/* Minimal Design - Wikipedia-inspired */
:root {
  --bg: #ffffff;
  --text: #202122;
  --text-secondary: #54595d;
  --text-muted: #72777d;
  --border: #a2a9b1;
  --border-light: #eaecf0;
  --link: #3366cc;
  --highlight: #fff8dc;
  --font-serif: 'Georgia', 'Times New Roman', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

/* App Container */
#app {
  max-width: 720px;
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
}

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

.screen.active {
  display: flex;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
}

.header h1 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: normal;
}

.header h2 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: normal;
}

.header-buttons {
  display: flex;
  gap: 4px;
}

/* Icon Button */
.icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
}

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

/* Home Screen */
.home-content {
  flex: 1;
  padding: 24px 16px;
}

.stats-card {
  display: flex;
  justify-content: flex-start;
  gap: 32px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 24px;
}

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

.stat-value {
  font-family: var(--font-serif);
  font-size: 1.5rem;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.message-card {
  padding: 24px 0;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.message-card p {
  margin-bottom: 8px;
}

/* Buttons */
.primary-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--link);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.15s;
}

.primary-btn:hover:not(:disabled) {
  background: var(--border-light);
}

.primary-btn:disabled {
  color: var(--text-muted);
  cursor: not-allowed;
}

.secondary-btn {
  padding: 8px 14px;
  font-size: 0.875rem;
  color: var(--link);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
}

.secondary-btn:hover {
  background: var(--border-light);
}

.danger-btn {
  padding: 8px 14px;
  font-size: 0.875rem;
  color: #d33;
  background: transparent;
  border: 1px solid #d33;
  border-radius: 2px;
  cursor: pointer;
}

.danger-btn:hover {
  background: #fee;
}

/* Last Text Card */
.last-text-card {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.last-text-card h3 {
  font-family: var(--font-serif);
  font-size: 0.9375rem;
  font-weight: normal;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.last-text-stats {
  display: flex;
  gap: 24px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Text History */
.text-history {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.text-history h3 {
  font-family: var(--font-serif);
  font-size: 0.9375rem;
  font-weight: normal;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.text-history-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
}

.text-history-item:hover {
  background: var(--border-light);
  margin: 0 -16px;
  padding: 12px 16px;
}

.text-history-item .title {
  font-size: 0.9375rem;
  color: var(--link);
  margin-bottom: 4px;
}

.text-history-item .meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Reader Screen */
#reader-screen {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

.reader-header {
  padding: 12px 16px;
  flex-shrink: 0;
  background: var(--bg);
}

.reader-progress {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.reader-content {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  position: relative;
  min-height: 0; /* Important for flex child scrolling */
}

.text-container {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.8;
}

.text-container .word {
  display: inline;
  cursor: pointer;
  border-radius: 2px;
}

.text-container .word.new {
  background: #cce5ff;
}

.text-container .word.learning {
  background: var(--highlight);
}

.text-container .word.tapped {
  background: #e6e6e6;
}

.text-container .word.selected {
  background: #cce5ff;
}

.text-container .word.ignored {
  color: var(--text-muted);
}

.text-container .word.speaking {
  text-decoration: underline;
  text-decoration-color: var(--link);
  text-underline-offset: 3px;
}

.reader-footer {
  padding: 16px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
  background: var(--bg);
}

.footer-left {
  display: flex;
  gap: 8px;
}

.play-text-btn,
.stop-text-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
}

.play-text-btn:hover,
.stop-text-btn:hover {
  background: var(--link);
  border-color: var(--link);
  color: white;
}

.play-text-btn.playing {
  background: var(--link);
  border-color: var(--link);
  color: white;
}

.play-text-btn.loading {
  position: relative;
  pointer-events: none;
}

.play-text-btn.loading svg {
  visibility: hidden;
}

.play-text-btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--link);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.text-size-controls {
  display: flex;
  gap: 8px;
}

.size-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
}

.size-btn:hover {
  background: var(--border-light);
  color: var(--text);
}

/* Translation Popup */
.translation-popup {
  position: absolute;
  z-index: 200;
  pointer-events: none;
}

.popup-content {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px;
  min-width: 200px;
  max-width: 300px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  pointer-events: auto;
}

.popup-content::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 20px;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid var(--border);
}

