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

:root {
  --green-dark: #1a3a0a;
  --green-primary: #2d5016;
  --green-mid: #4a7c28;
  --green-light: #6ba33e;
  --green-pale: #e8f5e0;
  --cream: #faf8f0;
  --white: #ffffff;
  --text: #1a1a1a;
  --text-light: #555;
  --text-muted: #888;
  --border: #ddd;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: var(--cream);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ===== Nav ===== */
nav {
  background: var(--green-primary);
  color: white;
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.nav-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-brand {
  font-size: 1.2rem;
  font-weight: 700;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
}

.nav-btn {
  background: transparent;
  color: rgba(255,255,255,0.7);
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-btn:hover { background: rgba(255,255,255,0.1); color: white; }
.nav-btn.active { background: rgba(255,255,255,0.2); color: white; }

.nav-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

#nav-username {
  opacity: 0.8;
}

.btn-small {
  background: rgba(255,255,255,0.15);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 4px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}
.btn-small:hover { background: rgba(255,255,255,0.25); }

/* ===== Auth ===== */
.auth-container {
  max-width: 420px;
  margin: 60px auto;
  padding: 0 20px;
}

.auth-header {
  text-align: center;
  margin-bottom: 32px;
}

.auth-logo {
  font-size: 4rem;
  margin-bottom: 12px;
}

.auth-header h1 {
  font-size: 1.8rem;
  color: var(--green-primary);
  margin-bottom: 8px;
}

.auth-header p {
  color: var(--text-light);
  font-style: italic;
}

.auth-subtitle {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.user-select {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 16px;
}

.user-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 28px 40px;
  background: white;
  border: 3px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow);
}

.user-btn:hover {
  border-color: var(--green-mid);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.user-avatar {
  font-size: 3.5rem;
}

.user-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--green-dark);
}

.auth-form {
  background: white;
  padding: 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-light);
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--green-mid);
}

.btn-primary {
  width: 100%;
  padding: 14px;
  background: var(--green-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-primary:hover { background: var(--green-mid); }

.btn-secondary {
  padding: 10px 20px;
  background: white;
  color: var(--green-primary);
  border: 2px solid var(--green-primary);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-secondary:hover { background: var(--green-pale); }

.error-msg {
  margin-top: 14px;
  padding: 10px;
  background: #fee;
  color: #c33;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  text-align: center;
}

/* ===== Learn Page ===== */
.learn-container {
  max-width: 600px;
  margin: 30px auto;
  padding: 0 20px;
}

.word-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.word-card-inner {
  padding: 32px;
}

.word-type-badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--green-pale);
  color: var(--green-primary);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.word-type-badge.review {
  background: #fff3e0;
  color: #e65100;
}

.word-category {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.word-maori {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--green-dark);
  margin-bottom: 4px;
  line-height: 1.2;
}

.word-english {
  font-size: 1.3rem;
  color: var(--text-light);
  margin-bottom: 20px;
}

.word-pronunciation {
  background: var(--green-pale);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.pronunciation-label {
  font-weight: 600;
  color: var(--green-primary);
  white-space: nowrap;
}

.pronunciation-text {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--green-dark);
}

.speak-btn {
  background: var(--green-primary);
  color: white;
  border: none;
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

.speak-btn:hover {
  background: var(--green-dark);
}

.speak-btn:active {
  transform: scale(0.95);
}

.speak-btn-sm {
  padding: 3px 10px;
  font-size: 0.75rem;
  margin-left: 6px;
}

.word-section {
  margin-bottom: 20px;
}

.word-section h3 {
  font-size: 0.9rem;
  color: var(--green-mid);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.word-section p {
  color: var(--text);
  line-height: 1.7;
}

.example-section {
  background: #f8f6f0;
  padding: 18px;
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--green-mid);
}

.example-maori {
  font-style: italic;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--green-dark);
  margin-bottom: 6px !important;
}

.example-english {
  color: var(--text-light) !important;
}

.confidence-section {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 2px solid var(--green-pale);
}

.confidence-section h3 {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-bottom: 14px;
  text-align: center;
}

.confidence-buttons {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

.confidence-btn {
  flex: 1;
  min-width: 60px;
  padding: 12px 8px;
  background: white;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.3rem;
  text-align: center;
  transition: all 0.2s;
}

