/* ==========================================================================
   BCMA Guide Exam Preparation -- design tokens
   Palette: field-guide, not tech-app. Deep evergreen + bark brown on warm
   paper, with a growth-ring motif (the app's signature element) used for
   score/progress displays -- a nod to counting tree rings.
   ========================================================================== */

:root {
  --color-bg: #F6F3EA;
  --color-paper: #FFFFFF;
  --color-ink: #23301E;
  --color-ink-soft: #55604C;
  --color-forest: #2F4B3C;
  --color-forest-dark: #1C2E24;
  --color-bark: #6B4A32;
  --color-moss: #8FA37A;
  --color-moss-pale: #E4E9DC;
  --color-gold: #C1832C;
  --color-correct: #3C6E47;
  --color-correct-bg: #E4F0E3;
  --color-incorrect: #A6402E;
  --color-incorrect-bg: #F7E5E1;
  --color-border: #DAD3C1;

  --font-display: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 2px 10px rgba(35, 48, 30, 0.10);
  --shadow-raised: 0 6px 20px rgba(35, 48, 30, 0.16);

  --footer-height: 72px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; }

button, input, select {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------------------------------------------------------------------- */
/* Header                                                                  */
/* ---------------------------------------------------------------------- */

.site-header {
  background: var(--color-forest-dark);
  padding: 18px 20px;
  text-align: center;
  border-bottom: 3px solid var(--color-bark);
}

.site-header__title {
  margin: 0;
  color: var(--color-bg);
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 4vw, 1.6rem);
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* ---------------------------------------------------------------------- */
/* Main / layout                                                          */
/* ---------------------------------------------------------------------- */

.site-main {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px calc(var(--footer-height) + 32px);
}

.page-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-forest-dark);
  margin: 4px 0 18px;
}

.page-subtitle {
  color: var(--color-ink-soft);
  margin: -12px 0 20px;
  font-size: 0.95rem;
}

/* ---------------------------------------------------------------------- */
/* Footer nav                                                             */
/* ---------------------------------------------------------------------- */

.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-paper);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 14px rgba(35, 48, 30, 0.08);
  z-index: 20;
}

.footer-nav {
  max-width: 720px;
  margin: 0 auto;
  height: var(--footer-height);
  display: flex;
}

.footer-nav__btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  text-decoration: none;
  color: var(--color-ink-soft);
  font-size: 0.78rem;
  font-weight: 600;
  border-top: 3px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.footer-nav__icon {
  width: 24px;
  height: 24px;
}

.footer-nav__btn.is-active,
.footer-nav__btn:hover {
  color: var(--color-forest);
  border-top-color: var(--color-forest);
}

/* ---------------------------------------------------------------------- */
/* Flash messages                                                         */
/* ---------------------------------------------------------------------- */

.flash-stack {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.flash {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
}

.flash--error {
  background: var(--color-incorrect-bg);
  color: var(--color-incorrect);
  border: 1px solid var(--color-incorrect);
}

.flash--info {
  background: var(--color-moss-pale);
  color: var(--color-forest-dark);
  border: 1px solid var(--color-moss);
}

/* ---------------------------------------------------------------------- */
/* Buttons / form controls (shared)                                       */
/* ---------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.08s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:active { transform: scale(0.98); }

.btn--primary {
  background: var(--color-forest);
  color: #fff;
  box-shadow: var(--shadow-card);
}
.btn--primary:hover { background: var(--color-forest-dark); }

.btn--secondary {
  background: var(--color-paper);
  color: var(--color-forest-dark);
  border: 1.5px solid var(--color-border);
}
.btn--secondary:hover { border-color: var(--color-forest); }

.btn--block { width: 100%; }

.btn--sm { padding: 8px 14px; font-size: 0.85rem; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.select-field {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background: var(--color-paper);
  color: var(--color-ink);
  font-size: 0.95rem;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2355604C'%3E%3Cpath d='M5.5 7.5l4.5 5 4.5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.field-group {
  margin-bottom: 16px;
}

.field-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--color-ink-soft);
}

.text-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  font-size: 0.95rem;
}

/* ---------------------------------------------------------------------- */
/* Auth pages                                                             */
/* ---------------------------------------------------------------------- */

.auth-card {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  box-shadow: var(--shadow-card);
  max-width: 380px;
  margin: 40px auto 0;
}

.auth-card__title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-forest-dark);
  margin: 0 0 18px;
  text-align: center;
}

.auth-card__footer {
  text-align: center;
  margin-top: 14px;
  font-size: 0.88rem;
  color: var(--color-ink-soft);
}

/* ---------------------------------------------------------------------- */
/* Home page                                                              */
/* ---------------------------------------------------------------------- */

.home-hero {
  text-align: center;
  padding: 28px 12px 10px;
}

.home-hero__rings {
  width: 96px;
  height: 96px;
  margin: 0 auto 16px;
}

.home-hero__welcome {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-forest-dark);
  margin: 0 0 6px;
}

.home-hero__subtitle {
  color: var(--color-ink-soft);
  font-size: 0.95rem;
  margin: 0 0 26px;
}

.home-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 520px) {
  .home-cards { grid-template-columns: 1fr 1fr; }
}

.home-card {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: var(--color-ink);
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 3px solid var(--color-moss);
  transition: box-shadow 0.15s ease, transform 0.1s ease;
}

.home-card:hover { box-shadow: var(--shadow-raised); transform: translateY(-1px); }

.home-card__title { font-weight: 700; font-family: var(--font-display); font-size: 1.05rem; }
.home-card__desc { font-size: 0.85rem; color: var(--color-ink-soft); }

/* ---------------------------------------------------------------------- */
/* Vocabulary flashcards                                                  */
/* ---------------------------------------------------------------------- */

