/*
 * css/resource-renderers.css
 *
 * Purpose-built UI for Cognita's educational resource artifacts.
 */

/* ================================================================
   SHARED ARTIFACT
   ================================================================ */

.resource-specialized {
  width: 100%;
}

.resource-artifact-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}

.resource-artifact-kicker {
  display: block;
  margin-bottom: 6px;
  color: var(--text-3);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.resource-artifact-title {
  margin: 0;
  color: var(--text-1);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.resource-artifact-description {
  max-width: 580px;
  margin: 6px 0 0;
  color: var(--text-3);
  font-size: var(--text-sm);
  line-height: 1.55;
}

/* ================================================================
   FLASHCARDS
   ================================================================ */

.resource-flashcards {
  padding-bottom: var(--space-2);
}

.resource-flashcard-progress {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--text-2);
  font-size: var(--text-sm);
  font-weight: 700;
}

.resource-progress-divider {
  color: var(--text-4);
}

.flashcard-study-area {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 44px;
  grid-template-areas: "prev card next";
  align-items: center;
  gap: var(--space-3);
}

.flashcard-nav-prev { grid-area: prev; }
.flashcard-nav-next { grid-area: next; }

.flashcard-nav {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-elevated);
  color: var(--text-2);
  font-size: 1.15rem;
  -webkit-tap-highlight-color: transparent;
  transition:
    background var(--duration-fast) var(--ease),
    border-color var(--duration-fast) var(--ease),
    color var(--duration-fast) var(--ease),
    opacity var(--duration-fast) var(--ease);
}

/* The "Previous" / "Next" words only appear where the buttons become
   wide (phones) — on desktop they stay compact round arrows. */
.flashcard-nav-text {
  display: none;
  font-size: var(--text-sm);
  font-weight: 650;
}

.flashcard-nav:hover:not(:disabled) {
  border-color: var(--border-strong);
  background: var(--bg-subtle);
  color: var(--text-1);
}

.flashcard-nav:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.flashcard-nav:focus-visible,
.flashcard:focus-visible .flashcard-face,
.flashcard-control:focus-visible,
.flashcard-exit-present:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.flashcard {
  --flashcard-image-max: min(56vh, 520px);
  grid-area: card;
  display: block;
  width: 100%;
  min-height: 0;
  padding: 0;
  border: 0;
  background: transparent;
  perspective: 1400px;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* Both faces sit in the SAME grid cell, so the card is always exactly as
   tall as its tallest side — nothing is ever cut off or overlapped, however
   long the question or big the picture. */
.flashcard-inner {
  position: relative;
  display: grid;
  width: 100%;
  min-height: clamp(320px, 46vh, 560px);
  transform-style: preserve-3d;
  transition: transform 480ms cubic-bezier(0.2, 0.75, 0.25, 1);
}

.flashcard.is-flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-face {
  position: relative;
  grid-area: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 0;
  padding: clamp(20px, 4vw, 40px) clamp(16px, 4vw, 44px) clamp(16px, 2.5vw, 24px);
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-md);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  text-align: center;
}

.flashcard-front {
  background:
    radial-gradient(
      circle at top right,
      rgba(127, 127, 127, 0.08),
      transparent 38%
    ),
    var(--bg-elevated);
}

.flashcard-back {
  transform: rotateY(180deg);
  background:
    radial-gradient(
      circle at bottom left,
      rgba(127, 127, 127, 0.08),
      transparent 38%
    ),
    var(--bg-elevated);
}

.flashcard-face-label {
  flex: 0 0 auto;
  margin-bottom: var(--space-3);
  color: var(--text-4);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.1em;
}

/* Picture + text share one centred area that takes all the room between
   the label and the hint. */
.flashcard-face-body {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  width: 100%;
  min-width: 0;
}

.flashcard-face-image {
  display: flex;
  justify-content: center;
  width: 100%;
  border-radius: 16px;
}

.flashcard-face-image[hidden] { display: none; }

/* While a picture is still loading, hold its place with a soft block so
   the card doesn't jump when it appears. */
.flashcard-face-image:not(.is-loaded) {
  min-height: 200px;
  background: var(--bg-subtle);
  animation: flashcard-image-pulse 1.4s ease-in-out infinite;
}

