/* ============================================================
   beatha — Main Stylesheet
   Color scheme: forest green + gold on warm cream
   ============================================================ */

/* ---- Custom Properties ---- */
:root {
  --color-primary:        #2c5f2e;
  --color-primary-light:  #3d7a41;
  --color-primary-dark:   #1a3d1c;
  --color-accent:         #b8860b;
  --color-accent-light:   #d4a017;
  --color-bg:             #f7f4ef;
  --color-bg-card:        #ffffff;
  --color-bg-dark:        #ede8df;
  --color-text:           #1a1a1a;
  --color-text-muted:     #5a5a6a;
  --color-text-light:     #888899;

  --color-masc:           #1565c0;
  --color-masc-bg:        #e3f2fd;
  --color-fem:            #ad1457;
  --color-fem-bg:         #fce4ec;

  --color-known:          #2c5f2e;
  --color-known-bg:       #e8f5e9;
  --color-known-border:   #81c784;

  --color-correct:        #1b5e20;
  --color-correct-bg:     #e8f5e9;
  --color-incorrect:      #b71c1c;
  --color-incorrect-bg:   #ffebee;

  --color-locked:         #9e9e9e;
  --color-locked-bg:      #f5f5f5;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.10);
  --shadow-md:  0 2px 8px rgba(0,0,0,0.12);
  --shadow-lg:  0 4px 16px rgba(0,0,0,0.14);

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;

  --font-irish: Georgia, 'Times New Roman', serif;
  --font-body:  -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --max-width:  1100px;
  --nav-height: 64px;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--color-primary-light); }

h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; }
h2 { font-size: 1.4rem; color: var(--color-primary-dark); margin-bottom: 1rem; }
h3 { font-size: 1.1rem; color: var(--color-primary); margin-bottom: 0.5rem; }

p { margin-bottom: 0.75rem; }
p:last-child { margin-bottom: 0; }

kbd {
  background: #eee;
  border: 1px solid #ccc;
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 0.85em;
  font-family: var(--font-body);
}

/* ---- Navigation ---- */
.site-header {
  background: var(--color-primary-dark);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-irish {
  font-family: var(--font-irish);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent-light);
  letter-spacing: 0.03em;
}

.brand-english {
  font-size: 0.7rem;
  color: #aabba0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 0.25rem;
}

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  color: #c8d8c4;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}

.nav-link:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
  text-decoration: none;
}

.nav-link.active {
  background: rgba(255,255,255,0.15);
  color: var(--color-accent-light);
  font-weight: 600;
}

/* ---- Page Layout ---- */
.page-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.page-title {
  font-size: 1.75rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.25rem;
}

.page-subtitle {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

/* ---- Progress Section ---- */
.progress-section {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-bg-dark);
}

.progress-stats {
  display: flex;
  gap: 2rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}

.progress-bar {
  height: 8px;
  background: var(--color-bg-dark);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: 4px;
  transition: width 0.4s ease;
  min-width: 0;
}

/* ---- Section Headers ---- */
.section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  margin-top: 2rem;
}

.section-header h2 { margin-bottom: 0; }

.section-count {
  background: var(--color-bg-dark);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  padding: 0.2em 0.6em;
  border-radius: 99px;
  font-weight: 600;
}

/* ---- Word Grid ---- */
.word-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.empty-state {
  color: var(--color-text-muted);
  font-style: italic;
  padding: 1.5rem;
  text-align: center;
  border: 2px dashed var(--color-bg-dark);
  border-radius: var(--radius-md);
  grid-column: 1 / -1;
}

/* ---- Word Card ---- */
.word-card {
  background: var(--color-bg-card);
  border: 1px solid #e0dbd0;
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: box-shadow 0.2s, transform 0.15s, border-color 0.2s;
}

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

.word-card.known {
  border-color: var(--color-known-border);
  background: linear-gradient(135deg, #fff 80%, #f1faf1 100%);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.card-header-left {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  min-width: 0;
}

.irish-word {
  font-family: var(--font-irish);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.1;
}

.irish-inline {
  font-family: var(--font-irish);
  font-style: italic;
  color: var(--color-primary);
}

.gender-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2em 0.6em;
  border-radius: 99px;
  white-space: nowrap;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-masc {
  background: var(--color-masc-bg);
  color: var(--color-masc);
}

.badge-fem {
  background: var(--color-fem-bg);
  color: var(--color-fem);
}

.english-word {
  font-size: 1rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.card-grammar {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
  font-size: 0.85rem;
}

.grammar-item {
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
}

.grammar-label {
  color: var(--color-text-light);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
  min-width: 60px;
}

.grammar-value {
  color: var(--color-primary-dark);
  font-weight: 500;
}

.card-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  border-left: 3px solid var(--color-accent);
  padding-left: 0.6rem;
}

