@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Source+Serif+4:wght@500;600&display=swap');

:root {
  color-scheme: light;
  --bg: #f6f0e6;
  --bg-alt: #d6e4f0;
  --ink: #1c1d1f;
  --muted: #5a5f66;
  --accent: #ef6b4f;
  --accent-dark: #c5533b;
  --card: #ffffffee;
  --border: #d9d3cb;
  --chip: #f0e4d4;
  --success: #1c8f5a;
  --danger: #c8452b;
  --shadow: 0 24px 60px rgba(18, 18, 18, 0.18);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-base: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(18, 18, 18, 0.06);
  --shadow-md: 0 8px 24px rgba(18, 18, 18, 0.1);
  --shadow-lg: 0 24px 60px rgba(18, 18, 18, 0.18);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  /* Transitions */
  --transition-fast: 150ms;
  --transition-base: 250ms;
  --transition-slow: 400ms;

  /* Surfaces & colors */
  --bg-surface: #ffffff;
  --accent-glow: rgba(239, 107, 79, 0.25);
  --success-bg: rgba(28, 143, 90, 0.1);
  --danger-bg: rgba(200, 69, 43, 0.08);
  --danger-surface: #fff3f0;
  --danger-border: #f0c6b7;
  --ghost-hover: rgba(28, 29, 31, 0.06);
  --modal-backdrop: rgba(20, 20, 20, 0.4);
  --wait-bg: #fdfaf7;
  --icon-bg: #fff7f3;
  --icon-border: #f0c6b7;
  --card-blob-color: rgba(239, 107, 79, 0.25);
  --noise-opacity: 0.25;
  --level-chip-bg: #f6efe6;
  --words-group-bg: #fbf5ec;
  --modal-content-bg: #fffaf4;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1a1a2e;
  --bg-alt: #16213e;
  --ink: #e8e6e3;
  --muted: #9a9da3;
  --accent: #f07b62;
  --accent-dark: #d96248;
  --card: #2a2a3eee;
  --border: #3d3d52;
  --chip: #3a3a50;
  --success: #2db570;
  --danger: #e05a42;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.4);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.4);

  --bg-surface: #2a2a3e;
  --accent-glow: rgba(240, 123, 98, 0.3);
  --success-bg: rgba(45, 181, 112, 0.15);
  --danger-bg: rgba(224, 90, 66, 0.12);
  --danger-surface: #3a2a2a;
  --danger-border: #5a3a35;
  --ghost-hover: rgba(232, 230, 227, 0.08);
  --modal-backdrop: rgba(10, 10, 20, 0.6);
  --wait-bg: #2a2a3e;
  --icon-bg: #3a2f2d;
  --icon-border: #5a4a45;
  --card-blob-color: rgba(240, 123, 98, 0.15);
  --noise-opacity: 0.1;
  --level-chip-bg: #33334a;
  --words-group-bg: #2e2e42;
  --modal-content-bg: #2a2a3e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Space Grotesk', 'Fira Sans', sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fcefd9, var(--bg) 60%),
    radial-gradient(circle at 20% 70%, #dfe9f7, transparent 65%),
    linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
  min-height: 100vh;
  overflow-x: hidden;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
}

input,
textarea {
  -webkit-user-select: text;
  user-select: text;
}

.bg-noise {
  position: fixed;
  inset: 0;
  background-image: radial-gradient(#0000000f 1px, transparent 1px);
  background-size: 18px 18px;
  mix-blend-mode: multiply;
  opacity: var(--noise-opacity);
  pointer-events: none;
}

[data-theme="dark"] body {
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
}

.app {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 64px;
  display: grid;
  gap: 32px;
}

.app-header {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  align-items: flex-start;
}

.eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 12px;
}

.subtitle {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0;
  font-family: 'Source Serif 4', Georgia, serif;
}

.header-actions {
  display: flex;
  gap: 12px;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
}

.panel-text {
  color: var(--muted);
  margin-top: 0;
}

.start-controls {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
}

.input-group {
  display: grid;
  gap: 8px;
  min-width: 220px;
}

input[type='number'],
input[type='text'] {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  background: var(--bg-surface);
  color: var(--ink);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition-fast) ease, box-shadow var(--transition-fast) ease;
}

input::placeholder {
  color: var(--muted);
  opacity: 0.6;
}

.hint {
  font-size: 0.85rem;
  color: var(--muted);
}

.panel-note {
  margin-top: 16px;
  color: var(--danger);
  font-size: 0.9rem;
}

.stats {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  margin-bottom: 20px;
}

.stat {
  padding: 12px 14px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: box-shadow var(--transition-fast) ease, transform var(--transition-fast) ease;
}

