -webkit-mask-image: url("/examples/icons/settings.svg");
    mask-image: url("/examples/icons/settings.svg");
}

/* ============================================================================
   Dark Mode Overrides
   ============================================================================ */

[data-theme-mode="dark"] .ui-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='%239ca3af'%3E%3Cpath d='M7.41 8.59L12 13.17l4.59-4.58L18 10l-6 6-6-6 1.41-1.41z'/%3E%3C/svg%3E");
}

/* ============================================================================
   Theme Transitions — UI component subset
   ============================================================================ */

html[data-theme] .ui-card,
html[data-theme] .stats,
html[data-theme] .controls button,
html[data-theme] .controls select,
html[data-theme] .split-panel,
html[data-theme] .ui-btn,
html[data-theme] .ui-ctrl-btn,
html[data-theme] .ui-badge,
html[data-theme] .ui-input,
html[data-theme] .ui-select,
html[data-theme] .ui-segmented,
html[data-theme] .ui-segmented__btn,
html[data-theme] .source__header,
html[data-theme] .source__tab,
html[data-theme] .source__panel pre {
    transition:
        background-color 0.25s ease,
        color 0.25s ease,
        border-color 0.25s ease;
}

/* ============================================================================
   Responsive: mobile
   ============================================================================ */

@media (max-width: 720px) {
    .stats {
        gap: 16px;
        font-size: var(--fs-sm);
        padding: 10px 16px;
    }

    .controls {
        flex-direction: column;
    }

    .source__header {
        gap: 12px;
        padding: 0 12px;
    }

    .source__tab {
        padding: 8px 12px;
        font-size: var(--fs-xs);
    }

    .source__panel pre {
        font-size: var(--fs-sm);
        padding: 16px;
    }
}

/* ============================================================================
   Responsive: split layout stacking
   ============================================================================ */

@media (max-width: 820px) {
    .split-layout {
        flex-direction: column;
    }

    .split-panel {
        width: 100%;
    }
}