/* FlashCards — shared app styles (mobile-first, Bootstrap 5 utility-first)
 * Palette/typography inspired by leavemealone.com: warm cream backgrounds,
 * a sand/amber primary, generous rounded corners and whitespace, a
 * friendly rounded display font for headings/buttons.
 */

:root {
  --brand-cream: #fffaf7;
  --brand-cream-deep: #f7ede7;
  --brand-sand: #e3a93f;
  --brand-sand-dark: #c48a2b;
  --brand-sand-tint: #fbf0d9;
  --brand-gold: #d9be6b;
  --brand-gold-dark: #bd9c46;
  --brand-gold-tint: #faf1d9;
  --brand-sage: #8fb996;
  --brand-sage-dark: #6f9c78;
  --brand-terracotta: #e2694f;
  --brand-terracotta-dark: #c2503a;
  --brand-plum: #b98cae;
  --brand-ink: #241f1f;
  --brand-ink-soft: #746863;
  --brand-border: #efe2da;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --shadow-soft: 0 10px 30px rgba(36, 31, 31, 0.08);
  --shadow-hover: 0 16px 36px rgba(36, 31, 31, 0.14);
  --font-display: "Fredoka", "Segoe UI", Roboto, sans-serif;
  --font-body: "Nunito Sans", "Segoe UI", Roboto, sans-serif;
}

body {
  background: var(--brand-cream);
  color: var(--brand-ink);
  font-family: var(--font-body);
}

h1, h2, h3, h4, h5, h6, .navbar-brand, .btn, .brand-display {
  font-family: var(--font-display);
  font-weight: 600;
}

a {
  color: var(--brand-sand-dark);
}

/* Buttons: generous rounded-pill, warm palette --------------------- */

.btn {
  min-height: 44px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.btn-sm {
  min-height: 34px;
  padding-left: 0.9rem;
  padding-right: 0.9rem;
}

.btn-primary {
  --bs-btn-color: var(--brand-ink);
  --bs-btn-bg: var(--brand-sand);
  --bs-btn-border-color: var(--brand-sand);
  --bs-btn-hover-color: var(--brand-ink);
  --bs-btn-hover-bg: var(--brand-sand-dark);
  --bs-btn-hover-border-color: var(--brand-sand-dark);
  --bs-btn-active-color: var(--brand-ink);
  --bs-btn-active-bg: var(--brand-sand-dark);
  --bs-btn-active-border-color: var(--brand-sand-dark);
  --bs-btn-disabled-bg: var(--brand-sand);
  --bs-btn-disabled-border-color: var(--brand-sand);
  --bs-btn-focus-shadow-rgb: 227, 169, 63;
}

.btn-outline-primary {
  --bs-btn-color: var(--brand-sand-dark);
  --bs-btn-border-color: var(--brand-sand);
  --bs-btn-hover-color: var(--brand-ink);
  --bs-btn-hover-bg: var(--brand-sand);
  --bs-btn-hover-border-color: var(--brand-sand);
  --bs-btn-active-color: var(--brand-ink);
  --bs-btn-active-bg: var(--brand-sand);
  --bs-btn-active-border-color: var(--brand-sand);
  --bs-btn-focus-shadow-rgb: 227, 169, 63;
}

.btn-success {
  --bs-btn-bg: var(--brand-sage);
  --bs-btn-border-color: var(--brand-sage);
  --bs-btn-hover-bg: var(--brand-sage-dark);
  --bs-btn-hover-border-color: var(--brand-sage-dark);
  --bs-btn-active-bg: var(--brand-sage-dark);
  --bs-btn-active-border-color: var(--brand-sage-dark);
  --bs-btn-focus-shadow-rgb: 143, 185, 150;
}

.btn-danger {
  --bs-btn-bg: var(--brand-terracotta);
  --bs-btn-border-color: var(--brand-terracotta);
  --bs-btn-hover-bg: var(--brand-terracotta-dark);
  --bs-btn-hover-border-color: var(--brand-terracotta-dark);
  --bs-btn-active-bg: var(--brand-terracotta-dark);
  --bs-btn-active-border-color: var(--brand-terracotta-dark);
  --bs-btn-focus-shadow-rgb: 226, 105, 79;
}

.btn-outline-secondary {
  --bs-btn-color: var(--brand-ink-soft);
  --bs-btn-border-color: var(--brand-border);
  --bs-btn-hover-bg: var(--brand-cream-deep);
  --bs-btn-hover-color: var(--brand-ink);
  --bs-btn-hover-border-color: var(--brand-border);
}

/* Nav ---------------------------------------------------------------- */

.brand-nav {
  background: var(--brand-cream);
  border-bottom: 1px solid var(--brand-border);
}

/* 1fr / auto / 1fr keeps the nav links mathematically centered no matter
 * how wide the brand on the left or the lang/account controls on the right
 * end up being. */
.brand-nav-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.75rem;
}

