/* ============================================
   LJL v0.7 - Apple-inspired Design System
   ============================================ */

/* CSS Variables */
:root {
  /* Theme colors (set dynamically by ThemeManager) */
  --bg-primary: #ffffff;
  --bg-secondary: #f2f2f7;
  --bg-tertiary: #ffffff;
  --text-primary: #000000;
  --text-secondary: #3c3c43;
  --text-tertiary: #3c3c4399;
  --border-color: #d1d1d6;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);

  /* Default customizable values */
  --primary-color: #007aff;
  --font-size-base: 16px;
  --font-size-annotation: 24px;
  --draw-field-size: 256px;
  --kana-card-size: 80px;
  --border-radius: 12px;
  --animation-duration: 0.3s;

  /* Font system */
  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Dark theme */
[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #1c1c1e;
  --bg-tertiary: #2c2c2e;
  --text-primary: #ffffff;
  --text-secondary: #ebebf5;
  --text-tertiary: #ebebf599;
  --border-color: #38383a;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: var(--font-system);
  font-size: var(--font-size-base);
  line-height: 1.5;
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: background var(--animation-duration) ease,
    color var(--animation-duration) ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
/* Container */
.container {
  max-width: 900px;
  margin: 32px auto;
  padding: 24px;
  background: var(--bg-tertiary);
  border-radius: calc(var(--border-radius) * 2);
  box-shadow: var(--shadow);
  transition: all var(--animation-duration) ease;
}

/* Header */
h1 {
  font-size: calc(var(--font-size-base) * 2.25);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

h2 {
  font-size: calc(var(--font-size-base) * 1.5);
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

h3 {
  font-size: calc(var(--font-size-base) * 1.125);
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

/* Settings gear button */
.settings-gear {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 20px;
  transition: all var(--animation-duration) ease;
}

.settings-gear:hover {
  background: var(--border-color);
  transform: rotate(90deg);
}

.settings-gear:active {
  transform: rotate(90deg) scale(0.95);
}
/* Controls */
.controls {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  transition: all var(--animation-duration) ease;
}

.controls label {
  font-size: calc(var(--font-size-base) * 0.875);
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.controls select,
.controls input[type="file"] {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: calc(var(--border-radius) * 0.75);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: calc(var(--font-size-base) * 0.875);
  transition: all var(--animation-duration) ease;
  cursor: pointer;
}

.controls select:hover,
.controls input[type="file"]:hover {
  border-color: var(--primary-color);
}

.controls select:focus,
.controls input[type="file"]:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}
/* Kana Display */
.kana-display {
  font-size: 96px;
  text-align: center;
  padding: 32px 0;
  min-height: 140px;
  color: var(--text-primary);
  font-weight: 300;
  transition: all var(--animation-duration) ease;
  animation: fadeIn var(--animation-duration) ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-10px);
  }
  75% {
    transform: translateX(10px);
  }
}

/* Romaji Input Area */
.romaji-area {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 16px;
  animation: slideUp var(--animation-duration) ease;
}

.romaji-area input {
  padding: 12px 16px;
  font-size: calc(var(--font-size-base) * 1.125);
  width: 280px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transition: all var(--animation-duration) ease;
  font-family: var(--font-system);
}

.romaji-area input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.romaji-area input::placeholder {
  color: var(--text-tertiary);
}
/* Canvas Drawing Area */
.canvas-wrap {
  position: relative;
  width: 512px;
  height: 512px;
  margin: 0 auto;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-tertiary);
  overflow: hidden;
  transition: all var(--animation-duration) ease;
}

canvas {
  display: block;
}

canvas.ref {
  position: absolute;
  right: 0;
  top: 0;
  opacity: 0.15;
  pointer-events: none;
}

.draw-controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 16px;
  animation: slideUp var(--animation-duration) ease 0.1s backwards;
}

.draw-controls label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: calc(var(--font-size-base) * 0.875);
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.draw-controls input[type="checkbox"] {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  cursor: pointer;
  accent-color: var(--primary-color);
}
/* Utility Classes */
.hidden {
  display: none !important;
}