.study-picker {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-card);
  margin-bottom: 22px;
}

.study-picker__label {
  font-weight: 700;
  color: var(--color-forest-dark);
  margin-bottom: 10px;
  display: block;
}

.deck-progress {
  text-align: center;
  color: var(--color-ink-soft);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.flashcard-stage {
  perspective: 1400px;
  height: 320px;
  margin: 0 auto 18px;
  max-width: 480px;
}

.flashcard {
  position: relative;
  width: 100%;
  height: 100%;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.4, 0.2, 0.2, 1);
}

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

.flashcard__face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-raised);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px;
  text-align: center;
}

.flashcard__face--front {
  background: var(--color-forest);
  color: #fff;
}

.flashcard__face--back {
  background: var(--color-paper);
  color: var(--color-ink);
  transform: rotateY(180deg);
  border: 2px solid var(--color-moss);
}

.flashcard__chapter-tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.75;
  margin-bottom: 10px;
}

.flashcard__term {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.25;
}

.flashcard__definition {
  font-size: 1.05rem;
  line-height: 1.5;
}

.flashcard-hint {
  text-align: center;
  color: var(--color-ink-soft);
  font-size: 0.85rem;
  margin: 0 0 20px;
}

.card-controls {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.card-controls .btn { flex: 1; max-width: 160px; }
.card-controls svg { width: 18px; height: 18px; }

/* ---------------------------------------------------------------------- */
/* Quiz taking                                                            */
/* ---------------------------------------------------------------------- */

.quiz-progress-bar {
  height: 6px;
  background: var(--color-moss-pale);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 6px;
}

.quiz-progress-bar__fill {
  height: 100%;
  background: var(--color-forest);
  transition: width 0.3s ease;
}

.quiz-progress-label {
  font-size: 0.82rem;
  color: var(--color-ink-soft);
  margin-bottom: 18px;
  display: flex;
  justify-content: space-between;
}

.question-image {
  width: 100%;
  max-height: 260px;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: var(--color-moss-pale);
  margin-bottom: 16px;
}

.question-image-pending {
  width: 100%;
  padding: 30px 16px;
  border-radius: var(--radius-md);
  background: var(--color-moss-pale);
  color: var(--color-ink-soft);
  text-align: center;
  font-size: 0.82rem;
  margin-bottom: 16px;
}

.question-text {
  font-size: 1.08rem;
  line-height: 1.5;
  margin-bottom: 20px;
  color: var(--color-ink);
}

.choice-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}

.choice-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background: var(--color-paper);
  cursor: pointer;
  transition: border-color 0.12s ease, background 0.12s ease;
}

.choice-option:hover { border-color: var(--color-moss); }

.choice-option input[type="radio"] {
  margin-top: 3px;
  accent-color: var(--color-forest);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.choice-option.is-selected {
  border-color: var(--color-forest);
  background: var(--color-moss-pale);
}

.choice-letter {
  font-weight: 700;
  color: var(--color-forest-dark);
}

/* Review states (results detail) */
.choice-option.is-correct-answer {
  border-color: var(--color-correct);
  background: var(--color-correct-bg);
  color: var(--color-correct);
}
.choice-option.is-wrong-answer {
  border-color: var(--color-incorrect);
  background: var(--color-incorrect-bg);
  color: var(--color-incorrect);
}

/* ---------------------------------------------------------------------- */
/* Results                                                                */
/* ---------------------------------------------------------------------- */

.score-hero {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 26px 20px;
  text-align: center;
  margin-bottom: 22px;
}

.score-ring-wrap {
  width: 140px;
  height: 140px;
  margin: 0 auto 12px;
  position: relative;
}

.score-ring-wrap svg { width: 100%; height: 100%; }

.score-ring-value {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-forest-dark);
}

.score-hero__label { color: var(--color-ink-soft); font-size: 0.9rem; }

.review-table {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.review-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-paper);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  box-shadow: var(--shadow-card);
}

.review-row__num {
  font-weight: 700;
  color: var(--color-ink-soft);
  width: 34px;
  flex-shrink: 0;
}

.review-row__mark {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
}

.review-row__mark--correct { color: var(--color-correct); }
.review-row__mark--incorrect { color: var(--color-incorrect); }

.review-row__spacer { flex: 1; }

.btn--view-correct {
  background: transparent;
  color: var(--color-correct);
  border: 1.5px solid var(--color-correct);
}
.btn--view-incorrect {
  background: transparent;
  color: var(--color-incorrect);
  border: 1.5px solid var(--color-incorrect);
}

.answer-detail {
  display: none;
  margin-top: 10px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
}
.answer-detail.is-open { display: block; }

.answer-detail__explanation {
  margin-top: 12px;
  padding: 12px 14px;
  background: var(--color-moss-pale);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--color-forest-dark);
  line-height: 1.5;
}

/* Results landing: mode list */

.mode-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mode-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: var(--color-paper);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: var(--color-ink);
}

.mode-row__label {
  font-weight: 600;
  font-size: 0.95rem;
}

.mode-row__meta {
  font-size: 0.78rem;
  color: var(--color-ink-soft);
}

.mode-row__avg {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-forest-dark);
  min-width: 52px;
  text-align: right;
}

.mode-row__avg--empty {
  color: var(--color-ink-soft);
  font-size: 0.8rem;
  font-weight: 500;
}

.section-divider {
  margin: 22px 0 12px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
  font-weight: 700;
}

.attempt-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.attempt-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-paper);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-card);
}

.attempt-row__score {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  width: 60px;
  color: var(--color-forest-dark);
}

.attempt-row__date {
  flex: 1;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}

.empty-state {
  text-align: center;
  color: var(--color-ink-soft);
  padding: 30px 16px;
  font-size: 0.9rem;
}