:root {
  --bg: #f5f6fa;
  --card-bg: #ffffff;
  --text: #1c1e26;
  --muted: #6b7280;
  --border: #e2e4ea;
  --accent: #6c5ce7;
  --accent-hover: #5a4bd1;
  --danger: #e74c3c;
  --success: #2ecc71;
}

[data-theme="dark"] {
  --bg: #14151c;
  --card-bg: #1e2029;
  --text: #eceef2;
  --muted: #9096a6;
  --border: #2c2f3a;
  --accent: #8c7bff;
  --accent-hover: #a293ff;
}

* { box-sizing: border-box; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background 0.2s, color 0.2s;
}

.topbar {
  padding: 2rem 1.5rem 1.5rem;
  text-align: center;
  position: relative;
}

.topbar h1 { margin: 0 0 0.25rem; }
.subtitle { color: var(--muted); margin: 0; }

#theme-toggle {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  display: grid;
  gap: 1.25rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
}

.card h2 { margin-top: 0; }
.hint { font-weight: normal; font-size: 0.85em; color: var(--muted); }

button {
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--accent);
  color: white;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
}

button:hover { background: var(--accent-hover); }

.counter-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#counter-value {
  font-size: 1.5rem;
  font-weight: 700;
  min-width: 2ch;
  text-align: center;
}

form { display: grid; gap: 0.9rem; }

label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.checkbox-label {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

input[type="text"],
input[type="email"],
select,
textarea {
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  display: grid;
  gap: 0.4rem;
}

fieldset label { flex-direction: row; align-items: center; gap: 0.4rem; color: var(--text); }

.result {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg);
  border-radius: 8px;
  font-size: 0.9rem;
  white-space: pre-wrap;
}

#todo-form { flex-direction: row; display: flex; gap: 0.5rem; }
#todo-input { flex: 1; }

#todo-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.5rem;
}

#todo-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}

#todo-list li.done span { text-decoration: line-through; color: var(--muted); }
#todo-list li span { flex: 1; }

.todo-delete {
  background: var(--danger);
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
}

.tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; }

.tab-btn {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.tab-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.tab-panel { color: var(--text); }
.tab-panel pre { background: var(--bg); padding: 0.75rem; border-radius: 8px; overflow-x: auto; }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.modal-overlay[hidden] {
  display: none;
}

.modal {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  max-width: 320px;
  text-align: center;
}

.dnd-row {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

#drag-chip {
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: white;
  border-radius: 8px;
  cursor: grab;
  user-select: none;
}

#drop-zone {
  flex: 1;
  min-height: 60px;
  border: 2px dashed var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  transition: background 0.15s, border-color 0.15s;
}

#drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--bg);
}

#drop-zone.dropped {
  border-color: var(--success);
  color: var(--success);
  border-style: solid;
}

.star-row { display: flex; align-items: center; gap: 0.25rem; }

.star-btn {
  background: transparent;
  border: none;
  color: var(--border);
  font-size: 1.75rem;
  line-height: 1;
  padding: 0.1rem 0.15rem;
}

.star-btn:hover { background: transparent; }

.star-btn.filled { color: #f5b301; }

#rating-reset {
  margin-left: 0.75rem;
  font-size: 0.8rem;
  padding: 0.3rem 0.6rem;
}

#rating-status { color: var(--muted); margin: 0.5rem 0 0; }

textarea { width: 100%; resize: vertical; }

#echo-output {
  margin-top: 0.75rem;
  background: var(--bg);
  padding: 0.75rem;
  border-radius: 8px;
  min-height: 1.5rem;
  white-space: pre-wrap;
  word-break: break-word;
}

#clock {
  font-size: 2rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding-bottom: 2rem;
}