/* Theme tokens — pair with inline head script + LearnKoreanInterop.setThemeDark */
:root {
    --lk-bg: #f6f7fb;
    --lk-surface: #ffffff;
    --lk-card: #ffffff;
    --lk-text: #121826;
    --lk-muted: #5b657a;
    --lk-border: #e3e6ef;
    --lk-primary: #1f5eff;
    --lk-primary-contrast: #ffffff;
    --lk-aside-top: #0d1b4c;
    --lk-aside-bottom: #311b54;
    --lk-shadow: 0 12px 40px rgba(0, 0, 40, 0.18);
    --lk-focus: 0 0 0 3px color-mix(in srgb, var(--lk-primary) 40%, transparent);
}

html.theme-dark {
    --lk-bg: #0c101b;
    --lk-surface: #0c101b;
    --lk-card: #121826;
    --lk-text: #eef2ff;
    --lk-muted: #aab4cc;
    --lk-border: #243047;
    --lk-primary: #6ea8ff;
    --lk-primary-contrast: #0b1020;
    --lk-aside-top: #050815;
    --lk-aside-bottom: #120724;
    --lk-shadow: 0 18px 55px rgba(0, 0, 0, 0.55);
}

html,
body {
    background: var(--lk-bg);
    color: var(--lk-text);
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
}

/* Cookie consent: hidden when user already accepted (see App.razor + learnKoreanInterop). */
html.lk-cookie-consent--accepted .lk-cookie-banner {
    display: none !important;
}

.lk-cookie-banner {
    position: fixed;
    inset-inline: 0;
    bottom: 0;
    z-index: 50;
    padding: 0.75rem 1rem max(0.75rem, env(safe-area-inset-bottom));
    pointer-events: none;
}

.lk-cookie-banner__inner {
    pointer-events: auto;
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.15rem;
    border-radius: 0.75rem 0.75rem 0 0;
    border: 1px solid var(--lk-border);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.12);
    background: var(--lk-card);
    color: var(--lk-text);
}

@media (min-width: 768px) {
    .lk-cookie-banner__inner {
        border-radius: 0.75rem;
        margin-bottom: 0.75rem;
    }

    .lk-cookie-banner {
        padding-bottom: 0.5rem;
    }
}

.lk-cookie-banner__title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 0.35rem;
}

.lk-cookie-banner__text {
    flex: 1 1 16rem;
    min-width: 0;
}

.lk-cookie-banner__actions {
    flex: 0 0 auto;
}

a {
    color: var(--lk-primary);
    text-decoration-thickness: 1px;
}

a:hover {
    color: color-mix(in srgb, var(--lk-primary) 80%, #000);
}

.muted {
    color: var(--lk-muted) !important;
}

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

.card-surface {
    background: var(--lk-card);
    border: 1px solid var(--lk-border);
    border-radius: 1rem;
    padding: 1rem 1.1rem;
    box-shadow: 0 8px 26px rgba(15, 23, 42, 0.06);
}

html.theme-dark .card-surface {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

/* Navigation tiles (main menu) */
.brand-block {
    padding: 0.25rem 0.35rem 0.75rem;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.brand-link:hover {
    color: #fff;
    text-decoration: underline;
}

.app-logo {
    font-size: 1.5rem;
}

.brand-text {
    font-size: 1.05rem;
}

.brand-tag {
    margin: 0.35rem 0 0;
    color: rgba(255, 255, 255, 0.72);
}

.nav-stack {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-top: 0.5rem;
}

.nav-tile {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.65rem 0.75rem;
    border-radius: 0.75rem;
    color: rgba(255, 255, 255, 0.88);
    text-decoration: none;
    border: 1px solid transparent;
}

.nav-tile:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.nav-tile.active {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.22);
    color: #fff;
}

.nav-tile__text {
    font-weight: 600;
}

/* Shell toolbar */
.shell-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    align-items: center;
    justify-content: flex-end;
    flex: 1;
    min-width: 0;
}

.shell-toolbar__cluster {
    display: inline-flex;
    gap: 0.35rem;
    align-items: center;
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 0.65rem;
    border: 1px solid var(--lk-border);
    background: var(--lk-card);
    color: var(--lk-text);
}

.icon-btn[aria-pressed="true"] {
    outline: 2px solid color-mix(in srgb, var(--lk-primary) 55%, transparent);
}

.lang-chip {
    width: auto;
    padding: 0 0.55rem;
    font-weight: 700;
    font-size: 0.8rem;
}

.search-mini {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex: 1 1 220px;
    min-width: 0;
    border: 1px solid var(--lk-border);
    background: var(--lk-card);
    border-radius: 999px;
    padding: 0.15rem 0.25rem 0.15rem 0.55rem;
}

