/* Light School brand tokens for offline artifacts.
   Use the ls- prefix outside the website to avoid collisions. */

:root,
[data-ls-theme="dark"],
html[data-theme="dark"],
html[data-courses-theme="dark"] {
    color-scheme: dark;

    --ls-canvas: oklch(0.115 0.018 315);
    --ls-ink: oklch(0.965 0.006 85);
    --ls-surface: oklch(0.155 0.018 315 / 0.92);
    --ls-surface-raised: oklch(0.19 0.02 315);
    --ls-ink-secondary: oklch(0.88 0.008 315);
    --ls-ink-muted: oklch(0.71 0.014 315);
    --ls-border: oklch(0.94 0.008 85 / 0.11);
    --ls-border-strong: oklch(0.94 0.008 85 / 0.22);
    --ls-primary: oklch(0.72 0.135 78);
    --ls-on-primary: oklch(0.14 0.02 315);
    --ls-accent: oklch(0.66 0.15 292);
    --ls-on-accent: oklch(0.97 0.006 85);
    --ls-success: oklch(0.69 0.14 145);
    --ls-warning: oklch(0.76 0.14 70);
    --ls-danger: oklch(0.64 0.17 18);
    --ls-info: oklch(0.72 0.12 215);
    --ls-action-primary: var(--ls-primary);
    --ls-action-green: var(--ls-success);
    --ls-action-pink: var(--ls-pink);
    --ls-code: oklch(0.085 0.018 305);
    --ls-code-ink: oklch(0.925 0.008 85);
    --ls-shadow-sm: 0 1px 2px oklch(0.06 0.01 315 / 0.28);
    --ls-shadow-md: 0 10px 32px oklch(0.06 0.01 315 / 0.32);
    --ls-shadow-lg: 0 24px 72px oklch(0.06 0.01 315 / 0.42);
}

[data-ls-theme="light"],
html[data-theme="light"],
html[data-courses-theme="light"] {
    color-scheme: light;

    --ls-canvas: oklch(0.97 0.007 285);
    --ls-ink: oklch(0.235 0.025 290);
    --ls-surface: oklch(0.995 0.003 285);
    --ls-surface-raised: oklch(0.982 0.005 285);
    --ls-ink-secondary: oklch(0.285 0.025 290);
    --ls-ink-muted: oklch(0.43 0.022 290);
    --ls-border: oklch(0.8 0.025 285 / 0.78);
    --ls-border-strong: oklch(0.68 0.04 285 / 0.82);
    --ls-primary: oklch(0.46 0.17 292);
    --ls-on-primary: oklch(0.985 0.004 285);
    --ls-accent: oklch(0.47 0.11 72);
    --ls-on-accent: oklch(0.985 0.004 285);
    --ls-success: oklch(0.43 0.105 145);
    --ls-warning: oklch(0.47 0.105 70);
    --ls-danger: oklch(0.48 0.17 24);
    --ls-info: oklch(0.46 0.095 225);
    --ls-action-primary: oklch(0.50 0.17 355);
    --ls-action-green: oklch(0.52 0.115 205);
    --ls-action-pink: oklch(0.50 0.17 355);
    --ls-code: oklch(0.94 0.018 285);
    --ls-code-ink: oklch(0.285 0.035 290);
    --ls-shadow-sm: 0 1px 2px oklch(0.28 0.03 290 / 0.07);
    --ls-shadow-md: 0 10px 32px oklch(0.28 0.03 290 / 0.09);
    --ls-shadow-lg: 0 24px 72px oklch(0.28 0.03 290 / 0.13);
}

:root {
    --ls-gold: #d4a037;
    --ls-gold-bright: #e8c476;
    --ls-gold-deep: #b8862e;
    --ls-violet: #a78bfa;
    --ls-pink: #e06b8a;
    --ls-cyan: #00bcd4;
    --ls-green: #4caf50;
    --ls-amber: #ff9800;
    --ls-night: #050208;

    --ls-font-sans: "Gilroy", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --ls-font-mono: "Monaco", "Menlo", "Ubuntu Mono", "Courier New", monospace;