.stat:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.stat span {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat strong {
  font-size: 1.5rem;
}

.card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  display: grid;
  gap: 18px;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: auto auto -30% -10%;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, color-mix(in srgb, var(--success) 15%, transparent), transparent 70%);
  pointer-events: none;
}

.card::after {
  content: '';
  position: absolute;
  inset: -40% -10% auto auto;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, var(--card-blob-color), transparent 70%);
  pointer-events: none;
}

.card-top {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  z-index: 1;
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
}

.badge {
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
}

.chip {
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  background: var(--chip);
  font-size: 0.85rem;
  text-transform: lowercase;
}

.icon {
  margin-left: auto;
  background: var(--icon-bg);
  border: 1px solid var(--icon-border);
  border-radius: 10px;
  padding: 6px 10px;
  cursor: pointer;
}

.prompt {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 600;
  z-index: 1;
}

.prompt-meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.answer-form {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr) auto;
}

.feedback {
  min-height: 24px;
  font-weight: 600;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  padding: 0;
  border-radius: var(--radius-md);
  transition: padding var(--transition-fast) ease, background var(--transition-fast) ease;
}

.feedback.success {
  color: var(--success);
  background: var(--success-bg);
  padding: var(--space-md) var(--space-base);
}

.feedback.error {
  color: var(--danger);
  background: var(--danger-bg);
  padding: var(--space-md) var(--space-base);
}

.feedback:empty {
  padding: 0;
  background: transparent;
}

.feedback-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.typo-btn {
  margin-left: auto;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--danger);
  background: transparent;
  border: 1px solid currentColor;
  border-radius: 999px;
  white-space: nowrap;
  transition: background var(--transition-fast) ease,
    transform var(--transition-fast) ease;
}

.typo-btn:hover {
  background: var(--danger-surface);
}

.card-actions {
  display: flex;
  gap: 12px;
}

button {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
}

.primary {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 12px 18px;
  border-radius: 14px;
  box-shadow: 0 10px 20px var(--accent-glow);
  transition: background var(--transition-fast) ease,
    box-shadow var(--transition-fast) ease,
    transform var(--transition-fast) ease;
}

.primary:hover {
  box-shadow: 0 12px 24px var(--accent-glow);
}

.ghost {
  background: transparent;
  color: var(--ink);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: background var(--transition-fast) ease,
    border-color var(--transition-fast) ease,
    transform var(--transition-fast) ease;
}

.danger {
  background: var(--danger-surface);
  color: var(--danger);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--danger-border);
}

.wait {
  margin-top: 18px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
  background: var(--wait-bg);
}

.wait-countdown {
  font-weight: 600;
  color: var(--muted);
}

.theme-toggle {
  position: relative;
  width: 40px;
  height: 40px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.theme-icon {
  position: absolute;
  font-size: 1.2rem;
  transition: transform var(--transition-base) ease, opacity var(--transition-base) ease;
}

.theme-icon-light {
  opacity: 1;
  transform: rotate(0deg);
}

.theme-icon-dark {
  opacity: 0;
  transform: rotate(-90deg);
}

[data-theme="dark"] .theme-icon-light {
  opacity: 0;
  transform: rotate(90deg);
}

[data-theme="dark"] .theme-icon-dark {
  opacity: 1;
  transform: rotate(0deg);
}

.hidden {
  display: none !important;
}

.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 20;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: var(--modal-backdrop);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  z-index: 1;
  width: min(960px, 92vw);
  max-height: 85vh;
  overflow: hidden;
  display: grid;
  gap: 16px;
  background: var(--modal-content-bg);
  border-radius: 26px;
  border: 1px solid var(--border);
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.words-list {
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  overflow: auto;
  max-height: 50vh;
}

.words-levels {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.level-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  border: 1px solid var(--border);
  background: var(--level-chip-bg);
}

.words-row {
  display: grid;
  grid-template-columns: minmax(160px, 1.2fr) minmax(160px, 1.2fr) 120px 160px;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  align-items: center;
}

.words-row:last-child {
  border-bottom: none;
}

.words-head {
  background: var(--level-chip-bg);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  position: sticky;
  top: 0;
  z-index: 1;
}

.words-group {
  grid-template-columns: 1fr;
  background: var(--words-group-bg);
  font-weight: 600;
  color: var(--muted);
}

.words-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  background: var(--chip);
}

.words-pill.mastered {
  background: var(--success-bg);
  color: var(--success);
}

.words-pill.pending {
  background: var(--danger-bg);
  color: var(--danger);
}


/* === Phase 4: UX Quiz === */

/* Progress bar */
.progress-bar-container {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-base);
}