@keyframes flashcard-image-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

/* The whole picture is always shown (never cropped): it grows to fill the
   card's width, and only stops when it reaches the height limit. */
.flashcard-face-image img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: var(--flashcard-image-max);
  object-fit: contain;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  -webkit-user-drag: none;
  user-select: none;
}

.flashcard-face-content {
  max-width: 680px;
  color: var(--text-1);
  font-size: clamp(1.15rem, 2.5vw, 1.75rem);
  font-weight: 650;
  line-height: 1.4;
  overflow-wrap: anywhere;
  white-space: pre-line;
}

/* In normal flow (not floating) so it can never sit on top of the text. */
.flashcard-hint {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-4);
  color: var(--text-4);
  font-size: var(--text-xs);
  font-weight: 500;
}

.flashcard-progress-track {
  height: 4px;
  margin: var(--space-4) 48px 0;
  overflow: hidden;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
}

.flashcard-progress-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 250ms var(--ease);
}

.flashcard-study-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.flashcard-control {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  color: var(--text-2);
  font-size: var(--text-sm);
  font-weight: 650;
  transition:
    background var(--duration-fast) var(--ease),
    border-color var(--duration-fast) var(--ease),
    color var(--duration-fast) var(--ease);
}

.flashcard-control:hover {
  border-color: var(--border-strong);
  color: var(--text-1);
}

.flashcard-control-known.is-selected {
  border-color: var(--accent);
  background: var(--accent-subtle);
  color: var(--accent);
}

.flashcard-control-review.is-selected {
  border-color: var(--warning);
  background: var(--warning-subtle);
  color: var(--warning);
}

.flashcard-status {
  min-height: 20px;
  margin-top: var(--space-3);
  color: var(--text-3);
  font-size: var(--text-xs);
  text-align: center;
}

.flashcard-keyboard-hint {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: var(--space-4);
  color: var(--text-4);
  font-size: 11px;
}

.flashcard-keyboard-hint span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.flashcard-keyboard-hint kbd {
  min-width: 22px;
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--bg-subtle);
  color: var(--text-3);
  font-family: inherit;
  font-size: 10px;
}

/* ================================================================
   QUIZ
   ================================================================ */

.resource-quiz {
  width: 100%;
}

.quiz-score-badge {
  flex-shrink: 0;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--text-2);
  font-size: var(--text-sm);
  font-weight: 700;
}

.quiz-progress {
  margin-bottom: var(--space-5);
}

.quiz-progress-label {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: 7px;
  color: var(--text-3);
  font-size: var(--text-xs);
}

.quiz-progress-track {
  height: 5px;
  overflow: hidden;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
}

.quiz-progress-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 300ms var(--ease);
}

.quiz-question-card {
  padding: clamp(20px, 5vw, 36px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}

.quiz-question-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: var(--space-4);
  border-radius: 10px;
  background: var(--accent-subtle);
  color: var(--accent);
  font-size: var(--text-sm);
  font-weight: 750;
}

.quiz-question-text {
  margin-bottom: var(--space-5);
  color: var(--text-1);
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  font-weight: 650;
  line-height: 1.5;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-option {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 58px;
  padding: 9px 14px 9px 9px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--bg-elevated);
  color: var(--text-1);
  text-align: left;
  transition:
    border-color var(--duration-fast) var(--ease),
    background var(--duration-fast) var(--ease),
    transform var(--duration-fast) var(--ease);
}

.quiz-option:hover:not(:disabled) {
  border-color: var(--border-strong);
  background: var(--bg-subtle);
  transform: translateY(-1px);
}

.quiz-option:disabled {
  cursor: default;
}

.quiz-option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg-subtle);
  color: var(--text-3);
  font-size: var(--text-sm);
  font-weight: 750;
}

.quiz-option-text {
  color: var(--text-1);
  font-size: var(--text-sm);
  line-height: 1.45;
}