/* Feedback Messages */
.feedback {
  text-align: center;
  font-weight: 600;
  font-size: calc(var(--font-size-base) * 1.125);
  margin-top: 16px;
  padding: 12px;
  border-radius: var(--border-radius);
  transition: all var(--animation-duration) ease;
  animation: scaleIn var(--animation-duration) ease;
}

.feedback.success {
  color: #34c759;
  background: rgba(52, 199, 89, 0.1);
}

.feedback.error {
  color: #ff3b30;
  background: rgba(255, 59, 48, 0.1);
  animation: shake 0.5s ease;
}

.draw-result {
  text-align: center;
  margin-top: 12px;
  font-size: calc(var(--font-size-base) * 0.875);
  color: var(--text-secondary);
  animation: fadeIn var(--animation-duration) ease;
}

.api-status {
  text-align: center;
  margin-top: 12px;
  font-size: calc(var(--font-size-base) * 0.875);
  font-weight: 500;
  min-height: 24px;
  transition: all var(--animation-duration) ease;
  animation: fadeIn var(--animation-duration) ease;
}
/* Stats Section */
.stats {
  margin-top: 32px;
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  transition: all var(--animation-duration) ease;
}

#statsContent {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Buttons */
button {
  padding: 10px 20px;
  border-radius: calc(var(--border-radius) * 0.75);
  border: none;
  background: var(--primary-color);
  color: white;
  font-family: var(--font-system);
  font-size: calc(var(--font-size-base) * 0.875);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--animation-duration) ease;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

button:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(0, 122, 255, 0.2);
}

button.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: none;
}

button.btn-secondary:hover {
  background: var(--border-color);
  box-shadow: none;
}

/* Footer */
footer {
  margin-top: 24px;
  text-align: center;
  color: var(--text-tertiary);
  font-size: calc(var(--font-size-base) * 0.875);
}

footer code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", "Monaco", "Menlo", monospace;
}

/* Multi-cell Kana Display */
.kana-cells {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: stretch;
  animation: slideUp var(--animation-duration) ease;
}

.kana-cell {
  min-width: var(--kana-card-size);
  min-height: calc(var(--kana-card-size) * 1.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(var(--kana-card-size) * 0.8);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-tertiary);
  padding: 12px;
  transition: all var(--animation-duration) ease;
  animation: scaleIn var(--animation-duration) ease;
}

.kana-cell:hover {
  border-color: var(--primary-color);
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 122, 255, 0.15);
}

.kana-cell.small {
  font-size: calc(var(--kana-card-size) * 0.5);
}

.kana-annotation {
  text-align: center;
  color: var(--text-tertiary);
  margin-top: 12px;
  font-size: var(--font-size-annotation);
}

/* Draw Canvases Layout */
.draw-canvases {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  animation: fadeIn var(--animation-duration) ease;
  /* Prevent accidental scrolling when drawing on mobile */
  overscroll-behavior: contain;
}

.draw-canvas-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.draw-canvas-overlay {
  position: relative;
  width: var(--draw-field-size);
  height: var(--draw-field-size);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--animation-duration) ease;
}

.draw-canvas-overlay:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

.draw-canvas-overlay canvas {
  position: absolute;
  left: 0;
  top: 0;
  width: var(--draw-field-size);
  height: var(--draw-field-size);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
}

.ref-canvas {
  z-index: 1;
  opacity: 0.15;
  background: var(--bg-tertiary);
}

.user-canvas {
  z-index: 2;
  background: transparent;
  /* Prevent scrolling/zooming on mobile when drawing */
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

/* Hide reference canvases */
.draw-area.refs-hidden .ref-canvas {
  display: none !important;
}

/* Per-field result styling */
.draw-result-span.pass {
  color: #34c759;
  font-weight: 600;
}

.draw-result-span.fail {
  color: #ff3b30;
  font-weight: 600;
}

/* ============================================
   Modal Windows (Alphabet & Settings)
   ============================================ */

/* Base Modal Styles */
.alphabet-modal,
.settings-modal {
  position: fixed;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--animation-duration) ease;
  animation: fadeIn var(--animation-duration) ease;
}

