:root {
  --paper: #f4ead2;
  --paper-deep: #ead9b4;
  --ink: #1c2430;
  --muted: #5c6570;
  --navy: #1a3654;
  --red: #8b1e1e;
  --rule: #c23b3b;
  --line: #d8c6a0;
  --today: #fff7d6;
  --test: #9b2c2c;
  --shadow: 0 12px 32px rgba(28, 36, 48, 0.12);
  font-family: "Noto Sans TC", "PingFang TC", "Hiragino Sans CNS",
    "Microsoft JhengHei", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.45;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0 auto;
  max-width: 1240px;
  min-height: 100vh;
  padding: 1.25rem 1rem 2.5rem;
  background: var(--paper);
}

.login-body {
  display: grid;
  place-items: center;
  max-width: none;
  padding: 1.5rem;
}

.masthead,
.login-card,
.lane,
.grid-wrap,
.day-card,
.calendar-grid,
.calendar-day-panel,
.urgency-list,
.detail {
  background: #fffdf6;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.masthead {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.15rem;
}

.login-card {
  width: min(26rem, 100%);
  padding: 1.75rem 1.5rem 1.6rem;
}

.eyebrow {
  margin: 0 0 0.2rem;
  color: var(--red);
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: 0.04em;
}

h1 span,
.subtitle {
  display: block;
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.lede,
.legend,
.status {
  margin: 0.9rem 0 0;
}

.lede,
.status {
  color: var(--muted);
  font-size: 0.95rem;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.chip,
.badge {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.chip.homework,
.hw {
  color: var(--navy);
  background: #d9e4f0;
}

.chip.test,
.badge {
  color: #fff8ee;
  background: var(--test);
}

.chip.done {
  color: #1e4d2b;
  background: #d7eedd;
}

.chip.late {
  color: #fff8ee;
  background: var(--test);
}

.tabs,
.cal-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
}

.cal-nav {
  align-items: center;
  justify-content: space-between;
}

.cal-title {
  margin: 0;
  color: var(--navy);
  font-size: 1.15rem;
}

.tab,
.filter,
.tiny {
  margin: 0;
  width: auto;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--navy);
  border-radius: 6px;
  background: transparent;
  color: var(--navy);
  font-weight: 700;
}

.tab.is-active,
.filter.is-active {
  background: var(--navy);
  color: #f4ead2;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.85rem 0 0;
}

.item {
  margin: 0 0 0.55rem;
}

.item-title,
.task-link {
  margin: 0.2rem 0 0;
  padding: 0;
  border: 0;
  background: none;
  color: var(--navy);
  font: inherit;
  font-weight: 700;
  text-align: left;
  text-decoration: underline;
  text-underline-offset: 0.12em;
  cursor: pointer;
}

.item-desc,
.item-meta {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.item.is-done .item-title,
.item.is-done .task-link {
  color: #3d5a45;
}

.item.is-overdue .item-meta {
  color: var(--red);
  font-weight: 700;
}

.item-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.4rem;
}

.tiny {
  padding: 0.2rem 0.45rem;
  font-size: 0.72rem;
}

.tiny.ghost {
  background: transparent;
}

label {
  display: block;
  margin: 1.1rem 0 0.35rem;
  font-weight: 600;
}

input[type="password"] {
  width: 100%;
  padding: 0.7rem 0.75rem;
  border: 1px solid #b9a57a;
  border-radius: 6px;
  background: #fffdf6;
  font: inherit;
}

button {
  font: inherit;
  cursor: pointer;
}

button[type="submit"] {
  margin-top: 1rem;
  width: 100%;
  padding: 0.75rem 1rem;
  border: 0;
  border-radius: 6px;
  background: var(--navy);
  color: #f7f1e3;
  font-weight: 700;
}

.ghost {
  width: auto;
  margin: 0;
  padding: 0.45rem 0.7rem;
  background: transparent;
  color: var(--navy);
  border: 1px solid var(--navy);
}

.error {
  margin: 0.85rem 0 0;
  padding: 0.55rem 0.65rem;
  background: #f8d7d3;
  color: var(--red);
  border-radius: 6px;
  font-size: 0.9rem;
}