.confidence-btn:hover {
  border-color: var(--green-mid);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.confidence-btn small {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.no-words {
  text-align: center;
  padding: 60px 20px;
}

.completion-icon {
  font-size: 4rem;
  margin-bottom: 16px;
}

.no-words h2 {
  color: var(--green-primary);
  margin-bottom: 12px;
}

.no-words p {
  color: var(--text-light);
  margin-bottom: 8px;
}

.no-words .btn-primary {
  width: auto;
  margin-top: 20px;
  padding: 12px 32px;
}

/* ===== Progress Page ===== */
.progress-container {
  max-width: 700px;
  margin: 30px auto;
  padding: 0 20px;
}

.progress-container h2 {
  color: var(--green-primary);
  margin-bottom: 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

.stat-card {
  background: white;
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--green-primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.progress-bar-container {
  margin-bottom: 32px;
}

.progress-bar {
  height: 12px;
  background: var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green-mid), var(--green-light));
  border-radius: 6px;
  transition: width 0.5s ease;
  width: 0%;
}

.progress-text {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 8px;
}

.progress-container h3 {
  color: var(--text-light);
  margin-bottom: 16px;
}

.learned-words-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.learned-word-item {
  background: white;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.learned-word-info h4 {
  color: var(--green-dark);
  font-size: 1.1rem;
}

.learned-word-info p {
  color: var(--text-light);
  font-size: 0.9rem;
}

.learned-word-confidence {
  font-size: 1.5rem;
}

/* ===== Browse Page ===== */
.browse-container {
  max-width: 700px;
  margin: 30px auto;
  padding: 0 20px;
}

.browse-container h2 {
  color: var(--green-primary);
  margin-bottom: 20px;
}

.category-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.category-btn {
  padding: 6px 16px;
  border: 2px solid var(--border);
  background: white;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.category-btn:hover, .category-btn.active {
  border-color: var(--green-mid);
  background: var(--green-pale);
  color: var(--green-primary);
}

.browse-words-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.browse-word-item {
  background: white;
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: all 0.2s;
}

.browse-word-item:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.browse-word-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
}

.browse-word-header h4 {
  color: var(--green-dark);
  font-size: 1.15rem;
}

.browse-word-header span {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.browse-word-item p {
  color: var(--text-light);
  font-size: 0.9rem;
}

.browse-word-detail {
  display: none;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.browse-word-item.expanded .browse-word-detail {
  display: block;
}

.browse-word-detail .pronunciation {
  background: var(--green-pale);
  padding: 8px 14px;
  border-radius: 6px;
  margin-bottom: 10px;
  font-style: italic;
  color: var(--green-dark);
}

.browse-word-detail .explanation {
  margin-bottom: 10px;
  line-height: 1.6;
}

.browse-word-detail .example {
  background: #f8f6f0;
  padding: 12px 14px;
  border-radius: 6px;
  border-left: 3px solid var(--green-mid);
}

.browse-word-detail .example .maori-text {
  font-style: italic;
  font-weight: 600;
  color: var(--green-dark);
}

.browse-word-detail .example .english-text {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ===== Settings Page ===== */
.settings-container {
  max-width: 600px;
  margin: 30px auto;
  padding: 0 20px;
}

.settings-container h2 {
  color: var(--green-primary);
  margin-bottom: 24px;
}

.setting-item {
  background: white;
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.setting-info h3 {
  color: var(--text);
  margin-bottom: 4px;
}

.setting-info p {
  color: var(--text-light);
  font-size: 0.9rem;
}

.setting-note {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== iOS Install Banner ===== */
.ios-banner {
  background: linear-gradient(135deg, #fff3e0, #fff8e1) !important;
  border: 2px solid #ffcc80;
  flex-direction: column;
  align-items: flex-start !important;
}

.ios-steps {
  margin-top: 12px;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--text);
  line-height: 2;
}

.ios-steps li {
  margin-bottom: 4px;
}

.ios-steps strong {
  color: var(--green-primary);
}

.ios-icon {
  font-size: 1.1rem;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .nav-inner {
    justify-content: center;
  }

  .nav-brand {
    width: 100%;
    text-align: center;
  }

  .nav-links {
    justify-content: center;
  }

  .nav-user {
    width: 100%;
    justify-content: center;
  }

  .word-maori {
    font-size: 1.8rem;
  }

  .word-card-inner {
    padding: 20px;
  }

  .confidence-btn {
    min-width: 50px;
    padding: 10px 4px;
    font-size: 1.1rem;
  }

