/*
 * SteepUI Atomic Learning Components
 * Shared course, quiz, flashcard, game, leaderboard, and mastery UI.
 */

@layer components {
  .steep-ui-theme-default {
    --steep-ui-surface: var(--color-canvas);
    --steep-ui-border: color-mix(in srgb, var(--color-ink-light) 70%, transparent);
    --steep-ui-text: var(--color-ink);
    --steep-ui-muted: var(--color-ink-dark);
    --steep-ui-accent: var(--color-link);
    --steep-ui-accent-soft: color-mix(in srgb, var(--color-link) 14%, var(--color-canvas));
    --steep-ui-track: color-mix(in srgb, var(--color-ink-light) 55%, transparent);
  }

  .steep-ui-theme-star-map {
    --steep-ui-surface: oklch(21% 0.04 264);
    --steep-ui-border: color-mix(in srgb, oklch(84% 0.08 272) 55%, transparent);
    --steep-ui-text: oklch(95% 0.01 260);
    --steep-ui-muted: oklch(80% 0.03 265);
    --steep-ui-accent: oklch(84% 0.11 245);
    --steep-ui-accent-soft: color-mix(in srgb, oklch(84% 0.11 245) 20%, oklch(21% 0.04 264));
    --steep-ui-track: color-mix(in srgb, oklch(95% 0.01 260) 20%, transparent);
  }

  .steep-ui-theme-minimalist {
    --steep-ui-surface: oklch(99% 0 0);
    --steep-ui-border: oklch(90% 0 0);
    --steep-ui-text: oklch(20% 0 0);
    --steep-ui-muted: oklch(48% 0 0);
    --steep-ui-accent: oklch(36% 0.03 250);
    --steep-ui-accent-soft: oklch(96% 0 0);
    --steep-ui-track: oklch(92% 0 0);
  }

  .steep-ui-card {
    background: var(--steep-ui-surface, var(--color-canvas));
    border: 1px solid var(--steep-ui-border, var(--color-ink-light));
    border-radius: 0.95rem;
    color: var(--steep-ui-text, var(--color-ink));
    box-shadow: var(--shadow-sm);
    padding: 1rem;
  }

  .steep-ui-btn {
    align-items: center;
    border-radius: 0.65rem;
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    font-size: 0.95rem;
    font-weight: 600;
    gap: 0.45rem;
    justify-content: center;
    line-height: 1.2;
    min-block-size: 2.25rem;
    padding: 0.5rem 0.9rem;
    text-decoration: none;
    transition: transform var(--duration-fast) var(--ease-out-expo), background-color var(--duration-fast) var(--ease-out-expo);
  }

  .steep-ui-btn:hover {
    transform: translateY(-1px);
  }

  .steep-ui-btn--primary {
    background: var(--steep-ui-accent, var(--color-link));
    color: white;
  }

  .steep-ui-btn--secondary {
    background: var(--steep-ui-accent-soft, var(--color-canvas));
    border-color: var(--steep-ui-border, var(--color-ink-light));
    color: var(--steep-ui-text, var(--color-ink));
  }

  .steep-ui-flashcard__position {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.86rem;
    margin: 0 0 0.5rem;
  }

  .steep-ui-flashcard__scene {
    perspective: 1000px;
  }

  .steep-ui-flashcard__inner {
    cursor: pointer;
    position: relative;
    transition: transform 0.5s var(--ease-out-expo, ease);
    transform-style: preserve-3d;
  }

  .steep-ui-flashcard__inner.is-flipped {
    transform: rotateY(180deg);
  }

  .steep-ui-flashcard__face {
    backface-visibility: hidden;
    background: color-mix(in srgb, var(--steep-ui-accent-soft, white) 55%, var(--steep-ui-surface, white));
    border-radius: 0.8rem;
    padding: 0.85rem;
  }

  .steep-ui-flashcard__front {
    position: relative;
  }

  .steep-ui-flashcard__back {
    inset: 0;
    position: absolute;
    transform: rotateY(180deg);
  }

  .steep-ui-flashcard__label {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.78rem;
    letter-spacing: 0.02em;
    margin: 0;
    text-transform: uppercase;
  }