.search-mini__input {
    border: 0;
    background: transparent;
    color: var(--lk-text);
    padding: 0.25rem 0.35rem;
    flex: 1;
    min-width: 0;
    outline: none;
}

/* Ads — keep slots visible but subtle */
.ad-banner {
    margin: 0.35rem 0;
}

.ad-banner__frame {
    border-radius: 0.75rem;
    border: 1px dashed color-mix(in srgb, var(--lk-muted) 40%, var(--lk-border));
    background: color-mix(in srgb, var(--lk-card) 92%, var(--lk-muted));
    min-height: 70px;
    min-width: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.ad-banner--header .ad-banner__frame {
    min-height: 90px;
    min-width: min(100%, 320px);
}

.ad-banner--sidebar .ad-banner__frame {
    min-height: 250px;
    min-width: 120px;
}

.lk-ads-header {
    min-height: 1px;
    width: 100%;
}

.ad-banner__placeholder {
    display: inline-flex;
    gap: 0.35rem;
    align-items: center;
    color: var(--lk-muted);
    padding: 0.35rem 0.5rem;
}

/* Home + lists */
.hero__icons {
    display: flex;
    gap: 0.75rem;
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
    color: var(--lk-primary);
}

.steps-list {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1.25rem;
}

.steps-list li {
    display: flex;
    gap: 0.45rem;
    align-items: center;
    margin: 0.35rem 0;
}

.level-grid {
    display: grid;
    gap: 0.65rem;
}

@media (min-width: 640px) {
    .level-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .level-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.level-card {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    color: inherit;
    transition: transform 120ms ease, box-shadow 120ms ease;
}

.level-card:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 34px rgba(15, 23, 42, 0.12);
    color: inherit;
}

.level-card__icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.75rem;
    display: grid;
    place-items: center;
    background: color-mix(in srgb, var(--lk-primary) 15%, transparent);
    color: var(--lk-primary);
}

.level-card__title {
    font-weight: 700;
}

.level-card__chev {
    margin-left: auto;
    color: var(--lk-muted);
}

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

.lesson-list__item {
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--lk-border);
}

.lesson-list__item:last-child {
    border-bottom: 0;
}

.lesson-list__link {
    display: flex;
    gap: 0.45rem;
    align-items: center;
    flex: 1;
    min-width: 0;
    font-weight: 600;
    text-decoration: none;
    color: inherit;
}

.lesson-list__link:hover {
    color: var(--lk-primary);
}

.lesson-list__row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
}

.lesson-list__cues {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-shrink: 0;
    margin-top: 0.05rem;
}

.lesson-list__unmark {
    padding: 0.1rem 0.35rem;
    line-height: 1;
}

.lesson-list__cue {
    display: inline-flex;
    font-size: 1.05rem;
    line-height: 1;
}

.lesson-list__cue--done {
    color: #0d9488;
}

.lesson-list__cue--fav {
    color: #ca8a04;
}

html.theme-dark .lesson-list__cue--fav {
    color: #fbbf24;
}

.lesson-list__item--done {
    background: color-mix(in srgb, #0d9488 6%, var(--lk-card));
}

.level-card__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0.5rem;
}

.level-card__progress-cues {
    display: inline-flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
}

.level-card__stat {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    font-weight: 600;
}

.level-card__stat--done {
    color: #0d9488;
}

.level-card__stat--fav {
    color: #ca8a04;
}

html.theme-dark .level-card__stat--fav {
    color: #fbbf24;
}

.lesson-view__title {
    font-weight: 750;
}

.lesson-view__body :is(h1, h2, h3) {
    margin-top: 1rem;
}

.lesson-figure img {
    max-width: 100%;
    border-radius: 0.75rem;
}

.phrase-grid {
    display: grid;
    gap: 0.55rem;
    margin: 0.75rem 0;
}

@media (min-width: 640px) {
    .phrase-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.phrase-grid > div {
    border: 1px solid var(--lk-border);
    border-radius: 0.75rem;
    padding: 0.55rem 0.65rem;
    background: color-mix(in srgb, var(--lk-card) 90%, var(--lk-muted));
}

.phrase-grid span {
    display: block;
    color: var(--lk-muted);
    font-size: 0.9rem;
}

.number-list li {
    margin: 0.25rem 0;
}

.callout {
    border-left: 4px solid var(--lk-primary);
    padding: 0.5rem 0.75rem;
    margin: 0.75rem 0;
    background: color-mix(in srgb, var(--lk-primary) 8%, transparent);
    border-radius: 0.5rem;
}

.lesson-actions__row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.lesson-actions__row--nav {
    justify-content: space-between;
}

.form-hint {
    margin: 0.35rem 0 0;
    font-size: 0.9rem;
    color: var(--lk-muted);
}