    --ls-type-display: clamp(3.25rem, 7vw, 6.5rem);
    --ls-type-h1: clamp(2.5rem, 5vw, 4.5rem);
    --ls-type-h2: clamp(1.85rem, 3vw, 3rem);
    --ls-type-h3: 1.35rem;
    --ls-type-body-lg: 1.2rem;
    --ls-type-body: 1rem;
    --ls-type-small: 0.875rem;
    --ls-type-label: 0.75rem;

    --ls-space-1: 0.25rem;
    --ls-space-2: 0.5rem;
    --ls-space-3: 0.75rem;
    --ls-space-4: 1rem;
    --ls-space-5: 1.25rem;
    --ls-space-6: 1.5rem;
    --ls-space-8: 2rem;
    --ls-space-10: 2.5rem;
    --ls-space-12: 3rem;
    --ls-space-16: 4rem;
    --ls-space-20: 5rem;
    --ls-space-24: 6rem;

    --ls-radius-sm: 0.375rem;
    --ls-radius-md: 0.625rem;
    --ls-radius-lg: 0.75rem;
    --ls-radius-xl: 1rem;
    --ls-radius-pill: 999px;

    --ls-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ls-duration-fast: 150ms;
    --ls-duration-base: 240ms;
}

/*
 * Light School UI primitives
 *
 * A shadcn-compatible semantic layer for the site's static HTML architecture.
 * Tokens follow shadcn naming so React islands can use the same contract later.
 */

:root {
    color-scheme: dark;

    --background: var(--ls-canvas);
    --foreground: var(--ls-ink);
    --card: color-mix(in oklch, var(--ls-surface) 78%, transparent);
    --card-foreground: var(--ls-ink);
    --popover: var(--ls-surface-raised);
    --popover-foreground: var(--ls-ink);
    --primary: var(--ls-primary);
    --primary-foreground: var(--ls-on-primary);
    --secondary: oklch(0.22 0.018 315);
    --secondary-foreground: oklch(0.94 0.008 85);
    --muted: oklch(0.205 0.015 315);
    --muted-foreground: var(--ls-ink-muted);
    --accent: var(--ls-accent);
    --accent-foreground: var(--ls-on-accent);
    --destructive: var(--ls-danger);
    --destructive-foreground: var(--ls-on-accent);
    --success: var(--ls-success);
    --warning: var(--ls-warning);
    --info: var(--ls-info);
    --action-primary: var(--ls-action-primary);
    --action-green: var(--ls-action-green);
    --action-pink: var(--ls-action-pink);
    --action-foreground: var(--primary-foreground);
    --border: var(--ls-border);
    --input: var(--ls-border-strong);
    --ring: var(--ls-primary);

    --radius: 0.75rem;
    --radius-sm: calc(var(--radius) - 0.35rem);
    --radius-md: calc(var(--radius) - 0.15rem);
    --radius-lg: var(--radius);
    --radius-xl: calc(var(--radius) + 0.35rem);
    --radius-full: 999px;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    --shadow-sm: var(--ls-shadow-sm);
    --shadow-md: var(--ls-shadow-md);
    --shadow-lg: var(--ls-shadow-lg);
    --ease-out: var(--ls-ease-out);
    --duration-fast: var(--ls-duration-fast);
    --duration-base: var(--ls-duration-base);
}

html {
    color-scheme: dark;
}

:where(h1, h2, h3, h4, h5, h6) {
    scroll-margin-top: 5.5rem;
    text-wrap: balance;
}

:where(p, li, figcaption) {
    text-wrap: pretty;
}

:where(img, svg, video) {
    max-width: 100%;
}

:where(button, a, input, select, textarea, summary) {
    touch-action: manipulation;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Accessible defaults shared by every route. */
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
    outline: 2px solid var(--ring);
    outline-offset: 3px;
}

:where(button, input, select, textarea) {
    font: inherit;
}

:where(button, [role="button"], select, summary) {
    -webkit-tap-highlight-color: transparent;
}