  .steep-ui-flashcard__text {
    font-size: 1rem;
    line-height: 1.45;
    margin: 0.5rem 0 0;
  }

  .steep-ui-flashcard__hint {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.84rem;
    margin: 0.65rem 0 0;
  }

  .steep-ui-flashcard__actions {
    display: flex;
    gap: 0.65rem;
    margin-top: 0.85rem;
  }

  .steep-ui-quiz-node__fieldset {
    border: 0;
    margin: 0;
    padding: 0;
  }

  .steep-ui-quiz-node__prompt {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    margin: 0 0 0.85rem;
    padding: 0;
  }

  .steep-ui-quiz-node__number {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    margin-right: 0.45rem;
  }

  .steep-ui-quiz-node__options {
    display: grid;
    gap: 0.55rem;
  }

  .steep-ui-quiz-node__option {
    align-items: start;
    background: color-mix(in srgb, var(--steep-ui-accent-soft, white) 45%, var(--steep-ui-surface, white));
    border: 1px solid var(--steep-ui-border, var(--color-ink-light));
    border-radius: 0.7rem;
    cursor: pointer;
    display: grid;
    gap: 0.55rem;
    grid-template-columns: auto 1fr;
    padding: 0.65rem 0.75rem;
    transition: border-color 120ms ease, background-color 120ms ease, box-shadow 120ms ease;
  }

  .steep-ui-quiz-node__option:hover {
    border-color: color-mix(in srgb, var(--steep-ui-accent, var(--color-link)) 50%, var(--steep-ui-border, var(--color-ink-light)));
    background: color-mix(in srgb, var(--steep-ui-accent-soft, white) 65%, var(--steep-ui-surface, white));
  }

  .steep-ui-quiz-node__option:has(:checked) {
    border-color: var(--steep-ui-accent, var(--color-link));
    background: color-mix(in srgb, var(--steep-ui-accent, var(--color-link)) 12%, var(--steep-ui-surface, white));
    box-shadow: 0 0 0 1px var(--steep-ui-accent, var(--color-link));
  }

  .steep-ui-quiz-node__option:has(:focus-visible) {
    outline: 2px solid var(--steep-ui-accent, var(--color-link));
    outline-offset: 2px;
  }

  .steep-ui-quiz-node__radio {
    accent-color: var(--steep-ui-accent, var(--color-link));
    margin-top: 0.22rem;
  }

  .steep-ui-quiz-node__option-text {
    line-height: 1.35;
  }

  .steep-ui-quiz-node__textarea,
  .steep-ui-game-round__input {
    background: color-mix(in srgb, var(--steep-ui-accent-soft, white) 30%, var(--steep-ui-surface, white));
    border: 1px solid var(--steep-ui-border, var(--color-ink-light));
    border-radius: 0.7rem;
    color: var(--steep-ui-text, var(--color-ink));
    font: inherit;
    inline-size: 100%;
    line-height: 1.45;
    padding: 0.7rem 0.75rem;
    resize: vertical;
  }

  .steep-ui-quiz-node__feedback {
    border-radius: 0.65rem;
    font-size: 0.9rem;
    margin: 0.8rem 0 0;
    padding: 0.55rem 0.65rem;
  }

  .steep-ui-quiz-node__feedback--neutral {
    background: color-mix(in srgb, var(--steep-ui-track, #e5e7eb) 80%, transparent);
  }

  .steep-ui-quiz-node__feedback--success {
    background: color-mix(in srgb, oklch(70% 0.17 150) 24%, transparent);
  }

  .steep-ui-quiz-node__feedback--error {
    background: color-mix(in srgb, oklch(68% 0.2 20) 24%, transparent);
  }

  .steep-ui-game-round__header {
    align-items: start;
    display: flex;
    justify-content: space-between;
  }

  .steep-ui-game-round__title-wrap {
    display: grid;
    gap: 0.2rem;
  }

  .steep-ui-game-round__kicker {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.78rem;
    margin: 0;
    text-transform: uppercase;
  }