/* Exercises hub: tabs */
.exercises-tabs.card-surface {
    padding: 0;
    overflow: hidden;
}

.exercises-tabs__nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    border-bottom: 1px solid var(--lk-border);
    gap: 0.15rem;
}

.exercises-tabs__btn {
    white-space: nowrap;
}

.exercises-tabs__btn.active {
    font-weight: 650;
}

.exercises-tabs__panel {
    border-top: none;
}

/* Exercises hub: level subsections (legacy / deep links) */
.exercises-level-section__title {
    padding-bottom: 0.35rem;
    border-bottom: 1px solid var(--lk-border);
}

/* Exercise */
.exercise__q {
    border-top: 1px dashed var(--lk-border);
    padding-top: 0.85rem;
    margin-top: 0.85rem;
}

.exercise__q:first-of-type {
    border-top: 0;
    padding-top: 0;
    margin-top: 0;
}

.match-row {
    display: grid;
    grid-template-columns: 1fr minmax(9rem, 1.2fr);
    gap: 0.5rem;
    align-items: center;
    margin: 0.35rem 0;
}

.match-row__left {
    font-weight: 650;
}

.exercise__result {
    margin-top: 0.75rem;
    font-weight: 650;
}

.exercise__segment-done {
    border: 1px solid color-mix(in srgb, var(--lk-primary) 35%, var(--lk-border));
    background: color-mix(in srgb, var(--lk-primary) 6%, var(--lk-card));
    border-radius: 0.75rem;
    padding: 0.65rem 0.85rem;
}

.exercise__checkpoint {
    padding-top: 0.25rem;
}

/* Progress dashboard */
.progress-bar-lk {
    height: 0.55rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--lk-muted) 25%, var(--lk-border));
    overflow: hidden;
    margin: 0.5rem 0;
}

.progress-bar-lk__fill {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--lk-primary), #22d3ee);
}

.progress-bar-lk--practice {
    opacity: 0.95;
}

.progress-bar-lk__fill--practice {
    background: linear-gradient(90deg, #0d9488, #34d399);
}

.progress-level__title {
    display: flex;
    gap: 0.35rem;
    align-items: center;
}

.progress-level + .progress-level {
    margin-top: 0.65rem;
}

.btn-primary {
    background-color: var(--lk-primary);
    border-color: color-mix(in srgb, var(--lk-primary) 84%, #000);
    color: var(--lk-primary-contrast);
}

.btn-primary:hover {
    filter: brightness(0.96);
    color: var(--lk-primary-contrast);
}

.btn-outline-primary {
    color: var(--lk-primary);
    border-color: color-mix(in srgb, var(--lk-primary) 55%, var(--lk-border));
}

.btn-link {
    color: var(--lk-primary);
}

.form-check-input:focus,
.btn:focus,
.icon-btn:focus,
.search-mini__input:focus,
.form-select:focus {
    box-shadow: var(--lk-focus);
}

/* SEO prose blocks + K-pop grid */
.seo-prose :is(p, ul, ol, li) {
    max-width: 70ch;
}

.seo-prose img {
    max-width: 100%;
    height: auto;
    border-radius: 0.75rem;
}

.kpop-grid {
    display: grid;
    gap: 0.75rem;
}

@media (min-width: 640px) {
    .kpop-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1100px) {
    .kpop-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.kpop-card {
    position: relative;
    padding-top: 1.75rem;
}

.kpop-card__figure {
    margin: 0 0 0.85rem 0;
}

.kpop-card__media {
    border-radius: 0.65rem;
    overflow: hidden;
    background: color-mix(in srgb, var(--lk-muted) 12%, transparent);
}

.kpop-card__media img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    vertical-align: middle;
}

.kpop-card__credit .kpop-image-credit,
.kpop-image-credit-figure .kpop-image-credit {
    margin-bottom: 0;
}

.kpop-card__credit {
    margin-top: 0.35rem;
    line-height: 1.35;
}

.kpop-card__credit a,
.kpop-image-credit-figure a {
    word-break: break-word;
}

.lesson-figure figcaption.kpop-image-credit-figure {
    font-size: 0.85rem;
}

.kpop-card__rank {
    position: absolute;
    top: 0.6rem;
    right: 0.75rem;
    font-weight: 800;
    color: var(--lk-muted);
    font-size: 0.85rem;
}

.lesson-practice__table th,
.lesson-practice__table td {
    vertical-align: top;
}

.lesson-practice__table td[lang="ko"] {
    font-size: 1.02rem;
    line-height: 1.45;
}

.kpop-timeline li:last-child {
    border-bottom: none !important;
    padding-bottom: 0 !important;
    margin-bottom: 0 !important;
}