.quiz-option.is-selected {
  border-color: var(--accent);
  background: var(--accent-subtle);
}

.quiz-option.is-selected .quiz-option-letter {
  background: var(--accent);
  color: #fff;
}

.quiz-option.is-correct {
  border-color: var(--success);
  background: var(--success-subtle);
}

.quiz-option.is-correct .quiz-option-letter {
  background: var(--success);
  color: #fff;
}

.quiz-option.is-incorrect {
  border-color: var(--danger);
  background: var(--danger-subtle);
}

.quiz-option.is-incorrect .quiz-option-letter {
  background: var(--danger);
  color: #fff;
}

.quiz-feedback {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-top: var(--space-4);
  padding: 13px 15px;
  border-radius: 12px;
  font-size: var(--text-sm);
  line-height: 1.5;
}

.quiz-feedback.is-correct {
  background: var(--success-subtle);
  color: var(--success);
}

.quiz-feedback.is-incorrect {
  background: var(--danger-subtle);
  color: var(--danger);
}

.quiz-feedback.is-warning {
  background: var(--warning-subtle);
  color: var(--warning);
}

.quiz-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.quiz-control {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 650;
}

.quiz-control-secondary {
  background: var(--bg-elevated);
  color: var(--text-2);
}

.quiz-control-primary {
  background: var(--text-1);
  color: var(--bg-base);
}

.quiz-control:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.quiz-complete {
  padding: clamp(28px, 7vw, 54px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  text-align: center;
}

.quiz-complete-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-4);
  border-radius: 18px;
  background: var(--accent-subtle);
  color: var(--accent);
  font-size: 1.6rem;
}

.quiz-complete h3 {
  margin: 4px 0 8px;
  color: var(--text-1);
  font-size: 2rem;
}

.quiz-complete p {
  max-width: 480px;
  margin: 0 auto var(--space-5);
  color: var(--text-3);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* ================================================================
   WORKSHEET
   ================================================================ */

.resource-worksheet {
  color: var(--text-1);
}

.worksheet-header {
  padding: clamp(22px, 5vw, 34px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: var(--bg-elevated);
}

.worksheet-brand {
  margin-bottom: var(--space-5);
  color: var(--accent);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.worksheet-title-block h3 {
  margin: 0;
  color: var(--text-1);
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 750;
  letter-spacing: -0.025em;
}

.worksheet-student-fields {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 18px;
  margin-top: 28px;
}

.worksheet-student-fields > div {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.worksheet-student-fields span {
  color: var(--text-3);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.worksheet-student-fields div > div {
  height: 25px;
  border-bottom: 1px solid var(--border-strong);
}

.worksheet-instructions {
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-top: 0;
  background: var(--bg-subtle);
}

.worksheet-instructions strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text-1);
  font-size: var(--text-sm);
}

.worksheet-instructions p {
  margin: 0;
  color: var(--text-2);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.worksheet-questions {
  display: flex;
  flex-direction: column;
}

.worksheet-question {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 15px;
  padding: 25px 10px;
  border-bottom: 1px solid var(--border);
}

.worksheet-question-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--bg-subtle);
  color: var(--text-2);
  font-size: var(--text-xs);
  font-weight: 750;
}

.worksheet-question-type {
  margin-bottom: 7px;
  color: var(--text-4);
  font-size: 10px;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.worksheet-question-text {
  color: var(--text-1);
  font-size: var(--text-sm);
  font-weight: 550;
  line-height: 1.6;
}

.worksheet-answer-lines {
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-top: 22px;
}

.worksheet-answer-lines div {
  height: 1px;
  background: var(--border);
}

.worksheet-question-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 16px;
  margin-top: 14px;
}

.worksheet-question-option {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--text-2);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.worksheet-question-option-letter {
  flex: none;
  color: var(--text-4);
  font-weight: 750;
}

.worksheet-answer-key {
  margin-top: var(--space-6);
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-subtle);
}

.worksheet-answer-key-header h4 {
  margin: 0;
  color: var(--text-1);
  font-size: var(--text-lg);
}

.worksheet-answer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: var(--space-4);
}