:where(button, [role="button"]):not(:disabled) {
    cursor: pointer;
}

:where(button, input, select, textarea):disabled,
:where([aria-disabled="true"]) {
    cursor: not-allowed;
    opacity: 0.5;
}

/* Button */
.ui-button {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.65rem 1.1rem;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    background: var(--action-primary);
    color: var(--action-foreground);
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    transition: transform var(--duration-base) var(--ease-out), background-color var(--duration-fast), border-color var(--duration-fast), color var(--duration-fast), box-shadow var(--duration-fast);
}

.ui-button:hover:not(:disabled) {
    background: color-mix(in oklch, var(--action-primary) 86%, var(--foreground));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.ui-button[aria-busy="true"] {
    pointer-events: none;
}

.ui-button:active:not(:disabled) {
    transform: translateY(0);
}

.ui-button--green {
    background: var(--action-green);
    color: var(--action-foreground);
}

.ui-button--green:hover:not(:disabled) {
    background: color-mix(in oklch, var(--action-green) 86%, var(--foreground));
}

.ui-button--pink {
    background: var(--action-pink);
    color: var(--action-foreground);
}

.ui-button--pink:hover:not(:disabled) {
    background: color-mix(in oklch, var(--action-pink) 86%, var(--foreground));
}

.ui-button--secondary {
    border-color: var(--border);
    background: var(--secondary);
    color: var(--secondary-foreground);
}

.ui-button--secondary:hover:not(:disabled) { background: oklch(0.27 0.02 315); }

.ui-button--outline {
    border-color: var(--input);
    background: transparent;
    color: var(--foreground);
}

.ui-button--outline:hover:not(:disabled) { border-color: var(--ring); background: oklch(0.72 0.135 78 / 0.08); }

.ui-button--ghost {
    background: transparent;
    color: var(--muted-foreground);
}

.ui-button--ghost:hover:not(:disabled) {
    background: var(--muted);
    color: var(--foreground);
    box-shadow: none;
}

.ui-button--destructive {
    background: var(--destructive);
    color: var(--destructive-foreground);
}

.ui-button--destructive:hover:not(:disabled) { background: oklch(0.69 0.17 18); }

.ui-button--sm { min-height: 2.25rem; padding: 0.45rem 0.8rem; font-size: 0.875rem; }
.ui-button--lg { min-height: 3rem; padding: 0.8rem 1.5rem; }
.ui-button--icon { width: 2.75rem; padding: 0; }

/* Marketing CTAs keep the established high-recognition pill silhouette while
   product controls retain the quieter medium radius above. */
.ui-button--marketing {
    min-height: 3rem;
    padding-inline: 1.75rem;
    border-radius: var(--radius-full);
    font-size: 0.925rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

/* Consistent backwards navigation across public pages and the portal. */
.ui-back-link,
.back-to-campus,
.lesson-back-link,
.sidebar-back-link,
.post-detail-back,
.detail-back {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.65rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: color-mix(in oklch, var(--card) 88%, transparent);
    color: var(--secondary-foreground);
    box-shadow: var(--shadow-sm);
    font: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--duration-base) var(--ease-out), background-color var(--duration-fast), border-color var(--duration-fast), color var(--duration-fast), box-shadow var(--duration-fast);
}

:where(.ui-back-link, .back-to-campus, .lesson-back-link, .sidebar-back-link, .post-detail-back, .detail-back):hover {
    border-color: color-mix(in oklch, var(--primary) 46%, var(--border));
    background: color-mix(in oklch, var(--primary) 7%, var(--card));
    color: var(--foreground);
    box-shadow: var(--shadow-md);
    transform: translateX(-2px);
}

:where(.ui-back-link, .back-to-campus, .lesson-back-link, .sidebar-back-link, .post-detail-back, .detail-back):active {
    transform: translateX(0);
}

/* Inputs and form composition */
.ui-field {
    display: grid;
    gap: var(--space-2);
}

.ui-label {
    color: var(--foreground);
    font-size: 0.875rem;
    font-weight: 600;
}