.card-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-audio-icon {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-primary-light);
  font-size: 0.7rem;
  padding: 0.2rem 0.35rem;
  border-radius: var(--radius-sm);
  line-height: 1;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.btn-audio-icon:hover { background: var(--color-bg-dark); color: var(--color-primary); }
.btn-audio-icon.playing { color: var(--color-accent); }
.btn-audio-icon.loading { opacity: 0.5; cursor: wait; }
.btn-audio-icon.audio-error { color: var(--color-text-light); cursor: default; }

/* ---- Card details (collapsible grammar) ---- */
.card-details {
  border-top: 1px solid var(--color-bg-dark);
  padding-top: 0.5rem;
  margin-top: 0.25rem;
}

.card-details summary {
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  user-select: none;
}

.card-details summary::-webkit-details-marker { display: none; }

.card-details summary::before {
  content: '▶';
  font-size: 0.55em;
  transition: transform 0.15s;
  color: var(--color-accent);
}

.card-details[open] summary::before { transform: rotate(90deg); }

.card-details .card-grammar {
  margin-top: 0.5rem;
}

.card-details .card-note {
  margin-top: 0.5rem;
}

/* ---- Buttons ---- */
.btn-audio,
.btn-known,
.btn-primary,
.btn-secondary {
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  font-family: var(--font-body);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.btn-audio {
  background: var(--color-bg);
  color: var(--color-primary);
  border: 1px solid #ccc;
  flex: 1;
  justify-content: center;
}

.btn-audio:hover { background: var(--color-bg-dark); }

.btn-audio.loading {
  opacity: 0.6;
  cursor: wait;
}

.btn-audio.playing {
  background: var(--color-primary-light);
  color: white;
  border-color: var(--color-primary-light);
}

.btn-audio.audio-error {
  color: var(--color-text-light);
  cursor: default;
}

.btn-known {
  background: var(--color-bg);
  color: var(--color-text-muted);
  border: 1px solid #ccc;
  width: 100%;
  justify-content: center;
  font-size: 0.82rem;
}

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

.btn-known.is-known {
  background: var(--color-known-bg);
  color: var(--color-known);
  border-color: var(--color-known-border);
  font-weight: 600;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  font-size: 1rem;
  padding: 0.6rem 1.5rem;
}

.btn-primary:hover { background: var(--color-primary-light); }
.btn-primary:active { transform: scale(0.97); }

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  font-size: 1rem;
  padding: 0.6rem 1.5rem;
}

.btn-secondary:hover { background: var(--color-known-bg); }

/* ---- Exercise Page ---- */
.exercise-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 768px) {
  .exercise-layout { grid-template-columns: 1fr; }
}

.exercise-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.meta-pill {
  background: var(--color-bg-dark);
  border-radius: 99px;
  padding: 0.25em 0.75em;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

.meta-pill.tier-1 { background: var(--color-known-bg); color: var(--color-known); }
.meta-pill.tier-2 { background: var(--color-masc-bg); color: var(--color-masc); }

.streak-display {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.streak-count {
  font-weight: 700;
  color: var(--color-accent);
  font-size: 1.1rem;
}

.exercise-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid #e0dbd0;
}

.exercise-prompt {
  margin-bottom: 1.5rem;
}

.prompt-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.irish-sentence {
  font-family: var(--font-irish);
  font-size: 1.8rem;
  color: var(--color-primary-dark);
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.sentence-audio-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-light);
  font-size: 0.9rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}

.sentence-audio-btn:hover {
  color: var(--color-primary);
  background: var(--color-bg);
}

.exercise-input-row {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

#answer-input {
  flex: 1;
  min-width: 200px;
  padding: 0.65rem 1rem;
  border: 2px solid #ddd;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s;
}

#answer-input:focus {
  outline: none;
  border-color: var(--color-primary-light);
  background: white;
}

#answer-input:disabled {
  background: var(--color-bg-dark);
  color: var(--color-text-muted);
}

/* ---- Feedback ---- */
.feedback {
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  min-height: 1.5em;
  transition: background 0.2s;
}

.feedback.correct {
  background: var(--color-correct-bg);
  color: var(--color-correct);
  border-left: 4px solid var(--color-correct);
}

.feedback.incorrect {
  background: var(--color-incorrect-bg);
  color: var(--color-incorrect);
  border-left: 4px solid var(--color-incorrect);
}

/* ---- Why / Grammar Explanation ---- */
.why-section {
  margin-top: 1rem;
  border-top: 1px solid var(--color-bg-dark);
  padding-top: 1rem;
}

.why-section details summary {
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.why-section details summary::before {
  content: '▶';
  font-size: 0.65em;
  transition: transform 0.2s;
}