.worksheet-answer-item {
  display: flex;
  gap: 10px;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-elevated);
  color: var(--text-2);
  font-size: var(--text-xs);
  line-height: 1.45;
}

.worksheet-answer-item strong {
  color: var(--text-1);
}

/* ================================================================
   EMPTY STATE
   ================================================================ */

.resource-empty-state {
  padding: 50px 24px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.resource-empty-state-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  border-radius: 14px;
  background: var(--bg-subtle);
  color: var(--text-3);
  font-size: 1.3rem;
}

.resource-empty-state h3 {
  margin: 0 0 5px;
  color: var(--text-1);
  font-size: var(--text-base);
}

.resource-empty-state p {
  margin: 0;
  color: var(--text-3);
  font-size: var(--text-sm);
}

/* ================================================================
   MOBILE
   ================================================================ */

@media (max-width: 640px) {
  .resource-artifact-header {
    flex-direction: column;
    gap: 12px;
  }

  .resource-result-body.is-flashcard-view {
    padding: 12px;
  }

  .resource-flashcards .resource-artifact-description {
    display: none;
  }

  .resource-flashcards .flashcard-header {
    margin-bottom: 12px;
    gap: 8px;
  }

  /* Phones: the card gets the FULL width (so pictures are as big as
     possible) and Previous / Next become big, easy thumb targets under it. */
  .flashcard-study-area {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "card card"
      "prev next";
    gap: 12px;
  }

  .flashcard {
    --flashcard-image-max: min(52vh, 440px);
  }

  .flashcard-nav {
    width: 100%;
    height: 48px;
    border-radius: var(--radius-full);
    font-size: 1.05rem;
  }

  .flashcard-nav-text { display: inline; }

  .flashcard-inner {
    min-height: 300px;
  }

  .flashcard-face {
    padding: 18px 14px 14px;
    border-radius: 20px;
  }

  .flashcard-face-content {
    font-size: 1.2rem;
  }

  .flashcard-progress-track {
    margin-left: 0;
    margin-right: 0;
  }

  .flashcard-study-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .flashcard-control {
    width: 100%;
    min-height: 44px;
  }

  .flashcard-control-present {
    grid-column: 1 / -1;
  }

  .quiz-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .quiz-control-primary[data-quiz-check],
  .quiz-control-primary[data-quiz-next] {
    grid-column: span 1;
  }

  .worksheet-student-fields {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .worksheet-question {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
    padding-left: 0;
    padding-right: 0;
  }

  .worksheet-answer-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Lesson Note — calm, textbook-style reading surface ── */
.resource-lesson-note { }

.lesson-note-page {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-2) 0;
}

.lesson-note-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text-1);
  margin: 6px 0 var(--space-4);
}

.lesson-note-intro {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-2);
  margin-bottom: var(--space-6);
}

.lesson-note-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.lesson-note-heading {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: var(--space-2);
}

.lesson-note-paragraph {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-1);
}

.lesson-note-bullets,
.lesson-note-numbered {
  padding-left: 1.3em;
  line-height: var(--leading-relaxed);
  color: var(--text-1);
}
.lesson-note-bullets li,
.lesson-note-numbered li { margin-bottom: 6px; }

.lesson-note-definitions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.lesson-note-definition {
  padding-left: var(--space-3);
  border-left: 2px solid var(--border-strong);
}
.lesson-note-definition dt {
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 2px;
}
.lesson-note-definition dd {
  margin: 0;
  color: var(--text-2);
  line-height: var(--leading-body);
}

.lesson-note-example {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.lesson-note-example-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 6px;
}
.lesson-note-example p { margin: 0; line-height: var(--leading-body); }

.lesson-note-formula {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  white-space: pre-wrap;
  color: var(--text-1);
}

.lesson-note-summary {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}
.lesson-note-summary-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-3);
  margin-bottom: 6px;
}
.lesson-note-summary p {
  margin: 0;
  color: var(--text-1);
  line-height: var(--leading-relaxed);
}


/* ================================================================
   FLASHCARDS — extras: present mode, header, touch, motion
   ================================================================ */