  .steep-ui-game-round__title {
    font-size: 1.1rem;
    margin: 0;
  }

  .steep-ui-game-round__status {
    background: color-mix(in srgb, var(--steep-ui-accent-soft, white) 60%, transparent);
    border-radius: 999px;
    font-size: 0.8rem;
    margin: 0;
    padding: 0.3rem 0.58rem;
    text-transform: capitalize;
  }

  .steep-ui-game-round__objective,
  .steep-ui-game-round__prompt,
  .steep-ui-game-round__hint {
    line-height: 1.45;
    margin: 0.75rem 0 0;
  }

  .steep-ui-game-round__hint {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.9rem;
  }

  .steep-ui-game-round__footer {
    display: grid;
    gap: 0.7rem;
    margin-top: 0.9rem;
  }

  .steep-ui-course-player__header {
    display: grid;
    gap: 0.45rem;
  }

  .steep-ui-course-player__subtitle {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.82rem;
    margin: 0;
    text-transform: uppercase;
  }

  .steep-ui-course-player__title {
    font-size: 1.35rem;
    margin: 0;
  }

  .steep-ui-course-player__module {
    display: grid;
    gap: 0.2rem;
  }

  .steep-ui-course-player__module-type {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.85rem;
    margin: 0;
    text-transform: capitalize;
  }

  .steep-ui-course-player__module-title {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0;
  }

  .steep-ui-course-player__step {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.88rem;
    margin: 0;
  }

  .steep-ui-course-player__progress {
    background: var(--steep-ui-track, #e5e7eb);
    border-radius: 999px;
    block-size: 0.6rem;
    margin-top: 0.9rem;
    overflow: hidden;
  }

  .steep-ui-course-player__progress-fill {
    background: var(--steep-ui-accent, var(--color-link));
    block-size: 100%;
    border-radius: 999px;
  }

  .steep-ui-course-player__body {
    margin-top: 1rem;
  }

  .steep-ui-leaderboard__header {
    align-items: baseline;
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
  }

  .steep-ui-leaderboard__title,
  .steep-ui-leaderboard__score-label {
    margin: 0;
  }

  .steep-ui-leaderboard__score-label {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.82rem;
    text-transform: uppercase;
  }

  .steep-ui-leaderboard__empty {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    margin: 0;
  }

  .steep-ui-leaderboard__list {
    display: grid;
    gap: 0.45rem;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .steep-ui-leaderboard__entry {
    align-items: center;
    border: 1px solid var(--steep-ui-border, var(--color-ink-light));
    border-radius: 0.7rem;
    display: grid;
    gap: 0.55rem;
    grid-template-columns: 2rem 1fr auto;
    padding: 0.55rem 0.65rem;
  }

  .steep-ui-leaderboard__entry.is-highlighted {
    background: color-mix(in srgb, var(--steep-ui-accent-soft, white) 75%, transparent);
    border-color: color-mix(in srgb, var(--steep-ui-accent, var(--color-link)) 40%, var(--steep-ui-border, #ddd));
  }

  .steep-ui-leaderboard__rank {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    text-align: center;
  }

  .steep-ui-leaderboard__identity {
    min-inline-size: 0;
  }

  .steep-ui-leaderboard__name {
    margin: 0;
  }

  .steep-ui-leaderboard__meta {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.85rem;
    margin: 0.12rem 0 0;
  }

  .steep-ui-leaderboard__score {
    font-variant-numeric: tabular-nums;
    font-weight: 700;
  }

  .steep-ui-mastery-meter__header {
    align-items: baseline;
    display: flex;
    justify-content: space-between;
  }

  .steep-ui-mastery-meter__label,
  .steep-ui-mastery-meter__value {
    margin: 0;
  }

  .steep-ui-mastery-meter__value {
    font-size: 1.25rem;
    font-variant-numeric: tabular-nums;
    font-weight: 700;
  }

  .steep-ui-mastery-meter__track {
    background: var(--steep-ui-track, #e5e7eb);
    border-radius: 999px;
    block-size: 0.75rem;
    margin-top: 0.75rem;
    overflow: hidden;
  }

  .steep-ui-mastery-meter__fill {
    block-size: 100%;
    border-radius: 999px;
  }