.grid-wrap {
  margin-top: 1rem;
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
  font-size: 0.86rem;
}

th,
td {
  vertical-align: top;
  padding: 0.65rem 0.6rem;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid #ead9b8;
}

th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--navy);
  color: #f4ead2;
  font-weight: 700;
  text-align: left;
}

th.date,
td.date {
  position: sticky;
  left: 0;
  min-width: 7.2rem;
  background: var(--navy);
  color: #f4ead2;
}

td.date {
  background: #243f5e;
  font-weight: 700;
}

td.date .wk {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: #d5c5a0;
}

tr.today td {
  background: var(--today);
}

tr.today td.date {
  background: #8b1e1e;
}

.cell-empty {
  margin: 0;
  color: #9aa3ad;
}

.badge {
  margin-bottom: 0.35rem;
}

.day-cards {
  display: none;
  margin-top: 1rem;
}

.day-card {
  margin-bottom: 0.85rem;
  padding: 0.9rem 0.95rem;
}

.day-card.today {
  outline: 2px solid var(--red);
}

.day-card h2 {
  margin: 0 0 0.65rem;
  color: var(--navy);
  font-size: 1.05rem;
}

.subject-row {
  padding: 0.55rem 0;
  border-top: 1px dashed var(--line);
}

.subject-row dt {
  margin: 0 0 0.2rem;
  color: var(--red);
  font-weight: 700;
  font-size: 0.82rem;
}

.subject-row dd {
  margin: 0;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1rem;
  overflow: hidden;
  background: var(--line);
}

.cal-dow,
.cal-cell {
  min-height: 5.4rem;
  padding: 0.45rem 0.4rem;
  background: #fffdf6;
}

.cal-dow {
  min-height: 0;
  background: var(--navy);
  color: #f4ead2;
  font-size: 0.78rem;
  font-weight: 700;
}

.cal-cell {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.2rem;
  width: 100%;
  border: 0;
  text-align: left;
  color: inherit;
}

.cal-cell.is-empty {
  background: #f7f1e3;
  color: #9aa3ad;
}

.cal-cell.is-outside {
  opacity: 0.45;
}

.cal-cell.is-today {
  background: var(--today);
  outline: 2px solid var(--red);
  outline-offset: -2px;
}

.cal-cell.is-selected {
  box-shadow: inset 0 0 0 2px var(--navy);
}

.cal-num {
  font-weight: 700;
  color: var(--navy);
}

.cal-task {
  overflow: hidden;
  color: var(--ink);
  font-size: 0.72rem;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cal-more {
  color: var(--muted);
  font-size: 0.7rem;
}

.calendar-day-panel {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
}

.calendar-day-panel h3 {
  margin: 0 0 0.7rem;
  color: var(--navy);
}

.urgency-list {
  list-style: disc;
  margin: 1rem 0 0;
  padding: 0.9rem 1rem 0.9rem 1.6rem;
}

.urgency-list li {
  margin: 0 0 0.65rem;
}

.urgency-list li:last-child {
  margin-bottom: 0;
}

.urgency-empty {
  list-style: none;
  margin-left: 0;
  color: var(--muted);
}

.detail {
  width: min(36rem, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  padding: 1.1rem 1.15rem 1.2rem;
  border-radius: 8px;
}

.detail::backdrop {
  background: rgba(28, 36, 48, 0.45);
}

.detail-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
}

.detail-head h2 {
  flex: 1 1 12rem;
  margin: 0;
  color: var(--navy);
  font-size: 1.2rem;
}

.detail-fields {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 0.35rem 0.7rem;
  margin: 1rem 0 0;
}

.detail-fields dt {
  color: var(--muted);
  font-size: 0.8rem;
}

.detail-fields dd {
  margin: 0;
}

.detail-block {
  margin-top: 0.9rem;
  white-space: pre-wrap;
}

.detail-images {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.9rem;
}

.detail-images img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

@media (max-width: 760px) {
  body {
    padding: 1rem 0.75rem 2rem;
  }

  .grid-wrap {
    display: none;
  }

  .day-cards {
    display: block;
  }

  .cal-cell {
    min-height: 3.6rem;
    padding: 0.3rem 0.25rem;
  }

  .cal-task {
    display: none;
  }

  .detail-fields {
    grid-template-columns: 1fr;
  }
}