/* The flashcard view lets the page scroll instead of trapping the deck in
   a small scrolling box (the generic result body caps its height). */
.resource-result-body.is-flashcard-view {
  max-height: none;
  overflow: visible;
}

.flashcard-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.flashcard-exit-present {
  display: none;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  color: var(--text-1);
  font-size: var(--text-sm);
  font-weight: 700;
}

.flashcard-control-present {
  border-color: var(--accent);
  background: var(--accent-subtle);
  color: var(--accent);
}

.flashcard-control-present:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Present mode: the card fills the whole screen ── */
.resource-flashcards.is-presenting {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  padding:
    max(12px, env(safe-area-inset-top))
    max(12px, env(safe-area-inset-right))
    max(12px, env(safe-area-inset-bottom))
    max(12px, env(safe-area-inset-left));
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  background: var(--bg-base);
  outline: none;
}

.is-presenting .flashcard-header {
  margin-bottom: var(--space-3);
  align-items: center;
}

.is-presenting .flashcard-header-text,
.is-presenting .flashcard-study-controls,
.is-presenting .flashcard-status,
.is-presenting .flashcard-keyboard-hint,
.is-presenting .flashcard-hint {
  display: none;
}

.is-presenting .flashcard-header-actions {
  width: 100%;
  justify-content: space-between;
}

.is-presenting .flashcard-exit-present {
  display: inline-flex;
}

.is-presenting .flashcard-study-area {
  flex: 1 0 auto;
}

.is-presenting .flashcard {
  --flashcard-image-max: min(64vh, 1000px);
  --flashcard-image-max: min(64dvh, 1000px);
}

.is-presenting .flashcard-inner {
  min-height: max(300px, calc(100vh - 210px));
  min-height: max(300px, calc(100dvh - 210px));
}

.is-presenting .flashcard-face {
  padding: clamp(16px, 3vw, 36px);
}

.is-presenting .flashcard-face-content {
  max-width: 1100px;
  font-size: clamp(1.6rem, 4.2vw, 3.4rem);
  line-height: 1.3;
}

.is-presenting .flashcard-face-label {
  font-size: var(--text-sm);
}

.is-presenting .flashcard-progress-track {
  margin-top: var(--space-3);
}

/* Phone held sideways: there is very little height, so put the picture
   and the question next to each other instead of stacking them. */
@media (orientation: landscape) and (max-height: 520px) {
  .is-presenting .flashcard {
    --flashcard-image-max: 62vh;
    --flashcard-image-max: 62dvh;
  }

  .is-presenting .flashcard-face-body {
    flex-direction: row;
    gap: var(--space-5);
  }

  .is-presenting .flashcard-face-image {
    flex: 1 1 55%;
    width: auto;
  }

  .is-presenting .flashcard-face-content {
    flex: 1 1 45%;
    font-size: clamp(1.2rem, 3.4vw, 2rem);
  }

  /* Counter and Exit float over the corners so the card can use the
     full height of the screen. */
  .is-presenting .flashcard-header {
    position: absolute;
    top: max(8px, env(safe-area-inset-top));
    left: max(12px, env(safe-area-inset-left));
    right: max(12px, env(safe-area-inset-right));
    z-index: 2;
    margin: 0;
    pointer-events: none;
  }

  .is-presenting .flashcard-header-actions > * {
    pointer-events: auto;
  }

  .is-presenting .flashcard-inner {
    min-height: max(200px, calc(100vh - 56px));
    min-height: max(200px, calc(100dvh - 56px));
  }

  .is-presenting .flashcard-face {
    padding: 14px 20px;
  }

  .is-presenting .flashcard {
    --flashcard-image-max: calc(100vh - 110px);
    --flashcard-image-max: calc(100dvh - 110px);
  }
}

/* Keyboard hints make no sense on a touch screen. */
@media (hover: none) {
  .flashcard-keyboard-hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .flashcard-inner { transition: none; }
  .flashcard-face-image:not(.is-loaded) { animation: none; }
}

@media (max-width: 640px) {
  .is-presenting .flashcard-face {
    padding: 14px 10px;
  }
}