.navbar-brand {
  justify-self: start;
}

.nav-links {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--brand-ink-soft);
  font-weight: 600;
  text-decoration: none;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--brand-ink);
}

.nav-link.active {
  color: var(--brand-sand-dark);
  border-bottom-color: var(--brand-sand);
}

.nav-right {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.user-name {
  color: var(--brand-ink-soft);
  font-size: 0.9rem;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Auth pages (sign in / beta signup) --------------------------------- */

.auth-page {
  display: flex;
  justify-content: center;
}

.auth-card {
  width: 100%;
  max-width: 420px;
}

.lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: none;
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-pill);
  padding: 0.35rem 0.75rem;
  cursor: pointer;
}

.lang-trigger:hover,
.lang-trigger:focus {
  background: var(--brand-cream-deep);
}

.lang-trigger .lang-flag {
  font-size: 1.15rem;
  line-height: 1;
}

.lang-trigger .lang-caret {
  font-size: 0.7rem;
  color: var(--brand-ink-soft);
}

/* Language modal ----------------------------------------------------- */

.modal-content {
  border: none;
  border-radius: var(--radius-lg);
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
  background: #fff;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--brand-ink);
  text-align: left;
}

.lang-option:hover {
  background: var(--brand-cream-deep);
}

.lang-option.active {
  border-color: var(--brand-sand);
  background: var(--brand-sand-tint);
}

.lang-option .lang-flag {
  font-size: 1.3rem;
  line-height: 1;
}

.lang-option .lang-check {
  margin-left: auto;
  color: var(--brand-sand-dark);
  font-weight: 700;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--brand-sand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.navbar-brand {
  color: var(--brand-ink) !important;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.25rem;
}

/* Cards ---------------------------------------------------------------- */

.card {
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

/* Hero / intro banner -------------------------------------------------- */

.hero-banner {
  background: var(--brand-sand-tint);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  margin-bottom: 2.5rem;
}

.hero-banner p {
  color: var(--brand-ink-soft);
}

.group-heading {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brand-ink-soft);
}

.group-heading::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--brand-gold);
  flex-shrink: 0;
}

/* Deck grid -------------------------------------------------------- */

.deck-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

/* Homepage hub (Memory Flashcards / Tests) reuses the deck-grid/deck-card
 * look with just two big options, so it should collapse empty tracks
 * instead of stretching across the full row width. */
.hub-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  max-width: 640px;
  margin: 0 auto;
}

.hub-grid .deck-avatar {
  width: 56px;
  height: 56px;
  font-size: 1.75rem;
}

.deck-card {
  text-decoration: none;
  color: inherit;
}

.deck-card .card {
  height: 100%;
  transition: box-shadow 0.15s ease-in-out, transform 0.15s ease-in-out;
}

.deck-card:hover .card,
.deck-card:focus .card {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.deck-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-family: var(--font-display);
}

/* Study view -------------------------------------------------------- */

.study-card {
  max-width: 640px;
  margin: 0 auto;
}

.study-answer[hidden] {
  display: none !important;
}

.study-answer {
  border-color: var(--brand-border) !important;
}

/* Test view (multiple-choice feedback) ------------------------------- */

.answer-option {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 1rem;
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
}

.answer-option.correct {
  border-color: var(--brand-sage);
  background: var(--brand-sage);
  color: #fff;
  font-weight: 600;
}

.answer-option.incorrect {
  border-color: var(--brand-terracotta);
  background: var(--brand-terracotta);
  color: #fff;
  font-weight: 600;
}

.progress {
  border-radius: var(--radius-pill);
  background-color: var(--brand-cream-deep);
}

.progress-bar {
  background-color: var(--brand-sand);
}

.alert {
  border: none;
  border-radius: var(--radius-md);
  background: var(--brand-gold-tint);
  color: var(--brand-ink);
}

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

.brand-footer {
  background: var(--brand-cream-deep);
  border-top: 1px solid var(--brand-border);
  color: var(--brand-ink-soft);
}

.brand-footer a {
  color: var(--brand-sand-dark);
  font-weight: 600;
  text-decoration: none;
}

.brand-footer a:hover {
  text-decoration: underline;
}

/* Below this width the brand + nav links + lang/account controls no
 * longer fit on one row, so stack them instead of letting them wrap
 * mid-line. */
@media (max-width: 768px) {
  .brand-nav-row {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 0.5rem;
    padding-block: 0.5rem;
  }

  .navbar-brand,
  .nav-links,
  .nav-right {
    justify-self: center;
  }
}

@media (max-width: 576px) {
  .user-name {
    display: none;
  }

  .study-grading-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 0.75rem;
    background: var(--brand-cream);
    border-top: 1px solid var(--brand-border);
    z-index: 10;
  }

  main {
    padding-bottom: 5rem;
  }

  .hero-banner {
    padding: 1.5rem 1.25rem;
  }

  .navbar-brand {
    font-size: 1rem;
  }

  .navbar-brand .brand-logo {
    width: 30px;
    height: 30px;
    font-size: 0.95rem;
  }
}