/* Flashcards — mobile-first styles.
 *
 * Written for a phone held in one hand; wider screens get the same single column, centred.
 * Breakpoints only ever add room (min-width), never take it away.
 */
@import url("https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Inter:wght@400;500;600;700&display=swap");

:root {
  --color-bg: #f8f6f0;
  --color-surface: #ffffff;
  --color-card-1: #e9e0cf;
  --color-card-2: #f0e5da;
  --color-card-3: #f5e7df;
  --color-primary: #111111;
  --color-text: #222222;
  --color-text-light: #565248;
  --color-muted: #8a8678;
  --color-accent: #dc8f64;
  --color-accent-hover: #c77f58;
  --color-accent-strong: #d97757;
  --color-border: #e6e1d7;
  --color-shadow: rgba(0, 0, 0, 0.06);
  --color-success: #57a877;
  --color-success-hover: #4a9969;
  --color-warning: #e29e45;
  --color-warning-hover: #c58a3a;
  --color-error: #d16b6b;

  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.5rem;
  --spacing-6: 2rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 18px;

  --shadow-sm: 0 1px 3px var(--color-shadow);
  --shadow-md: 0 2px 10px var(--color-shadow);
  --shadow-lg: 0 6px 24px rgba(0, 0, 0, 0.08);

  --serif: "DM Serif Display", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --tap: 44px; /* minimum touch target */
}

/* === Base === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--color-primary);
  line-height: 1.2;
}

a {
  color: var(--color-accent-strong);
}

.hidden {
  display: none !important;
}

.app-container {
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: var(--spacing-3) var(--spacing-4) var(--spacing-6);
  padding-left: max(var(--spacing-4), env(safe-area-inset-left));
  padding-right: max(var(--spacing-4), env(safe-area-inset-right));
}

/* === Buttons === */
button {
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: var(--tap);
  padding: 0 var(--spacing-4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}

button:hover {
  background: var(--color-card-2);
}

button:focus-visible,
a:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.primary-btn,
.primary-btn:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  font-weight: 600;
}

.primary-btn:hover {
  background: var(--color-accent-hover);
}

/* Quiet, link-like button */
.text-btn {
  background: transparent;
  border-color: transparent;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.text-btn:hover {
  background: transparent;
  color: var(--color-text);
}

/* Round icon-only button (also used for links) */
.icon-btn,
.user-chip .sign-out-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  min-height: 0;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-light);
  text-decoration: none;
}

.icon-btn:hover,
.user-chip .sign-out-btn:hover {
  background: var(--color-card-2);
  color: var(--color-text);
}

.icon-btn svg,
.user-chip .sign-out-btn svg {
  width: 18px;
  height: 18px;
}

/* The top bar's one primary action: filled, so it reads as "add" rather than a utility icon */
.icon-btn.add-btn {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  box-shadow: 0 2px 8px rgba(217, 119, 87, 0.35);
}

.icon-btn.add-btn:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: white;
}

.icon-btn.add-btn svg {
  width: 22px;
  height: 22px;
}

.icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Armed two-step confirmation (confirm-button.js) */
button.armed,
button.armed:hover {
  background: var(--color-error);
  border-color: var(--color-error);
  color: white;
}

/* === Top bar === */
.topbar {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  min-height: 52px;
  margin-bottom: var(--spacing-4);
}

/* The full name ("YourFlashCards") needs about 385px of top bar next to the add button and the
   account controls; narrower bars, such as on a 375px phone, get the short "YourCards". */
.topbar {
  container-type: inline-size;
}

.title-long {
  display: none;
}

@container (min-width: 392px) {
  .title-long {
    display: inline;
  }

  .title-short {
    display: none;
  }
}

.topbar-title {
  flex: 0 1 auto;
  min-width: 0;
  font-size: 1.625rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Account controls sit at the far right; anything before them stays next to the title */
.topbar-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  flex-shrink: 0;
}

.lang-select {
  appearance: none;
  -webkit-appearance: none;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-surface);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23565248' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  height: 38px;
  padding: 0 26px 0 12px;
  cursor: pointer;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.user-chip .user-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

/* Neutral, so the accent "+" stays the only coloured button in the top bar */
.user-chip .user-initial {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-card-1);
  color: var(--color-text-light);
  font-weight: 600;
}

/* === Panels and notices === */
.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-4);
  margin-bottom: var(--spacing-4);
}

.panel-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-3);
}

.notice {
  background: var(--color-card-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-3) var(--spacing-4);
  margin-bottom: var(--spacing-4);
  text-align: center;
  font-size: 0.9375rem;
}

/* === Study page === */
.mode-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-1);
  padding: var(--spacing-1);
  background: var(--color-card-2);
  border-radius: 999px;
  margin-bottom: var(--spacing-3);
}