  .auth-container {
    margin: 30px auto;
  }

  .setting-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== Loading animation ===== */
.loading {
  display: flex;
  justify-content: center;
  padding: 40px;
}

.loading::after {
  content: '';
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--green-mid);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ===== Toast notification ===== */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--green-dark);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transition: transform 0.3s ease;
  font-size: 0.95rem;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* ===== PIN Input ===== */
.pin-section {
  margin-top: 24px;
  text-align: center;
}

.pin-prompt {
  margin-bottom: 16px;
  font-size: 1.1rem;
  color: var(--text-light);
}

.pin-input-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 12px;
}

.pin-input {
  width: 140px;
  padding: 14px;
  font-size: 1.8rem;
  text-align: center;
  letter-spacing: 12px;
  border: 3px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s;
  font-family: inherit;
}
.pin-input:focus {
  outline: none;
  border-color: var(--green-mid);
}

.pin-submit {
  width: auto;
  padding: 14px 28px;
  font-size: 1.1rem;
}

.btn-link {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 8px;
  transition: color 0.2s;
}
.btn-link:hover {
  color: var(--green-primary);
}

.user-btn.selected {
  border-color: var(--green-mid);
  background: var(--green-pale);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ===== Level Card ===== */
.level-card {
  background: linear-gradient(135deg, var(--green-primary), var(--green-mid));
  color: white;
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.level-badge {
  font-size: 3rem;
  flex-shrink: 0;
}

.level-info {
  flex: 1;
  min-width: 150px;
}

.level-info h3 {
  font-size: 1.4rem;
  margin-bottom: 2px;
}

.level-info p {
  opacity: 0.85;
  font-size: 0.9rem;
}

.level-xp {
  width: 100%;
}

.xp-bar {
  height: 10px;
  background: rgba(255,255,255,0.25);
  border-radius: 5px;
  overflow: hidden;
}

.xp-fill {
  height: 100%;
  background: rgba(255,255,255,0.9);
  border-radius: 5px;
  transition: width 0.5s ease;
  width: 0%;
}

.xp-text {
  display: block;
  text-align: center;
  font-size: 0.85rem;
  margin-top: 6px;
  opacity: 0.85;
}

/* ===== Section Cards ===== */
.section-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 24px;
}

.section-card h3 {
  color: var(--green-primary);
  margin-bottom: 16px;
  font-size: 1.1rem;
}

/* ===== Difficulty Bars ===== */
.difficulty-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.diff-label {
  width: 140px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
  flex-shrink: 0;
}

.diff-bar {
  flex: 1;
  height: 10px;
  background: var(--border);
  border-radius: 5px;
  overflow: hidden;
}

.diff-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.5s ease;
  width: 0%;
}

.diff-1 { background: var(--green-light); }
.diff-2 { background: #f0ad4e; }
.diff-3 { background: #d9534f; }

.diff-count {
  font-size: 0.85rem;
  color: var(--text-muted);
  width: 50px;
  text-align: right;
  flex-shrink: 0;
}

/* ===== Goals ===== */
.goals-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.goal-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  background: var(--cream);
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  transition: all 0.2s;
}

.goal-item.goal-done {
  background: var(--green-pale);
  border-color: var(--green-light);
}

.goal-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.goal-info {
  flex: 1;
  min-width: 0;
}

.goal-title {
  font-weight: 700;
  color: var(--text);
  font-size: 0.95rem;
}

.goal-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.goal-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.goal-fill {
  height: 100%;
  background: var(--green-mid);
  border-radius: 3px;
  transition: width 0.5s ease;
}

.goal-done .goal-fill {
  background: var(--green-light);
}

.goal-count {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
}

.goal-done .goal-count {
  color: var(--green-primary);
}

/* ===== Category Progress ===== */
.category-progress {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cat-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cat-name {
  width: 120px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-light);
  text-transform: capitalize;
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cat-bar {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.cat-fill {
  height: 100%;
  background: var(--green-mid);
  border-radius: 4px;
  transition: width 0.5s ease;
}

.cat-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  width: 50px;
  text-align: right;
  flex-shrink: 0;
}