.alphabet-modal.hidden,
.settings-modal.hidden {
  display: none !important;
}

.alphabet-modal-content,
.settings-modal-content {
  background: var(--bg-tertiary);
  padding: 32px 24px 24px 24px;
  border-radius: calc(var(--border-radius) * 2);
  min-width: 340px;
  max-width: 90vw;
  max-height: 85vh;
  overflow: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  position: relative;
  animation: scaleIn var(--animation-duration) ease;
  border: 1px solid var(--border-color);
}

.alphabet-modal-content h2,
.settings-modal-content h2 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: calc(var(--font-size-base) * 1.75);
}

.alphabet-modal-close,
.settings-modal-close {
  position: absolute;
  right: 16px;
  top: 16px;
  font-size: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-weight: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--animation-duration) ease;
  color: var(--text-secondary);
}

.alphabet-modal-close:hover,
.settings-modal-close:hover {
  background: var(--border-color);
  transform: rotate(90deg);
}

/* Alphabet Table */
.alphabet-modal table {
  border-collapse: collapse;
  margin: 0 auto;
}

.alphabet-modal td {
  border: 1px solid var(--border-color);
  padding: 12px 14px;
  text-align: center;
  font-size: 32px;
  min-width: 44px;
  background: var(--bg-tertiary);
  transition: all var(--animation-duration) ease;
}

.alphabet-modal td:hover {
  background: var(--bg-secondary);
  transform: scale(1.1);
}

.alphabet-modal td div {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 4px;
  font-weight: 500;
}

/* ============================================
   Settings Panel Styles
   ============================================ */

.settings-section {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.settings-section:last-of-type {
  border-bottom: none;
}

.setting-item {
  margin-bottom: 16px;
}

.setting-item label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: calc(var(--font-size-base) * 0.875);
  color: var(--text-secondary);
  font-weight: 500;
}

.setting-item label span {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.setting-select {
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: calc(var(--border-radius) * 0.75);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: calc(var(--font-size-base) * 0.875);
  font-family: var(--font-system);
  cursor: pointer;
  transition: all var(--animation-duration) ease;
}

.setting-select:hover {
  border-color: var(--primary-color);
}

.setting-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.setting-range {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-secondary);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.setting-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.3);
  transition: all var(--animation-duration) ease;
}

.setting-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.setting-range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.3);
  transition: all var(--animation-duration) ease;
}

.setting-range::-moz-range-thumb:hover {
  transform: scale(1.2);
}

.setting-color {
  width: 60px;
  height: 40px;
  border: 1px solid var(--border-color);
  border-radius: calc(var(--border-radius) * 0.75);
  cursor: pointer;
  transition: all var(--animation-duration) ease;
}

.setting-color:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.setting-checkbox {
  flex-direction: row !important;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.setting-checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  cursor: pointer;
  accent-color: var(--primary-color);
  margin-right: 8px;
}

.settings-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  .container {
    margin: 16px;
    padding: 16px;
  }

  h1 {
    font-size: calc(var(--font-size-base) * 1.75);
    flex-direction: column;
    gap: 12px;
  }

  .controls {
    flex-direction: column;
    align-items: stretch;
  }

  .kana-display {
    font-size: 72px;
    padding: 24px 0;
  }

  .romaji-area input {
    width: 100%;
  }

  .draw-canvas-overlay {
    width: calc(var(--draw-field-size) * 0.8);
    height: calc(var(--draw-field-size) * 0.8);
  }

  .draw-canvas-overlay canvas {
    width: calc(var(--draw-field-size) * 0.8);
    height: calc(var(--draw-field-size) * 0.8);
  }

  .settings-modal-content,
  .alphabet-modal-content {
    width: 95vw;
    padding: 24px 16px 16px 16px;
  }

  .settings-actions {
    flex-direction: column;
  }
}

/* ============================================
   Accessibility & Focus States
   ============================================ */

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

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button:disabled:hover {
  transform: none;
  box-shadow: none;
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .controls,
  .draw-controls,
  .settings-gear,
  button {
    display: none !important;
  }

  .container {
    box-shadow: none;
    border: 1px solid #000;
  }
}