  .steep-ui-mastery-meter__fill.is-high {
    background: oklch(70% 0.17 150);
  }

  .steep-ui-mastery-meter__fill.is-medium {
    background: oklch(78% 0.15 85);
  }

  .steep-ui-mastery-meter__fill.is-low {
    background: oklch(68% 0.2 20);
  }

  .steep-ui-mastery-meter__detail {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    margin: 0.65rem 0 0;
  }

  /* Quiz Results */

  .steep-ui-quiz-results__header {
    display: grid;
    gap: 0.35rem;
    margin-block-end: 0.85rem;
  }

  .steep-ui-quiz-results__score {
    font-size: 1rem;
    font-variant-numeric: tabular-nums;
    margin: 0;
  }

  .steep-ui-quiz-results__verdict {
    border-radius: 0.55rem;
    display: inline-block;
    font-size: 0.88rem;
    font-weight: 600;
    margin: 0;
    padding: 0.3rem 0.6rem;
  }

  .steep-ui-quiz-results__verdict--pass {
    background: color-mix(in srgb, oklch(70% 0.17 150) 24%, transparent);
    color: oklch(38% 0.12 150);
  }

  .steep-ui-quiz-results__verdict--fail {
    background: color-mix(in srgb, oklch(68% 0.2 20) 24%, transparent);
    color: oklch(40% 0.14 20);
  }

  .steep-ui-quiz-results__items {
    display: grid;
    gap: 0.55rem;
  }

  .steep-ui-quiz-results__item {
    border-radius: 0.6rem;
    padding: 0.6rem 0.7rem;
  }

  .steep-ui-quiz-results__item--correct {
    background: color-mix(in srgb, oklch(70% 0.17 150) 10%, var(--steep-ui-surface, white));
    border-inline-start: 3px solid oklch(70% 0.17 150);
  }

  .steep-ui-quiz-results__item--incorrect {
    background: color-mix(in srgb, oklch(68% 0.2 20) 10%, var(--steep-ui-surface, white));
    border-inline-start: 3px solid oklch(68% 0.2 20);
  }

  .steep-ui-quiz-results__number {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    margin-inline-end: 0.3rem;
  }

  .steep-ui-quiz-results__question {
    font-weight: 600;
    margin: 0 0 0.25rem;
  }

  .steep-ui-quiz-results__answer {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
  }

  .steep-ui-quiz-results__footer {
    margin-block-start: 0.85rem;
  }

  /* Flashcard Deck */

  .steep-ui-flashcard-deck {
    display: grid;
    gap: 0.75rem;
  }

  .steep-ui-flashcard-deck__card {
    background: color-mix(in srgb, var(--steep-ui-accent-soft, white) 55%, var(--steep-ui-surface, white));
    border: 1px solid var(--steep-ui-border, var(--color-ink-light));
    border-radius: 0.85rem;
    padding: 0.85rem;
  }

  .steep-ui-flashcard-deck--compact {
    gap: 0.55rem;
  }

  .steep-ui-flashcard-deck--compact .steep-ui-flashcard-deck__card {
    border-radius: 0.7rem;
    padding: 0.65rem;
  }

  .steep-ui-flashcard-deck--compact .steep-ui-flashcard-deck__text {
    font-size: 0.92rem;
    line-height: 1.35;
  }

  .steep-ui-flashcard-deck--compact .steep-ui-flashcard-deck__hint,
  .steep-ui-flashcard-deck--compact .steep-ui-flashcard-deck__progress {
    font-size: 0.8rem;
  }

  .steep-ui-flashcard-deck--compact .steep-ui-flashcard-deck__actions {
    gap: 0.45rem;
    margin-block-start: 0.55rem;
  }

  .steep-ui-flashcard-deck__scene {
    perspective: 1000px;
  }

  .steep-ui-flashcard-deck__inner {
    cursor: pointer;
    position: relative;
    transition: transform 0.5s var(--ease-out-expo, ease);
    transform-style: preserve-3d;
  }

  .steep-ui-flashcard-deck__inner.is-flipped {
    transform: rotateY(180deg);
  }

  .steep-ui-flashcard-deck__face {
    backface-visibility: hidden;
  }

  .steep-ui-flashcard-deck__front {
    position: relative;
  }

  .steep-ui-flashcard-deck__back {
    inset: 0;
    position: absolute;
    transform: rotateY(180deg);
  }