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

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: var(--radius-pill);
  transition: width var(--transition-base) ease;
}

.progress-label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
  white-space: nowrap;
}

/* Streak badge */
.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
}

.streak-icon {
  font-size: 0.9rem;
}

@keyframes streak-bump {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.streak-bump {
  animation: streak-bump var(--transition-base) ease;
}

/* Confetti */
.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 30;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  top: -10px;
  animation: confetti-fall 3s ease-out forwards;
}

@keyframes confetti-fall {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

/* === Phase 2: Animations & Transitions === */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Screen transitions */
@keyframes panel-enter {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes panel-exit {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-8px);
  }
}

.panel-enter {
  animation: panel-enter var(--transition-base) ease forwards;
}

.panel-exit {
  animation: panel-exit var(--transition-fast) ease forwards;
}

/* Feedback animation */
@keyframes feedback-slide-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.feedback-enter {
  animation: feedback-slide-in var(--transition-base) ease forwards;
}

/* Button hover & active states */
button:active {
  transform: scale(0.97);
}

.ghost:hover {
  background: var(--ghost-hover);
  border-color: color-mix(in srgb, var(--border), var(--ink) 15%);
}

.ghost:active {
  background: color-mix(in srgb, var(--ghost-hover), var(--ink) 5%);
}

.danger {
  transition: background var(--transition-fast) ease,
    border-color var(--transition-fast) ease,
    transform var(--transition-fast) ease;
}

.danger:hover {
  background: var(--danger-bg);
  border-color: var(--danger);
}

.primary:active {
  box-shadow: 0 4px 12px var(--accent-glow);
  transform: scale(0.97);
}

/* Focus ring */
input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  outline: none;
}

/* Modal animation */
.modal {
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base) ease;
}

.modal.modal-visible {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  transform: translateY(16px) scale(0.98);
  transition: transform var(--transition-base) ease;
}

.modal.modal-visible .modal-content {
  transform: translateY(0) scale(1);
}

/* === Phase 5: Niveaux & mots deja connus === */

/* Selecteur de niveau */
.level-group {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  background: var(--bg-surface);
}

.level-btn {
  flex: 1;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background var(--transition-fast) ease,
    color var(--transition-fast) ease;
}

.level-btn:hover {
  background: var(--ghost-hover);
  color: var(--ink);
}

.level-btn.is-active {
  background: var(--accent);
  color: #fff;
}

.level-btn.is-active:hover {
  background: var(--accent-dark);
  color: #fff;
}

/* Mots deja connus */
.known-section {
  margin-top: var(--space-lg);
  padding-top: var(--space-base);
  border-top: 1px solid var(--border);
  display: grid;
  gap: var(--space-md);
}

.known-header {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: flex-start;
  justify-content: space-between;
}

.known-title {
  margin: 0 0 var(--space-xs);
  font-size: 1.05rem;
}

.known-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.known-section .words-list {
  max-height: 34vh;
}

.known-row {
  grid-template-columns: minmax(140px, 1.2fr) minmax(140px, 1.2fr) 140px;
}

.known-restore {
  padding: 6px 12px;
  font-size: 0.85rem;
}

/* Voix espagnole */
.voice-hint {
  display: block;
  margin-top: var(--space-md);
}

.voice-help {
  margin-top: var(--space-sm);
  font-size: 0.9rem;
}

.voice-help summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent);
}

.voice-help-body {
  display: grid;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.voice-list {
  margin: 0;
  padding-left: 1.2em;
  display: grid;
  gap: 2px;
  max-height: 160px;
  overflow: auto;
}

.voice-list li {
  font-size: 0.85rem;
}

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

/* Synchronisation */
.sync-panel {
  margin-top: var(--space-lg);
  padding-top: var(--space-base);
  border-top: 1px solid var(--border);
  display: grid;
  gap: var(--space-md);
}

.sync-title {
  margin: 0;
  font-size: 1.05rem;
}

.sync-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

.sync-join {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.sync-join input {
  width: 15ch;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sync-code-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
  margin: 0;
}

.sync-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--chip);
  user-select: all;
}

@media (max-width: 640px) {
  .header-actions {
    flex-wrap: wrap;
  }

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

  .card-actions {
    flex-direction: column;
  }

  .icon {
    margin-left: 0;
  }

  .words-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .words-head {
    display: none;
  }

  .level-group {
    width: 100%;
  }

  .known-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .known-header {
    flex-direction: column;
  }

  .progress-bar-container {
    flex-wrap: wrap;
  }

  .streak-badge {
    margin-left: 0;
  }
}