/* Reset */
* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Segoe UI", Roboto, sans-serif;
  background: #f5f5f7;
  color: #1c1c1e;
  overscroll-behavior: none;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100%;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

#app {
  width: 100%;
  max-width: 520px;
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px;
}

.screen {
  display: none;
  flex-direction: column;
  flex: 1;
}

.screen.active {
  display: flex;
}

h1, h2 {
  text-align: center;
  margin: 0 0 12px 0;
  font-weight: 700;
}

h1 {
  font-size: 1.8rem;
  margin-top: 24px;
}

h2 {
  font-size: 1.5rem;
  margin-top: 16px;
}

.note, .warning {
  font-size: 0.85rem;
  color: #636366;
  line-height: 1.5;
  text-align: center;
  margin: 0 0 16px 0;
}

.warning {
  color: #c0392b;
}

.menu-buttons,
.session-controls,
.settings-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

button {
  border: none;
  border-radius: 14px;
  padding: 16px 20px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.05s, background 0.15s;
  -webkit-user-select: none;
  user-select: none;
}

button:active {
  transform: scale(0.97);
}

button.primary {
  background: #007aff;
  color: #fff;
}

button.secondary {
  background: #e5e5ea;
  color: #1c1c1e;
}

button.danger {
  background: #ff3b30;
  color: #fff;
}

button.manual {
  background: #ff9500;
  color: #fff;
  font-size: 1.05rem;
}

button.manual small {
  font-weight: 400;
  opacity: 0.9;
}

.hidden {
  display: none !important;
}

.info {
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  text-align: center;
  font-size: 0.9rem;
  color: #3a3a3c;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* Session header */
.session-header {
  background: #fff;
  border-radius: 16px;
  padding: 12px 16px;
  margin-bottom: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.level-progress {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  margin-bottom: 8px;
}

#session-level {
  color: #007aff;
}

.timer-bar {
  height: 10px;
  background: #e5e5ea;
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 6px;
}

#timer-fill {
  height: 100%;
  width: 100%;
  background: #34c759;
  transform-origin: left;
  transition: width 0.1s linear, background 0.2s;
}

#timer-fill.urgent {
  background: #ff9500;
}

#timer-fill.danger {
  background: #ff3b30;
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

#timer-text {
  text-align: right;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 1.2rem;
}

/* Previous words scroll list */
#previous-list {
  max-height: 120px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

#previous-list .item {
  background: #f0f0f5;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.9rem;
  flex-shrink: 0;
}

#previous-list .item.manual {
  background: #fff4e5;
}

/* Question area */
#question-area {
  background: #fff;
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 12px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.prompt {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  word-break: break-word;
  min-height: 2.8rem;
}

.meaning {
  font-size: 1.2rem;
  color: #3a3a3c;
  margin-top: 8px;
}

.hint {
  font-size: 0.9rem;
  color: #8e8e93;
  margin-top: 6px;
}

/* Canvas */
#draw-canvas {
  width: 100%;
  height: auto;
  aspect-ratio: 600 / 350;
  background: #ffffff;
  border: 3px solid #c7c7cc;
  border-radius: 16px;
  touch-action: none;
  cursor: crosshair;
  margin-bottom: 12px;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}

.feedback {
  background: #fff;
  border-radius: 12px;
  padding: 14px;
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.feedback.correct {
  color: #34c759;
}

.feedback.incorrect {
  color: #ff3b30;
}

.feedback.timeout {
  color: #ff9500;
}

.feedback.review {
  color: #007aff;
}

.status {
  font-size: 0.85rem;
  color: #636366;
  text-align: center;
  min-height: 1.2rem;
  margin-top: 4px;
}

/* Settings / forms */
.settings-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.95rem;
  font-weight: 500;
}

.settings-form input,
#parent-pin {
  border: 1px solid #c7c7cc;
  border-radius: 10px;
  padding: 12px;
  font-size: 1.1rem;
}

/* Lists */
.list, .audit-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  max-height: 60vh;
  margin-bottom: 12px;
}

.missed-review ul {
  text-align: left;
  background: #fff;
  border-radius: 12px;
  padding: 14px 18px;
  margin: 12px 0 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  font-size: 1rem;
  line-height: 1.6;
}

.missed-review li {
  margin-bottom: 6px;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  font-size: 0.9rem;
}

.card .title {
  font-weight: 700;
  margin-bottom: 4px;
}

.card img {
  max-width: 100%;
  border: 1px solid #e5e5ea;
  border-radius: 8px;
  margin-top: 8px;
}

.card .actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.card .actions button {
  flex: 1;
  padding: 8px;
  font-size: 0.85rem;
}

/* Dialog */
dialog {
  border: none;
  border-radius: 16px;
  padding: 0;
  background: transparent;
  box-shadow: none;
  max-width: 90vw;
}

dialog::backdrop {
  background: rgba(0,0,0,0.4);
}

.dialog-content {
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  text-align: center;
}

.dialog-content p {
  font-size: 1.05rem;
  margin: 0 0 16px 0;
}

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

.dialog-buttons button {
  flex: 1;
}

/* Utility spacing */
.mb-8 { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }