/* RSVP Speed Reader - Mobile PWA Styles */

:root {
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #25253a;
  --accent: #e94560;
  --accent-dim: rgba(233, 69, 96, 0.2);
  --text-primary: #ffffff;
  --text-secondary: #888888;
  --text-muted: #666666;
  --success: #4ade80;
  --warning: #ffc107;
  --error: #ef4444;
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
}

/* Screen Management */
.screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  flex-direction: column;
  background: var(--bg-primary);
}

.screen.active {
  display: flex;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--bg-tertiary);
}

.app-header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.spacer {
  width: 44px;
}

/* Buttons */
.icon-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius);
  transition: var(--transition);
}

.icon-btn:hover, .icon-btn:focus {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.icon-btn svg {
  width: 24px;
  height: 24px;
}

.primary-btn {
  padding: 14px 24px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.primary-btn:hover, .primary-btn:focus {
  background: #d13a54;
}

.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.primary-btn.full-width {
  width: 100%;
}

.secondary-btn {
  padding: 10px 20px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--text-muted);
  border-radius: var(--radius);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

.secondary-btn:hover, .secondary-btn:focus {
  background: var(--bg-secondary);
  border-color: var(--text-secondary);
}

/* Main Content */
.app-main {
  flex: 1;
  padding: 24px 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* Input Section */
.input-section {
  margin-bottom: 24px;
}

.input-section label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.input-group {
  display: flex;
  gap: 12px;
}

input[type="url"],
input[type="text"],
textarea {
  flex: 1;
  padding: 14px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-tertiary);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

input[type="url"]:focus,
input[type="text"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
}

textarea {
  width: 100%;
  resize: vertical;
  min-height: 120px;
  font-family: inherit;
}

/* Divider */
.divider {
  display: flex;
  align-items: center;
  margin: 24px 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--bg-tertiary);
}

.divider span {
  padding: 0 16px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Loading */
.loading {
  text-align: center;
  padding: 40px;
}

.loading.hidden {
  display: none;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--bg-tertiary);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 16px;
  animation: spin 0.8s linear infinite;
}

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

.loading p {
  color: var(--text-secondary);
}

/* Error */
.error-message {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.error-message.hidden {
  display: none;
}

.error-message p {
  color: var(--error);
  margin-bottom: 16px;
}

/* Install Prompt */
.install-prompt {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--bg-tertiary);
}

.install-prompt.hidden {
  display: none;
}

.install-prompt p {
  flex: 1;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Settings */
.settings-main {
  flex: 1;
  padding: 24px 20px;
  overflow-y: auto;
}

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

.setting-group label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.setting-value {
  color: var(--accent);
  font-weight: 600;
}

input[type="range"] {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 24px;
  height: 24px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
}

.range-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.setting-toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--bg-tertiary);
}

.setting-toggle label {
  font-size: 1rem;
  color: var(--text-primary);
}

input[type="checkbox"] {
  width: 52px;
  height: 28px;
  appearance: none;
  background: var(--bg-tertiary);
  border-radius: 14px;
  cursor: pointer;
  position: relative;
  transition: var(--transition);
}

input[type="checkbox"]::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: var(--transition);
}

input[type="checkbox"]:checked {
  background: var(--accent);
}

input[type="checkbox"]:checked::before {
  left: 26px;
  background: white;
}

.setting-group.advanced {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--bg-tertiary);
}

.setting-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* Reader Screen */
.reader-screen {
  background: var(--bg-primary);
  touch-action: manipulation;
}

.focal-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  pointer-events: none;
  background: linear-gradient(
    to bottom,
    var(--accent) 0%,
    var(--accent) calc(50% - 40px),
    transparent calc(50% - 40px),
    transparent calc(50% + 40px),
    var(--accent) calc(50% + 40px),
    var(--accent) 100%
  );
}

.word-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0 20px;
}

.word-display {
  font-family: 'Courier New', Courier, monospace;
  font-size: 2rem;
  color: var(--text-muted);
  white-space: nowrap;
  user-select: none;
}

.word-display .before,
.word-display .after {
  color: var(--text-muted);
}

.word-display .orp {
  color: var(--accent);
}

.word-display .punctuation {
  color: var(--text-muted);
  opacity: 0.6;
}

.reader-controls {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.reader-progress,
.reader-speed {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.reader-status {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 16px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font-size: 0.8rem;
  font-family: monospace;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.reader-status.paused {
  background: rgba(255, 193, 7, 0.2);
  border-color: var(--warning);
  color: var(--warning);
}

.reader-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-tertiary);
  border-radius: 50%;
  color: var(--text-secondary);
  cursor: pointer;
}

.reader-close svg {
  width: 24px;
  height: 24px;
}

/* Touch Hint */
.touch-hint {
  position: absolute;
  bottom: 120px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  animation: fadeInUp 0.5s ease;
}

.touch-hint.hidden {
  display: none;
}

.touch-hint p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.touch-hint .hint-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* Responsive */
@media (min-width: 600px) {
  .app-main,
  .settings-main {
    max-width: 500px;
    margin: 0 auto;
  }

  .word-display {
    font-size: 2.5rem;
  }
}

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

/* Safe areas for notched phones */
@supports (padding-top: env(safe-area-inset-top)) {
  .app-header {
    padding-top: calc(16px + env(safe-area-inset-top));
  }

  .install-prompt {
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
  }

  .reader-controls {
    bottom: calc(40px + env(safe-area-inset-bottom));
  }

  .reader-status {
    top: calc(20px + env(safe-area-inset-top));
  }

  .reader-close {
    top: calc(16px + env(safe-area-inset-top));
  }
}

/* Hidden utility */
.hidden {
  display: none !important;
}