.mode-btn {
  min-height: 40px;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-light);
  font-weight: 500;
}

.mode-btn:hover {
  background: rgba(255, 255, 255, 0.5);
}

.mode-btn.active,
.mode-btn.active:hover {
  background: var(--color-surface);
  color: var(--color-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.progress-panel {
  margin-bottom: var(--spacing-5);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  text-align: center;
  margin-bottom: var(--spacing-2);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.1;
  color: var(--color-primary);
}

.stat-known .stat-number {
  color: var(--color-success);
}

.stat-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.progress-bar {
  height: 6px;
  background: var(--color-card-1);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  width: 0;
  height: 100%;
  background: var(--color-success);
  border-radius: 999px;
  transition: width 0.5s ease;
}

.study-footer {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-5);
}

/* --- Flashcard --- */
.flashcard-container {
  perspective: 1000px;
  width: 100%;
  margin: 0 auto;
}

.flashcard {
  position: relative;
  width: 100%;
  height: min(52vh, 340px);
  min-height: 220px;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

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

.card-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-5);
  border-radius: var(--radius-lg);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  text-align: center;
}

.card-front {
  background: var(--color-accent-strong);
  color: white;
}

.card-back {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transform: rotateY(180deg);
}

.card-front .spanish-word {
  color: white;
}

.spanish-word {
  font-family: var(--serif);
  font-size: 2.125rem;
  line-height: 1.15;
  color: var(--color-primary);
  overflow-wrap: anywhere;
}

.translation {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-primary);
  overflow-wrap: anywhere;
}

.example {
  font-size: 0.9375rem;
  font-style: italic;
  color: var(--color-text-light);
}

.category-badge {
  font-size: 0.8125rem;
  font-weight: 600;
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
}

.no-cards-message h3 {
  color: white;
  font-size: 1.375rem;
  margin-bottom: var(--spacing-2);
}

.no-cards-message p,
.no-cards-message a {
  color: white;
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3);
  margin-top: var(--spacing-4);
}

/* flashcard-mode.js toggles this row with an inline display:flex, so size the buttons for both */
.action-btn {
  flex: 1 1 0;
  width: 100%;
  min-width: 0;
  min-height: 52px;
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0 var(--spacing-3);
}

.action-btn span {
  overflow-wrap: anywhere;
}

.know-btn {
  background: var(--color-success);
}

.know-btn:hover {
  background: var(--color-success-hover);
}

.dont-know-btn {
  background: var(--color-warning);
}

.dont-know-btn:hover {
  background: var(--color-warning-hover);
}

/* --- Quiz --- */
.quiz-question {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.3;
  text-align: center;
  color: var(--color-primary);
  min-height: 2.6em;
  margin-bottom: var(--spacing-4);
  overflow-wrap: anywhere;
}

.quiz-question .spanish-highlight,
.spanish-highlight {
  color: var(--color-accent-strong) !important;
  font-family: var(--serif);
}

.quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3);
}

/* Messages shown in place of the options span the whole grid */
.quiz-options > .flashcard-container,
.quiz-options > .quiz-loading-spinner {
  grid-column: 1 / -1;
}

.quiz-card-container {
  perspective: 1000px;
  height: 96px;
  cursor: pointer;
}

.quiz-card {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.quiz-card.flipped {
  transform: rotateY(180deg);
}

.quiz-card-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2) var(--spacing-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  text-align: center;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow-wrap: anywhere;
}

.quiz-card-front {
  transition: border-color 0.15s, box-shadow 0.15s;
}

.quiz-card-front:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.quiz-card-back {
  transform: rotateY(180deg);
}

.quiz-card-back.correct {
  background: var(--color-success);
  border-color: var(--color-success);
  color: white;
}

.quiz-card-back.wrong {
  background: var(--color-warning);
  border-color: var(--color-warning);
  color: white;
}

.quiz-option-text {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.3;
}

.quiz-card-translation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-1);
  font-weight: 600;
}

.quiz-card-translation .icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}

.quiz-card-word {
  font-size: 0.875rem;
  opacity: 0.9;
}

.mobile-hidden {
  display: none;
}

/* --- Loading --- */
.spinner-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-6) 0;
  color: var(--color-muted);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-card-1);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --- Install prompt --- */
.pwa-install-container {
  margin-bottom: var(--spacing-3);
  text-align: center;
}

.pwa-install-btn {
  width: 100%;
  border-style: dashed;
  color: var(--color-text-light);
}

/* --- Footer --- */
.site-footer {
  max-width: 560px;
  margin: 0 auto;
  padding: var(--spacing-4) var(--spacing-4) calc(var(--spacing-5) + env(safe-area-inset-bottom));
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.8125rem;
  text-align: center;
}