.ui-input,
.ui-select,
.ui-textarea {
    width: 100%;
    min-height: 2.75rem;
    border: 1px solid var(--input);
    border-radius: var(--radius-md);
    background: oklch(0.94 0.008 85 / 0.045);
    color: var(--foreground);
    padding: 0.65rem 0.85rem;
    transition: border-color var(--duration-fast), box-shadow var(--duration-fast), background-color var(--duration-fast);
}

.ui-select {
    background-color: oklch(0.16 0.018 315);
    color: var(--foreground);
}

.ui-textarea { min-height: 7rem; resize: vertical; }

.ui-input::placeholder,
.ui-textarea::placeholder { color: var(--muted-foreground); }

.ui-input:focus,
.ui-select:focus,
.ui-textarea:focus {
    border-color: var(--ring);
    outline: none;
    box-shadow: 0 0 0 3px oklch(0.72 0.135 78 / 0.16);
}

.ui-input[aria-invalid="true"],
.ui-select[aria-invalid="true"],
.ui-textarea[aria-invalid="true"] {
    border-color: var(--destructive);
}

.ui-description { color: var(--muted-foreground); font-size: 0.875rem; line-height: 1.5; }
.ui-field-error { color: var(--destructive); font-size: 0.875rem; }

/* Checkbox, radio, and switch */
.ui-check {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    gap: var(--space-3);
    color: var(--foreground);
    cursor: pointer;
}

.ui-check :where(input[type="checkbox"], input[type="radio"]) {
    width: 1.125rem;
    height: 1.125rem;
    accent-color: var(--primary);
}

.ui-switch {
    position: relative;
    display: inline-flex;
    width: 2.75rem;
    height: 1.5rem;
    align-items: center;
    flex: 0 0 auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--muted);
    padding: 2px;
    transition: background-color var(--duration-fast), border-color var(--duration-fast);
}

.ui-switch::after {
    content: '';
    width: 1.1rem;
    height: 1.1rem;
    border-radius: 50%;
    background: var(--muted-foreground);
    transform: translateX(0);
    transition: transform var(--duration-base) var(--ease-out), background-color var(--duration-fast);
}

.ui-switch[aria-checked="true"] { border-color: var(--primary); background: var(--primary); }
.ui-switch[aria-checked="true"]::after { background: var(--primary-foreground); transform: translateX(1.15rem); }

/* Card */
.ui-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--card);
    color: var(--card-foreground);
    box-shadow: var(--shadow-sm);
}

.ui-card__header { display: grid; gap: var(--space-2); padding: var(--space-6); }
.ui-card__title { margin: 0; color: var(--foreground); font-size: 1.125rem; font-weight: 600; line-height: 1.3; }
.ui-card__description { margin: 0; color: var(--muted-foreground); line-height: 1.6; }
.ui-card__content { padding: 0 var(--space-6) var(--space-6); }
.ui-card__footer { display: flex; align-items: center; gap: var(--space-3); padding: 0 var(--space-6) var(--space-6); }

/* Clickable content card with the Light School orbital icon treatment. */
.ui-icon-card {
    --ui-icon-accent: var(--info);
    display: block;
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--card);
    color: var(--card-foreground);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    transition: transform var(--duration-base) var(--ease-out), background-color var(--duration-fast), border-color var(--duration-fast), box-shadow var(--duration-fast);
}

.ui-icon-card:hover {
    border-color: color-mix(in oklch, var(--ui-icon-accent) 52%, var(--border));
    background: color-mix(in oklch, var(--ui-icon-accent) 4%, var(--card));
    box-shadow: var(--shadow-md), 0 0 0 1px color-mix(in oklch, var(--ui-icon-accent) 9%, transparent);
    transform: translateY(-3px);
}

