:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --card: #171a21;
  --border: #2a2e37;
  --text: #e6e8ec;
  --muted: #9aa1ac;
  --accent: #6ea8fe;
  --danger: #ff6b6b;
  --success: #4ade80;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", sans-serif;
  padding: 24px;
}

.wrap {
  width: 100%;
  max-width: 720px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}

.login-card {
  max-width: 360px;
  margin: 0 auto;
}

h1 {
  font-size: 1.4rem;
  margin: 0 0 4px;
}

p.sub {
  color: var(--muted);
  margin: 0 0 24px;
  font-size: 0.9rem;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

input, select {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 16px;
  background: #0f1115;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
}

input:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

button {
  padding: 10px 12px;
  background: var(--accent);
  color: #0f1115;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}

.error {
  color: var(--danger);
  font-size: 0.85rem;
  margin: -8px 0 16px;
  min-height: 1em;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.logout-btn {
  width: auto;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 14px;
  font-weight: 400;
}

/* Todo-specific */
#add-form {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

#add-form input[type="text"] {
  flex: 2;
  min-width: 160px;
  margin-bottom: 0;
}

#add-form input[type="text"]#category-input {
  flex: 1;
  min-width: 100px;
}

#add-form input[type="date"] {
  flex: 1;
  min-width: 140px;
  margin-bottom: 0;
}

#add-form button {
  flex-shrink: 0;
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: #0f1115;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.task-item.done {
  opacity: 0.5;
}

.task-item.done .task-title {
  text-decoration: line-through;
}

.task-checkbox {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

.task-body {
  flex: 1;
  min-width: 0;
}

.task-title {
  font-size: 0.95rem;
  word-break: break-word;
}

.task-meta {
  display: flex;
  gap: 8px;
  margin-top: 4px;
  flex-wrap: wrap;
}

.task-tag {
  font-size: 0.72rem;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
}

.task-due {
  font-size: 0.72rem;
  color: var(--muted);
}

.task-due.overdue {
  color: var(--danger);
}

.task-delete {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 4px 8px;
  flex-shrink: 0;
}

.task-delete:hover {
  color: var(--danger);
}

.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 40px 0;
  font-size: 0.9rem;
}