.site-footer .footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-1);
}

.site-footer .footer-divider {
  display: none;
}

.site-footer a {
  color: var(--color-muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-accent-strong);
  text-decoration: underline;
}

/* === My Cards === */
.add-word-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.add-word-form input {
  font: inherit;
  font-size: 1rem; /* 16px stops iOS zooming into the field */
  min-height: 48px;
  padding: 0 var(--spacing-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
}

.add-word-form input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface);
}

.add-word-form button {
  min-height: 48px;
}

.word-count {
  color: var(--color-muted);
  font-size: 1rem;
}

.word-list {
  list-style: none;
}

.word-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) 0;
  border-bottom: 1px solid var(--color-border);
}

.word-item:last-child {
  border-bottom: none;
}

.word-item-word {
  flex: 0 1 42%;
  min-width: 0;
  font-family: var(--serif);
  font-size: 1.1875rem;
  color: var(--color-primary);
  overflow-wrap: anywhere;
}

/* Reads as text until tapped */
.word-item-translation {
  flex: 1 1 auto;
  min-width: 0;
  min-height: var(--tap);
  font: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0 var(--spacing-2);
  transition: border-color 0.15s, background-color 0.15s;
}

.word-item-translation::placeholder {
  color: var(--color-muted);
  font-style: italic;
}

.word-item-translation:focus {
  outline: none;
  background: var(--color-bg);
  border-color: var(--color-accent);
}

.word-item-delete {
  flex: 0 0 auto;
  width: var(--tap);
  height: var(--tap);
  padding: 0;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--color-muted);
}

.word-item-delete svg {
  width: 18px;
  height: 18px;
}

.word-item-delete:hover {
  background: var(--color-card-3);
  color: var(--color-error);
}

.word-item-delete.armed,
.word-item-delete.armed:hover {
  width: auto;
  padding: 0 var(--spacing-3);
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 600;
}

.word-list-empty {
  padding: var(--spacing-3) 0;
  color: var(--color-text-light);
  font-style: italic;
}

/* Toast messages, above the home indicator */
.toast-container {
  position: fixed;
  left: 50%;
  bottom: calc(var(--spacing-4) + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  width: calc(100% - 2 * var(--spacing-4));
  max-width: 528px;
  z-index: 100;
  pointer-events: none;
}

.success-message,
.error-message,
.info-message {
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.9375rem;
  color: white;
  pointer-events: auto;
}

.success-message {
  background: var(--color-success);
}

.error-message {
  background: var(--color-error);
}

.info-message {
  background: var(--color-text);
}

/* === Sign-in screen === */
.auth-gate {
  display: none;
  min-height: 100vh;
  min-height: 100dvh;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
}

body.auth-pending .auth-gate,
body.signed-out .auth-gate {
  display: flex;
}

body.auth-pending .app-container,
body.signed-out .app-container,
body.auth-pending .site-footer,
body.signed-out .site-footer {
  display: none;
}

.auth-gate .auth-card,
.auth-gate .auth-loading {
  display: none;
}

body.signed-out .auth-gate .auth-card,
body.auth-pending .auth-gate .auth-loading {
  display: block;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-6) var(--spacing-5);
}

.auth-card h1 {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-3);
}

.auth-card .subtitle {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-5);
}

.lang-switcher {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: var(--spacing-5);
}

.lang-switcher .lang-option {
  min-height: 34px;
  min-width: 48px;
  padding: 0 var(--spacing-3);
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--color-text-light);
  font-size: 0.8125rem;
  font-weight: 600;
}

.lang-switcher .lang-option + .lang-option {
  border-left: 1px solid var(--color-border);
}

.lang-switcher .lang-option.active {
  background: var(--color-accent);
  color: white;
}

.google-signin-btn {
  width: 100%;
  min-height: 48px;
  gap: var(--spacing-3);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.google-icon {
  width: 20px;
  height: 20px;
}

.auth-error {
  color: var(--color-error);
  font-size: 0.875rem;
  margin-top: var(--spacing-3);
  min-height: 1.25rem;
}

.load-problem p {
  margin-bottom: var(--spacing-3);
}

/* === Collections === */
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-2);
}

.panel-head .panel-title {
  margin-bottom: 0;
}

/* One collapsible card per collection */
.collection {
  padding: var(--spacing-2) var(--spacing-3);
}

.collection-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  min-height: 48px;
}

.collection-toggle {
  flex: 1 1 auto;
  min-width: 0;
  min-height: var(--tap);
  justify-content: flex-start;
  gap: var(--spacing-2);
  padding: 0;
  border: none;
  background: transparent;
  text-align: left;
}