  .steep-ui-flashcard-deck__text {
    font-size: 1rem;
    line-height: 1.45;
    margin: 0.3rem 0 0;
  }

  .steep-ui-flashcard-deck__hint {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.84rem;
    margin: 0.5rem 0 0;
  }

  .steep-ui-flashcard-deck__actions {
    display: flex;
    gap: 0.65rem;
    margin-block-start: 0.75rem;
  }

  .steep-ui-flashcard-deck__progress {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.88rem;
  }

  .steep-ui-flashcard-deck__progress p {
    margin: 0;
  }

  .steep-ui-flashcard-deck__empty {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    margin: 0;
  }

  /* Data Table */

  .steep-ui-data-table {
    overflow-x: auto;
  }

  .steep-ui-data-table__table {
    border-collapse: collapse;
    inline-size: 100%;
  }

  .steep-ui-data-table__caption {
    caption-side: top;
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.88rem;
    margin-block-end: 0.65rem;
    text-align: start;
  }

  .steep-ui-data-table__th {
    border-block-end: 1px solid var(--steep-ui-border, var(--color-ink-light));
    color: var(--steep-ui-muted, var(--color-ink-dark));
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 0.55rem 0.75rem;
    text-align: start;
    text-transform: uppercase;
    white-space: nowrap;
  }

  .steep-ui-data-table__td {
    border-block-end: 1px solid color-mix(in srgb, var(--steep-ui-border, var(--color-ink-light)) 50%, transparent);
    font-size: 0.95rem;
    padding: 0.6rem 0.75rem;
  }

  .steep-ui-data-table__row:last-child .steep-ui-data-table__td {
    border-block-end: none;
  }

  .steep-ui-data-table--striped .steep-ui-data-table__row:nth-child(even) {
    background: color-mix(in srgb, var(--steep-ui-accent-soft, white) 35%, transparent);
  }

  .steep-ui-data-table--compact .steep-ui-data-table__th,
  .steep-ui-data-table--compact .steep-ui-data-table__td {
    padding: 0.4rem 0.6rem;
    font-size: 0.88rem;
  }

  .steep-ui-data-table__row.is-highlighted {
    background: color-mix(in srgb, var(--steep-ui-accent-soft, white) 75%, transparent);
  }

  .steep-ui-data-table__empty {
    color: var(--steep-ui-muted, var(--color-ink-dark));
    padding: 1.5rem 0.75rem;
    text-align: center;
  }

  .steep-ui-data-table__pill {
    border-radius: 999px;
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    white-space: nowrap;
  }

  .steep-ui-data-table__pill[data-state="yes"] {
    background: color-mix(in srgb, oklch(70% 0.17 150) 20%, transparent);
    color: oklch(38% 0.12 150);
  }

  .steep-ui-data-table__pill[data-state="no"] {
    background: color-mix(in srgb, var(--steep-ui-track, #e5e7eb) 70%, transparent);
    color: var(--steep-ui-muted, var(--color-ink-dark));
  }

  @media (max-width: 640px) {
    .steep-ui-flashcard__actions,
    .steep-ui-flashcard-deck__actions {
      flex-direction: column;
    }

    .steep-ui-flashcard-deck__card {
      padding: 0.7rem;
    }

    .steep-ui-flashcard-deck__text {
      font-size: 0.95rem;
    }

    .steep-ui-flashcard-deck--compact .steep-ui-flashcard-deck__card {
      padding: 0.58rem;
    }

    .steep-ui-flashcard-deck--compact .steep-ui-flashcard-deck__text {
      font-size: 0.88rem;
    }

    .steep-ui-leaderboard__entry {
      grid-template-columns: 1.6rem 1fr auto;
    }

    .steep-ui-data-table__th {
      font-size: 0.78rem;
      padding: 0.45rem 0.55rem;
    }

    .steep-ui-data-table__td {
      font-size: 0.88rem;
      padding: 0.5rem 0.55rem;
    }
  }
}