/* ========================================
   PhraseForge - Styles
   Bright & colorful, mobile-first, WCAG AA
   ======================================== */

/* --- Reset & Base --- */

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

:root {
  /* Colors */
  --color-bg: #faf9ff;
  --color-text: #1a1a2e;
  --color-text-muted: #4b5563;
  --color-primary: #5b21b6;
  --color-primary-hover: #4c1d95;
  --color-primary-light: #ede9fe;
  --color-success: #15803d;
  --color-success-hover: #166534;
  --color-success-light: #dcfce7;
  --color-danger: #b91c1c;
  --color-danger-hover: #991b1b;
  --color-danger-light: #fee2e2;
  --color-french: #2563eb;
  --color-french-hover: #1d4ed8;
  --color-german: #dc2626;
  --color-german-hover: #b91c1c;
  --color-spanish: #d97706;
  --color-spanish-hover: #b45309;
  --color-level: #7c3aed;
  --color-level-hover: #6d28d9;
  --color-white: #ffffff;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;

  /* Typography */
  --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --line-height: 1.6;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Borders */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 4px 20px rgba(91, 33, 182, 0.1);

  /* Focus */
  --focus-ring: 0 0 0 3px rgba(91, 33, 182, 0.5);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background: linear-gradient(135deg, #fff7ed 0%, #ede9fe 50%, #ecfdf5 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

/* --- Screen Reader Only --- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Focus Styles --- */

*:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* --- Screen Management --- */

.screen {
  display: none;
  flex-direction: column;
  min-height: 100vh;
}

.screen.active {
  display: flex;
}

.screen-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

/* --- Typography --- */

h1 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

.subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.gradient-text {
  font-size: var(--font-size-3xl);
  background: linear-gradient(135deg, var(--color-french), var(--color-primary), var(--color-danger));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--color-primary); /* fallback */
}

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: var(--space-sm) var(--space-lg);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-large {
  min-height: 52px;
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

.btn-small {
  min-height: 36px;
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
}

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

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 4px 14px rgba(91, 33, 182, 0.3);
}

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

.btn-success:hover {
  background-color: var(--color-success-hover);
  box-shadow: 0 4px 14px rgba(21, 128, 61, 0.3);
}

.btn-danger {
  background-color: var(--color-danger);
  color: var(--color-white);
}

.btn-danger:hover {
  background-color: var(--color-danger-hover);
  box-shadow: 0 4px 14px rgba(185, 28, 28, 0.3);
}

.btn-secondary {
  background-color: var(--color-gray-100);
  color: var(--color-text);
  border-color: var(--color-gray-300);
}

.btn-secondary:hover {
  background-color: var(--color-gray-200);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

.btn-text {
  background: none;
  color: var(--color-gray-500);
  border: none;
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.btn-back {
  align-self: flex-start;
  background: none;
  color: var(--color-primary);
  border: none;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

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

/* --- Welcome Screen --- */

.welcome-decoration {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.deco-emoji {
  font-size: 2.5rem;
}

#welcome-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
  max-width: 360px;
  margin-top: var(--space-md);
}

#welcome-form label {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

#welcome-form input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  text-align: center;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

#welcome-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

#welcome-form input::placeholder {
  color: var(--color-gray-500);
}

#welcome-form .btn {
  width: 100%;
}

/* --- Card Grid --- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-md);
  width: 100%;
  max-width: 560px;
  margin-top: var(--space-md);
}

.card-grid-4 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 400px;
}

/* --- Cards --- */

.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-xl) var(--space-md);
  border: 3px solid transparent;
  border-radius: var(--radius-xl);
  cursor: pointer;
  font-family: var(--font-family);
  text-align: center;
  transition: transform var(--transition-normal),
              box-shadow var(--transition-normal);
  min-height: 130px;
}

.card:hover {
  transform: translateY(-4px);
}

.card:active {
  transform: translateY(-1px);
}

.card-emoji {
  font-size: 2.5rem;
  line-height: 1;
}

.card .card-label {
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.card .card-desc {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

/* Language cards */
.card-french {
  background-color: var(--color-french);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.card-french:hover {
  background-color: var(--color-french-hover);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.35);
}