.collection-toggle:hover {
  background: transparent;
}

.collection-chevron {
  display: inline-flex;
  flex-shrink: 0;
  color: var(--color-muted);
  transition: transform 0.2s;
}

.collection-chevron svg {
  width: 16px;
  height: 16px;
}

.collection.open .collection-chevron {
  transform: rotate(90deg);
}

.collection-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 600;
  color: var(--color-primary);
}

.collection-count {
  flex-shrink: 0;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.collection-tools {
  display: flex;
  flex-shrink: 0;
}

.icon-tool {
  width: 36px;
  height: 36px;
  min-height: 0;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--color-muted);
}

.icon-tool svg {
  width: 17px;
  height: 17px;
}

.icon-tool:hover {
  background: var(--color-card-3);
  color: var(--color-text);
}

.icon-tool-danger:hover {
  color: var(--color-error);
}

.icon-tool.armed,
.icon-tool.armed:hover {
  width: auto;
  padding: 0 var(--spacing-3);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
}

.collection-rename {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.collection-rename input {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 40px;
  padding: 0 var(--spacing-3);
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-bg);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
}

.collection-rename input:focus {
  outline: none;
}

.collection-body {
  padding: var(--spacing-2) 0 var(--spacing-2);
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-1);
}

.collection-body .add-word-form {
  margin: var(--spacing-2) 0 var(--spacing-3);
}

/* On/off switch: a styled checkbox */
.switch {
  position: relative;
  flex-shrink: 0;
  width: 44px;
  height: 26px;
}

.switch input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}

.switch-track {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: var(--color-card-1);
  transition: background-color 0.2s;
}

.switch-track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: white;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s;
}

.switch input:checked + .switch-track {
  background: var(--color-success);
}

.switch input:checked + .switch-track::after {
  transform: translateX(18px);
}

.switch input:focus-visible + .switch-track {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.collection-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

.chip-btn {
  min-height: 36px;
  padding: 0 var(--spacing-3);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.chip-btn.chip-danger:hover {
  color: var(--color-error);
  border-color: var(--color-error);
  background: var(--color-surface);
}

.inline-form,
.import-panel {
  margin-top: var(--spacing-3);
  padding-top: var(--spacing-3);
  border-top: 1px solid var(--color-border);
}

.inline-form input {
  width: 100%;
  min-height: 48px;
  padding: 0 var(--spacing-4);
  font: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.inline-form input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface);
}

.inline-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-2);
  margin-top: var(--spacing-2);
}

.hint {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-3);
}

.import-panel .primary-btn {
  width: 100%;
  min-height: 48px;
}

.import-library-title {
  font-size: 1.0625rem;
  margin: var(--spacing-4) 0 var(--spacing-2);
}

.library-list {
  list-style: none;
}

.library-item {
  width: 100%;
  min-height: 48px;
  justify-content: space-between;
  text-align: left;
  border: none;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  background: transparent;
  padding: 0 var(--spacing-1);
}

.library-list li:last-child .library-item {
  border-bottom: none;
}

.library-item:hover {
  background: var(--color-card-3);
}

.library-count {
  color: var(--color-muted);
  font-size: 0.8125rem;
  white-space: nowrap;
}

/* === Privacy page and legal links === */
.prose {
  padding: var(--spacing-5);
  line-height: 1.6;
}

.prose h2 {
  font-size: 1.25rem;
  margin: var(--spacing-5) 0 var(--spacing-2);
}

.prose p,
.prose ul {
  margin-bottom: var(--spacing-3);
}

.prose ul {
  padding-left: var(--spacing-5);
}

.prose li {
  margin-bottom: var(--spacing-2);
}

.prose code {
  font-size: 0.875em;
  background: var(--color-card-2);
  border-radius: var(--radius-sm);
  padding: 0 var(--spacing-1);
}

.prose-meta {
  font-size: 0.875rem;
  color: var(--color-muted);
}

.auth-legal {
  margin-top: var(--spacing-3);
  font-size: 0.8125rem;
}

.auth-legal a {
  color: var(--color-muted);
}

/* === Wider screens: more room, same single column === */
@media (min-width: 600px) {
  .app-container {
    padding-top: var(--spacing-5);
  }

  .topbar-title {
    font-size: 2rem;
  }

  .quiz-card-container {
    height: 110px;
  }

  .add-word-form {
    flex-direction: row;
  }

  .add-word-form input {
    flex: 1 1 0;
    min-width: 0;
  }

  .add-word-form button {
    flex: 0 0 auto;
    padding: 0 var(--spacing-5);
  }

  .site-footer .footer-content {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-2);
  }

  .site-footer .footer-divider {
    display: inline;
  }
}