:root {
  --bg: #FAFAFA;
  --surface: #FFFFFF;
  --ink: #09090B;
  --ink-muted: #71717A;
  --accent: #B48135;
  --accent-hover: #8C6226;
  --border: #E4E4E7;
  --error: #B42318;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #09090B;
    --surface: #18181B;
    --ink: #FAFAFA;
    --ink-muted: #A1A1AA;
    --accent: #D4A359;
    --accent-hover: #E8B972;
    --border: #27272A;
    --error: #F97066;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
}

/* -- 로그인 화면 -- */
.auth-box {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 24px;
}

.auth-box h1 {
  margin: 0 0 8px;
  font-size: 1.4rem;
}

.auth-box form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  max-width: 320px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.auth-box label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.auth-box input {
  font-family: inherit;
  font-size: 1rem;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--ink);
}

button {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

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

.error {
  color: var(--error);
  font-size: 0.9rem;
  margin: 0;
}

/* -- 로그인 후 화면 (사이드바 + 본문) -- */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand {
  font-weight: 600;
  margin-bottom: 16px;
}

.nav-link {
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
}

.nav-link.active {
  background: var(--surface);
  font-weight: 600;
}

.nav-link.disabled {
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
}

.nav-link.disabled small {
  color: var(--ink-muted);
  font-size: 0.72rem;
}

.logout-form {
  margin-top: auto;
}

.logout-form button {
  width: 100%;
  background: transparent;
  color: var(--ink-muted);
  border: 1px solid var(--border);
}

.logout-form button:hover {
  background: var(--surface);
  color: var(--ink);
}

.content {
  flex: 1;
  padding: 32px 40px;
}

.widget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-top: 20px;
  max-width: 640px;
}

.widget {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  text-decoration: none;
  color: inherit;
  display: block;
}

.widget:hover {
  border-color: var(--accent);
}

.widget-label {
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.widget-value {
  font-size: 1.8rem;
  font-weight: 600;
  margin-top: 6px;
}

.hint {
  color: var(--ink-muted);
  font-size: 0.85rem;
  margin-top: 28px;
}

/* -- 공용 입력 폼 -- */
.inline-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 20px 0;
}

.inline-form input {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
}

.inline-form input[name="title"] {
  flex: 1;
  min-width: 160px;
}

.delete-btn {
  background: transparent;
  border: none;
  color: var(--ink-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0 4px;
}

.delete-btn:hover {
  color: var(--error);
}

/* -- 할일관리 -- */
.todo-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 560px;
}

.todo-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 4px;
  border-bottom: 1px solid var(--border);
}

.todo-item.done .todo-title {
  color: var(--ink-muted);
  text-decoration: line-through;
}

.todo-check form { margin: 0; }

.check-btn {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.todo-title {
  flex: 1;
}

.due-badge {
  font-size: 0.78rem;
  color: var(--ink-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
}

.due-badge.overdue {
  color: var(--error);
  border-color: var(--error);
}

.todo-delete form { margin: 0; }

.empty {
  color: var(--ink-muted);
  padding: 10px 4px;
}

/* -- 일정관리 -- */
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}

.calendar-header h1 {
  font-size: 1.2rem;
  margin: 0;
  min-width: 140px;
  text-align: center;
}

.calendar-header a {
  color: var(--ink-muted);
  text-decoration: none;
}

.calendar-header a:hover {
  color: var(--accent);
}

.calendar-grid {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.calendar-grid th {
  font-size: 0.8rem;
  color: var(--ink-muted);
  padding: 6px 0;
  font-weight: 500;
}

.calendar-grid td {
  border: 1px solid var(--border);
  vertical-align: top;
  padding: 6px;
  height: 90px;
  width: 14.28%;
  overflow: hidden;
}

.calendar-grid td.other-month {
  background: var(--surface);
  color: var(--ink-muted);
}

.calendar-grid td.today .day-num {
  color: #fff;
  background: var(--accent);
  border-radius: 6px;
  display: inline-block;
  padding: 0 6px;
}

.day-num {
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.event-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  font-size: 0.72rem;
  background: var(--surface);
  border-radius: 4px;
  padding: 2px 4px;
  margin-bottom: 2px;
}

.event-chip form { margin: 0; }

.event-form {
  margin-top: 24px;
}