.ui-icon-card__media {
    position: relative;
    isolation: isolate;
    display: grid;
    /* A definite width stops min-height from widening the strip through the
       aspect ratio, which pushed the medallion off centre in narrow cards. */
    width: 100%;
    min-width: 0;
    min-height: 10.625rem;
    aspect-ratio: 16 / 6;
    place-items: center;
    overflow: hidden;
    border-bottom: 1px solid color-mix(in oklch, var(--foreground) 10%, transparent);
    background:
        radial-gradient(circle at center, color-mix(in oklch, var(--ui-icon-accent) 14%, transparent) 0%, color-mix(in oklch, var(--ui-icon-accent) 6%, transparent) 23%, transparent 48%),
        repeating-radial-gradient(circle at center,
            transparent 0 3.375rem,
            color-mix(in oklch, var(--foreground) 5%, transparent) 3.4375rem 3.5rem,
            transparent 3.5625rem 5.5rem),
        linear-gradient(180deg, color-mix(in oklch, var(--secondary) 45%, var(--card)), var(--card));
}

.ui-icon-card__media::before,
.ui-icon-card__media::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: var(--radius-full);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.ui-icon-card__media::before {
    width: 9.25rem;
    height: 9.25rem;
    border: 1px solid color-mix(in oklch, var(--ui-icon-accent) 18%, transparent);
}

.ui-icon-card__media::after {
    z-index: 0;
    width: 4.75rem;
    height: 4.75rem;
    border: 1px solid color-mix(in oklch, var(--foreground) 14%, transparent);
    background: color-mix(in oklch, var(--card) 92%, transparent);
    box-shadow: var(--shadow-md);
}

.ui-icon-card__media img {
    position: relative;
    z-index: 1;
    width: 2.75rem;
    height: 2.75rem;
    object-fit: contain;
    filter: brightness(0) invert(1) opacity(0.72);
    transition: filter var(--duration-fast), opacity var(--duration-fast), transform var(--duration-base) var(--ease-out);
}

:where(html[data-theme="light"], html[data-ls-theme="light"]) .ui-icon-card__media img {
    filter: brightness(0) opacity(0.72);
}

.ui-icon-card:hover .ui-icon-card__media::before {
    border-color: color-mix(in oklch, var(--ui-icon-accent) 34%, transparent);
}

.ui-icon-card:hover .ui-icon-card__media img {
    opacity: 0.92;
    transform: scale(1.05);
}

.ui-icon-card__body {
    display: grid;
    gap: var(--space-3);
    padding: var(--space-6);
}

.ui-icon-card__title {
    margin: 0;
    color: var(--foreground);
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.3;
}

.ui-icon-card__description {
    margin: 0;
    color: var(--muted-foreground);
    line-height: 1.6;
}

/* Article navigation */
.post-nav {
    width: 100%;
    max-width: 56.25rem;
    margin: var(--space-20) auto 0;
    padding-top: var(--space-12);
    border-top: 1px solid var(--border);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
}

.post-content .post-nav-item,
.post-content .post-nav-item:hover,
.post-nav-item {
    min-width: 0;
    min-height: 8.5rem;
    display: grid;
    grid-template-columns: 3rem minmax(0, 1fr);
    grid-template-rows: auto auto;
    grid-template-areas:
        "icon label"
        "icon title";
    align-content: center;
    align-items: start;
    column-gap: var(--space-4);
    padding: var(--space-6);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--card);
    color: var(--card-foreground);
    box-shadow: var(--shadow-sm);
    text-align: left;
    text-decoration: none !important;
    transition: transform var(--duration-base) var(--ease-out), background-color var(--duration-fast), border-color var(--duration-fast), box-shadow var(--duration-fast);
}

.post-nav-item.next {
    grid-template-columns: minmax(0, 1fr) 3rem;
    grid-template-areas:
        "label icon"
        "title icon";
    text-align: right;
}

.post-nav-item::before {
    content: "";
    grid-area: icon;
    align-self: center;
    width: 3rem;
    height: 3rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--secondary);
    transition: background-color var(--duration-fast), border-color var(--duration-fast), transform var(--duration-base) var(--ease-out);
}

.post-nav-item:hover {
    border-color: color-mix(in oklch, var(--primary) 42%, var(--border));
    background: color-mix(in oklch, var(--primary) 5%, var(--card));
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.post-nav-item .post-nav-icon,
.post-content .post-nav-item .post-nav-icon {
    grid-area: icon;
    z-index: 1;
    align-self: center;
    width: 3rem !important;
    height: 3rem !important;
    max-width: 3rem;
    max-height: 3rem;
    margin: 0;
    padding: 0.72rem;
    filter: brightness(0) invert(1);
    object-fit: contain;
    opacity: 0.72;
    transition: filter var(--duration-fast), opacity var(--duration-fast), transform var(--duration-base) var(--ease-out);
}