.why-section details[open] summary::before { transform: rotate(90deg); }

.why-section details summary::-webkit-details-marker { display: none; }

.why-body {
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

#grammar-notes {
  color: var(--color-text);
  margin-bottom: 0.75rem;
  line-height: 1.6;
}

.rule-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.rule-link {
  display: inline-block;
  background: var(--color-bg);
  border: 1px solid #ccc;
  border-radius: 99px;
  padding: 0.2em 0.75em;
  font-size: 0.8rem;
  color: var(--color-primary);
  text-decoration: none;
  transition: background 0.15s;
}

.rule-link:hover {
  background: var(--color-known-bg);
  border-color: var(--color-known-border);
  text-decoration: none;
}

/* ---- Level-Up Banner ---- */
.level-up-banner {
  margin-top: 1.5rem;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: white;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
}

.level-up-banner h3 {
  font-size: 1.3rem;
  color: var(--color-accent-light);
  margin-bottom: 0.5rem;
}

.level-up-banner p {
  margin-bottom: 1rem;
  color: #c8d8c4;
}

/* ---- Exercise Sidebar ---- */
.exercise-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-card {
  background: var(--color-bg-card);
  border: 1px solid #e0dbd0;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.sidebar-card h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.tips-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tips-list li {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding-left: 1.2em;
  position: relative;
}

.tips-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary-light);
}

.resources-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.resource-item {
  font-size: 0.85rem;
}

.resource-item a {
  font-weight: 600;
  display: block;
}

.resource-item .resource-desc {
  color: var(--color-text-muted);
  font-size: 0.78rem;
  margin-top: 0.1rem;
}

/* ---- Grammar Page ---- */
.grammar-intro {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-accent);
}

.grammar-intro p { font-size: 0.95rem; color: var(--color-text-muted); }

.grammar-sections {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.grammar-rule {
  background: var(--color-bg-card);
  border: 1px solid #e0dbd0;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  scroll-margin-top: calc(var(--nav-height) + 1rem);
}

.grammar-rule h3 {
  font-size: 1.1rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
  padding-right: 80px;
}

.grammar-rule .rule-body {
  font-size: 0.95rem;
  color: var(--color-text);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.phase-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2em 0.6em;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.phase-badge.phase-1 {
  background: var(--color-known-bg);
  color: var(--color-known);
}

.phase-badge.phase-2 {
  background: var(--color-masc-bg);
  color: var(--color-masc);
}

.grammar-rule.locked {
  opacity: 0.6;
}

.lock-overlay {
  position: absolute;
  inset: 0;
  background: rgba(247,244,239,0.7);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
}

.lock-message {
  background: white;
  border: 1px solid #ddd;
  border-radius: var(--radius-sm);
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* Grammar examples table */
.grammar-examples {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.grammar-example {
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  font-size: 0.9rem;
  align-items: baseline;
}

@media (max-width: 520px) {
  .grammar-example { grid-template-columns: 1fr; }
}

.example-irish {
  font-family: var(--font-irish);
  font-size: 1rem;
  color: var(--color-primary-dark);
  font-weight: 600;
}

.example-english {
  color: var(--color-text-muted);
}

.example-note {
  grid-column: 1 / -1;
  font-size: 0.78rem;
  color: var(--color-accent);
  font-style: italic;
}

/* Lenition table */
.mutation-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

.mutation-table th {
  background: var(--color-primary-dark);
  color: white;
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mutation-table td {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--color-bg-dark);
  font-family: var(--font-irish);
}

.mutation-table tr:nth-child(even) td {
  background: var(--color-bg);
}

.mutation-table .col-orig { color: var(--color-text); }
.mutation-table .col-result { color: var(--color-primary); font-weight: 600; }
.mutation-table .col-example { font-style: italic; color: var(--color-text-muted); font-family: var(--font-body); }

/* ---- Dialect note ---- */
.dialect-note {
  background: #fffbea;
  border: 1px solid #ffe082;
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  font-size: 0.82rem;
  color: #5d4037;
  margin-top: 1rem;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-primary-dark);
  color: #8da886;
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  margin-top: 4rem;
}

.site-footer a { color: var(--color-accent-light); }

/* ---- Responsive ---- */
@media (max-width: 600px) {
  .nav-inner { padding: 0 1rem; }
  .page-main { padding: 1.25rem 1rem 3rem; }
  .word-grid { grid-template-columns: 1fr; }
  .irish-sentence { font-size: 1.4rem; }
  .exercise-card { padding: 1.25rem; }
  .progress-stats { gap: 1rem; }
  .nav-link { padding: 0.5rem 0.6rem; font-size: 0.88rem; }
  .brand-irish { font-size: 1.15rem; }
}