.card-german {
  background-color: var(--color-german);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(220, 38, 38, 0.25);
}

.card-german:hover {
  background-color: var(--color-german-hover);
  box-shadow: 0 8px 25px rgba(220, 38, 38, 0.35);
}

.card-spanish {
  background-color: var(--color-spanish);
  color: var(--color-text);
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.25);
}

.card-spanish:hover {
  background-color: var(--color-spanish-hover);
  box-shadow: 0 8px 25px rgba(217, 119, 6, 0.35);
}

/* Mode cards */
.card-grid-2 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 400px;
}

.card-mode {
  min-height: 160px;
}

.card-mode-sentences {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.card-mode-sentences:hover {
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.35);
}

.card-mode-vocab {
  background: linear-gradient(135deg, #059669, #0d9488);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.25);
}

.card-mode-vocab:hover {
  box-shadow: 0 8px 25px rgba(5, 150, 105, 0.35);
}

/* Vocab flashcard styling */
.vocab-word {
  font-size: var(--font-size-3xl);
  font-weight: 800;
}

/* Level cards */
.card-level {
  background-color: var(--color-level);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.25);
}

.card-level:hover {
  background-color: var(--color-level-hover);
  box-shadow: 0 8px 25px rgba(124, 58, 237, 0.35);
}

.card-level .card-label {
  font-size: var(--font-size-2xl);
  font-weight: 800;
}

/* --- Practice Screen --- */

.practice-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: 10;
}

.score-display {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 600;
}

.score-numbers {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
}

.score-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.practice-content {
  justify-content: flex-start;
  padding-top: var(--space-xl);
}

.practice-badge {
  display: inline-flex;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

/* Progress */
.progress-bar {
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  width: 100%;
  max-width: 500px;
  margin-bottom: var(--space-xs);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-level));
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
  width: 0%;
}

.progress-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

/* Sentence Card */
.sentence-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-xl);
  box-shadow: var(--shadow-card);
  width: 100%;
  max-width: 560px;
  margin-bottom: var(--space-xl);
  text-align: center;
}

.sentence-text {
  font-size: var(--font-size-xl);
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-text);
}

.divider {
  border: none;
  border-top: 2px dashed var(--color-gray-300);
  margin: var(--space-lg) 0;
}

.translation-text {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  font-style: italic;
  line-height: 1.5;
}

/* Action Buttons */
.action-buttons {
  width: 100%;
  max-width: 500px;
}

#reveal-group {
  display: flex;
  justify-content: center;
}

#reveal-group .btn {
  width: 100%;
  max-width: 320px;
}

/* Time indicator */
.time-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.time-indicator.speed-lightning {
  background: #dcfce7;
  color: #15803d;
}

.time-indicator.speed-quick {
  background: #dbeafe;
  color: #1d4ed8;
}

.time-indicator.speed-steady {
  background: #fef3c7;
  color: #b45309;
}

.time-indicator.speed-careful {
  background: #ede9fe;
  color: #5b21b6;
}

.modal-time {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.answer-prompt {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-md);
  text-align: center;
}

.answer-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

.answer-buttons .btn {
  flex: 1;
  max-width: 200px;
}

/* Practice Footer */
.practice-footer {
  display: flex;
  justify-content: center;
  padding: var(--space-md);
}

/* --- Score Summary (Language Screen) --- */

.score-summary {
  width: 100%;
  max-width: 560px;
  margin-top: var(--space-2xl);
  text-align: center;
}

.score-summary-heading {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.score-summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.score-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-sm) var(--space-xs);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary);
}

.score-chip-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

.score-chip-value {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-primary);
}

.score-chip-time {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  font-weight: 600;
}

/* --- Scores Modal (Full Breakdown) --- */

.modal-content-wide {
  max-width: 560px;
}

.scores-table-wrap {
  margin-bottom: var(--space-lg);
}

.scores-lang-group {
  margin-bottom: var(--space-lg);
}

.scores-lang-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  text-align: left;
}

.scores-mode-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
  margin-top: var(--space-sm);
  text-align: left;
}