.post-nav-item:hover::before {
    border-color: var(--primary);
    background: var(--primary);
    transform: scale(1.04);
}

.post-nav-item:hover .post-nav-icon {
    filter: brightness(0);
    opacity: 1;
    transform: scale(1.04);
}

.post-nav-item .label,
.post-content .post-nav-item .label {
    grid-area: label;
    position: static;
    display: block;
    margin: 0 0 var(--space-2);
    color: var(--muted-foreground);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    line-height: 1.2;
    text-transform: uppercase;
    transition: color var(--duration-fast);
}

.post-nav-item .title,
.post-content .post-nav-item .title {
    grid-area: title;
    display: block;
    margin: 0;
    color: var(--foreground);
    font-size: clamp(1.05rem, 1.6vw, 1.3rem);
    font-weight: 600;
    letter-spacing: -0.015em;
    line-height: 1.25;
    transition: color var(--duration-fast);
}

.post-nav-item.next :where(.label, .title) {
    justify-self: end;
}

.post-nav-item:hover .label {
    color: var(--primary);
}

@media (max-width: 768px) {
    .post-nav {
        grid-template-columns: 1fr;
        gap: var(--space-3);
        margin-top: var(--space-16);
        padding-top: var(--space-8);
    }

    .post-content .post-nav-item,
    .post-content .post-nav-item:hover,
    .post-nav-item {
        min-height: 7.5rem;
        padding: var(--space-5);
    }
}

/* Badge */
.ui-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    width: fit-content;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--secondary);
    color: var(--secondary-foreground);
    padding: 0.2rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    line-height: 1.4;
}

.ui-badge--success { border-color: oklch(0.69 0.14 145 / 0.35); background: oklch(0.69 0.14 145 / 0.12); color: var(--success); }
.ui-badge--warning { border-color: oklch(0.76 0.14 70 / 0.35); background: oklch(0.76 0.14 70 / 0.12); color: var(--warning); }
.ui-badge--destructive { border-color: oklch(0.64 0.17 18 / 0.35); background: oklch(0.64 0.17 18 / 0.12); color: var(--destructive); }

/* Alert */
.ui-alert {
    display: grid;
    gap: var(--space-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--card);
    padding: var(--space-4);
}

.ui-alert__title { color: var(--foreground); font-weight: 600; }
.ui-alert__description { color: var(--muted-foreground); font-size: 0.925rem; line-height: 1.55; }
.ui-alert--destructive { border-color: oklch(0.64 0.17 18 / 0.35); background: oklch(0.64 0.17 18 / 0.08); }
.ui-alert--success { border-color: oklch(0.69 0.14 145 / 0.35); background: oklch(0.69 0.14 145 / 0.08); }

/* Table */
.ui-table-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-lg); }
.ui-table { width: 100%; border-collapse: collapse; font-size: 0.925rem; }
.ui-table th { color: var(--muted-foreground); font-weight: 600; text-align: left; }
.ui-table :where(th, td) { padding: 0.8rem 1rem; border-bottom: 1px solid var(--border); }
.ui-table tbody tr:last-child td { border-bottom: 0; }
.ui-table tbody tr:hover { background: oklch(0.94 0.008 85 / 0.035); }
.ui-table :where(td, th) { font-variant-numeric: tabular-nums; }

/* Tabs */
.ui-tabs__list {
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-1);
    border-radius: var(--radius-md);
    background: var(--muted);
    padding: var(--space-1);
}

.ui-tabs__trigger {
    min-height: 2.25rem;
    border: 0;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--muted-foreground);
    padding: 0.45rem 0.8rem;
}

.ui-tabs__trigger[aria-selected="true"] { background: var(--background); color: var(--foreground); box-shadow: var(--shadow-sm); }