.popup-content::after {
  content: '';
  position: absolute;
  top: -7px;
  left: 21px;
  width: 0;
  height: 0;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-bottom: 7px solid var(--bg);
}

.popup-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 4px;
}

.popup-term-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.popup-term {
  font-family: var(--font-serif);
  font-size: 1.25rem;
}

.popup-speak-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.popup-speak-btn:hover {
  background: var(--link);
  border-color: var(--link);
  color: white;
}

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

.popup-speak-btn.speaking {
  background: var(--link);
  border-color: var(--link);
  color: white;
}

.popup-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  margin: -8px -8px 0 0;
}

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

.popup-state {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  padding: 2px 8px;
  border-radius: 2px;
  display: inline-block;
}

.popup-state.new {
  color: var(--link);
  background: #e6f0ff;
}

.popup-state.learning {
  color: #92400e;
  background: var(--highlight);
}

.popup-state.learned {
  color: #166534;
  background: #dcfce7;
}

.popup-translation {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.popup-translation.loading {
  color: var(--text-muted);
  font-style: italic;
}

.popup-actions {
  display: flex;
  gap: 8px;
}

.popup-btn {
  padding: 10px 16px;
  font-size: 0.875rem;
  color: var(--link);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
  flex: 1;
}

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

.popup-btn.primary:hover {
  background: #2255bb;
}

.popup-btn:hover {
  background: var(--border-light);
}

.popup-btn.secondary {
  color: var(--text-muted);
}

/* Feedback Screen */
.feedback-content {
  flex: 1;
  padding: 24px 16px;
}

.feedback-stats {
  margin-bottom: 32px;
}

.feedback-stats h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: normal;
  margin-bottom: 12px;
}

.feedback-stat {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 0.9375rem;
  border-bottom: 1px solid var(--border-light);
}

.feedback-buttons {
  display: flex;
  gap: 12px;
}

.feedback-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 8px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
  font-size: 0.875rem;
}

.feedback-btn:hover {
  background: var(--border-light);
}

.feedback-icon {
  font-size: 1.5rem;
}

/* Settings Screen */
.settings-content {
  flex: 1;
  padding: 24px 16px;
}

.settings-group {
  margin-bottom: 32px;
}

.settings-group h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: normal;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 12px;
}

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
}

.setting-row label {
  font-size: 0.9375rem;
}

.setting-row select,
.setting-row input[type="password"] {
  padding: 6px 10px;
  font-size: 0.875rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--bg);
  min-width: 140px;
}

.setting-row input[type="password"] {
  width: 180px;
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255,255,255,0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 300;
}

.loading-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-light);
  border-top-color: var(--text-secondary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

#loading-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* Card class for backwards compatibility */
.card {
  /* No special styling in minimal design */
}

/* Safe area padding */
@supports (padding: env(safe-area-inset-bottom)) {
  .reader-footer,
  .feedback-content {
    padding-bottom: max(16px, env(safe-area-inset-bottom));
  }
}

/* Login Screen */
.login-screen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-container {
  text-align: center;
  padding: 32px;
  max-width: 320px;
  width: 100%;
}

.login-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: normal;
  margin-bottom: 8px;
}

.login-subtitle {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 32px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-form .primary-btn {
  text-align: center;
  justify-content: center;
}

.login-form input[type="password"] {
  padding: 12px 16px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  text-align: center;
}

.login-form input[type="password"]:focus {
  outline: none;
  border-color: var(--link);
}

.login-error {
  color: #d33;
  font-size: 0.875rem;
  margin-top: 12px;
}

/* Stats Display */
.stats-display {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.stats-period {
  flex: 1;
  min-width: 140px;
}

.stats-period h4 {
  font-family: var(--font-serif);
  font-size: 0.875rem;
  font-weight: normal;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* Prompt Input */
.prompt-input-section {
  margin-bottom: 16px;
}

.prompt-label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.prompt-input {
  width: 100%;
  padding: 10px 12px;
  font-size: 0.9375rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--bg);
}

.prompt-input:focus {
  outline: none;
  border-color: var(--link);
}

.prompt-input::placeholder {
  color: var(--text-muted);
}

/* Sync Status */
.sync-status {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.sync-status.syncing {
  color: var(--link);
}

.sync-status.error {
  color: #d33;
}