.scores-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  text-align: left;
}

.scores-table th {
  padding: var(--space-xs) var(--space-sm);
  border-bottom: 2px solid var(--color-gray-300);
  font-weight: 700;
  color: var(--color-text-muted);
}

.scores-table td {
  padding: var(--space-xs) var(--space-sm);
  border-bottom: 1px solid var(--color-gray-200);
}

.scores-table .score-pct {
  font-weight: 700;
  color: var(--color-primary);
}

.scores-empty {
  color: var(--color-text-muted);
  font-style: italic;
  padding: var(--space-md) 0;
}

.modal-overall {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
}

/* --- Modals --- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 46, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: var(--space-md);
}

.modal-overlay[hidden] {
  display: none;
}

.modal-content {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.modal-emoji {
  font-size: 3rem;
  margin-bottom: var(--space-md);
}

.modal-score {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xl);
}

.modal-content p {
  margin-bottom: var(--space-lg);
  color: var(--color-text-muted);
  line-height: var(--line-height);
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.modal-actions .btn {
  width: 100%;
}

/* --- Responsive --- */

@media (min-width: 600px) {
  h1 {
    font-size: var(--font-size-3xl);
  }

  .gradient-text {
    font-size: 3.5rem;
  }

  .card {
    min-height: 160px;
    padding: var(--space-2xl) var(--space-xl);
  }

  .card-emoji {
    font-size: 3rem;
  }

  .card-grid {
    gap: var(--space-lg);
  }

  .card-grid-4 {
    grid-template-columns: repeat(4, 1fr);
    max-width: 600px;
  }

  .sentence-text {
    font-size: var(--font-size-2xl);
  }

  .sentence-card {
    padding: var(--space-2xl) var(--space-2xl);
  }

  .modal-actions {
    flex-direction: row;
  }

  .deco-emoji {
    font-size: 3rem;
  }

  .consent-actions {
    flex-direction: row;
    justify-content: center;
  }
}

@media (min-width: 900px) {
  .practice-header {
    padding: var(--space-md) var(--space-xl);
  }
}

/* --- Welcome Footer Links --- */

.welcome-footer-links {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.about-link {
  margin-top: var(--space-lg);
}

.language-footer-links {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

/* --- Consent Banner --- */

.consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--color-white);
  border-top: 2px solid var(--color-primary-light);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
  padding: var(--space-xl) var(--space-md);
}

.consent-banner[hidden] {
  display: none;
}

.consent-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.consent-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.consent-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  line-height: var(--line-height);
}

.consent-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* --- About Screen --- */

.about-content {
  text-align: left;
  justify-content: flex-start;
  padding-top: var(--space-xl);
  padding-bottom: var(--space-2xl);
}

.about-content h1 {
  text-align: center;
  align-self: center;
}

.about-section {
  width: 100%;
  margin-bottom: var(--space-xl);
}

.about-section h2 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.about-section p {
  color: var(--color-text-muted);
  line-height: var(--line-height);
}

.about-steps,
.about-list {
  padding-left: var(--space-lg);
  color: var(--color-text-muted);
  line-height: 1.8;
}

.about-steps li,
.about-list li {
  margin-bottom: var(--space-xs);
}

.about-levels {
  display: grid;
  gap: var(--space-sm);
}

.level-item {
  display: flex;
  gap: var(--space-md);
  align-items: baseline;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.level-item dt {
  font-weight: 800;
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  min-width: 2rem;
}

.level-item dd {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* --- Content Breakdown (About) --- */

.content-lang-group {
  margin-bottom: var(--space-lg);
}

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

.site-footer {
  text-align: center;
  padding: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  border-top: 1px solid var(--color-gray-200);
}

.footer-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-link:hover {
  color: var(--color-primary-hover);
}

/* --- Privacy Policy --- */

.privacy-date {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-xl);
  text-align: center;
  align-self: center;
}

/* --- Consent Link --- */

.consent-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.consent-link:hover {
  color: var(--color-primary-hover);
}

.about-inline-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.about-inline-link:hover {
  color: var(--color-primary-hover);
}

/* --- Reduced Motion --- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}