/* Progress */
.ui-progress {
    width: 100%;
    height: 0.5rem;
    overflow: hidden;
    border-radius: var(--radius-full);
    background: var(--muted);
}

.ui-progress__bar {
    height: 100%;
    border-radius: inherit;
    background: var(--primary);
    transform-origin: left center;
    transition: transform var(--duration-base) var(--ease-out);
}

/* Accordion */
.ui-accordion { border-top: 1px solid var(--border); }
.ui-accordion details { border-bottom: 1px solid var(--border); }
.ui-accordion summary { display: flex; min-height: 3.5rem; align-items: center; justify-content: space-between; gap: var(--space-4); color: var(--foreground); font-weight: 600; list-style: none; }
.ui-accordion summary::-webkit-details-marker { display: none; }
.ui-accordion details > :not(summary) { padding: 0 0 var(--space-5); color: var(--muted-foreground); }

/* Dialog / popover surfaces */
.ui-dialog::backdrop { background: oklch(0.06 0.01 315 / 0.78); }
.ui-dialog {
    width: min(32rem, calc(100vw - 2rem));
    max-height: min(42rem, calc(100dvh - 2rem));
    overflow-y: auto;
    overscroll-behavior: contain;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--popover);
    color: var(--popover-foreground);
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
}

.ui-sheet {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 1000;
    width: min(24rem, calc(100vw - 2rem));
    overflow-y: auto;
    overscroll-behavior: contain;
    border-left: 1px solid var(--border);
    background: var(--popover);
    color: var(--popover-foreground);
    padding: max(var(--space-6), env(safe-area-inset-top)) max(var(--space-6), env(safe-area-inset-right)) max(var(--space-6), env(safe-area-inset-bottom)) var(--space-6);
    box-shadow: var(--shadow-lg);
}

.ui-sheet::backdrop { background: oklch(0.06 0.01 315 / 0.78); }

.ui-popover,
.ui-dropdown {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--popover);
    color: var(--popover-foreground);
    padding: var(--space-2);
    box-shadow: var(--shadow-lg);
}

/* Utility primitives used across composed components. */
.ui-separator { width: 100%; height: 1px; border: 0; background: var(--border); }
.ui-skeleton { border-radius: var(--radius-sm); background: var(--muted); animation: ui-pulse 1.8s ease-in-out infinite; }
.ui-avatar { display: inline-grid; width: 2.5rem; aspect-ratio: 1; place-items: center; overflow: hidden; border-radius: 50%; background: var(--muted); color: var(--muted-foreground); }
.ui-avatar img { width: 100%; height: 100%; object-fit: cover; }
.ui-kbd { border: 1px solid var(--border); border-bottom-width: 2px; border-radius: var(--radius-sm); background: var(--muted); color: var(--muted-foreground); padding: 0.08rem 0.4rem; font: 0.78rem/1.5 Monaco, Menlo, monospace; }

.ui-breadcrumb,
.ui-pagination {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--muted-foreground);
    font-size: 0.875rem;
}

.ui-breadcrumb a,
.ui-pagination a {
    color: inherit;
    text-decoration: none;
}

.ui-breadcrumb a:hover,
.ui-pagination a:hover { color: var(--foreground); }

.ui-pagination a {
    display: inline-flex;
    min-width: 2.5rem;
    min-height: 2.5rem;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
}

.ui-pagination a[aria-current="page"] { border-color: var(--border); background: var(--muted); color: var(--foreground); }

.ui-toast {
    width: min(24rem, calc(100vw - 2rem));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--popover);
    color: var(--popover-foreground);
    padding: var(--space-4);
    box-shadow: var(--shadow-lg);
}

.ui-empty {
    display: grid;
    min-height: 12rem;
    place-items: center;
    gap: var(--space-3);
    color: var(--muted-foreground);
    text-align: center;
}

.ui-spinner {
    width: 1.1rem;
    height: 1.1rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: ui-spin 700ms linear infinite;
}

@keyframes ui-pulse { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } }
@keyframes ui-spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (forced-colors: active) {
    :where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
        outline-color: Highlight;
    }
}