:root {
  color-scheme: light;
  --bg: #f6f7f4;
  --surface: #ffffff;
  --ink: #172128;
  --muted: #66737b;
  --line: #dfe4e0;
  --accent: #1f5f70;
  --accent-strong: #174a57;
  --warm: #c7783c;
  --green: #47745f;
  --shadow: 0 18px 45px rgba(35, 45, 50, 0.09);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  display: grid;
  grid-template-columns: 280px 1fr;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body:not(.is-authenticated) {
  display: block;
}

body:not(.is-authenticated) .sidebar,
body:not(.is-authenticated) .shell {
  display: none;
}

.landing {
  min-height: 100vh;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background:
    linear-gradient(rgba(22, 37, 43, 0.72), rgba(22, 37, 43, 0.72)),
    url("https://images.unsplash.com/photo-1497633762265-9d179a990aa6?auto=format&fit=crop&w=1800&q=80");
  background-size: cover;
  background-position: center;
}

.landing.active {
  display: flex;
}

.hidden,
.password-card {
  display: none;
}

.password-card.active {
  display: block;
}

.landing-panel {
  width: min(1060px, 100%);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) 420px;
  gap: 28px;
  align-items: center;
}

.landing-copy {
  color: #fff;
}

.landing-copy .brand-mark {
  margin-bottom: 22px;
}

.landing-copy h1 {
  font-size: clamp(38px, 6vw, 76px);
  line-height: 0.98;
  margin: 10px 0 18px;
  max-width: 820px;
}

.landing-copy p:not(.eyebrow) {
  color: #dce7e8;
  font-size: 18px;
  line-height: 1.55;
  max-width: 620px;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.login-card h2,
.login-card p {
  margin: 0;
}

.login-card h2 {
  font-size: 26px;
  margin-bottom: 6px;
}

.login-card label:first-of-type {
  margin-top: 20px;
}

.login-card .primary-btn {
  width: 100%;
}

.login-links {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}

.error-text {
  color: #a33b2f;
  font-weight: 700;
  min-height: 20px;
}

button,
input,
select,
textarea {
  font: inherit;
}

.sidebar {
  min-height: 100vh;
  background: #16252b;
  color: #f8fbfb;
  padding: 24px;
  position: sticky;
  top: 0;
}

.brand {
  display: flex;
  gap: 14px;
  align-items: center;
  margin-bottom: 32px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #f0be6b;
  color: #1b2529;
  font-weight: 800;
}

.brand h1,
.brand p,
.topbar h2,
.eyebrow,
.panel h3 {
  margin: 0;
}

.brand h1 {
  font-size: 19px;
}

.brand p {
  color: #b8c3c7;
  font-size: 13px;
  margin-top: 3px;
}

.nav {
  display: grid;
  gap: 8px;
}

.nav-item {
  width: 100%;
  border: 0;
  color: #d9e2e5;
  background: transparent;
  padding: 12px 14px;
  text-align: left;
  border-radius: 8px;
  cursor: pointer;
}

.nav-item:hover,
.nav-item.active {
  background: rgba(255, 255, 255, 0.11);
  color: #fff;
}

.shell {
  padding: 28px;
  min-width: 0;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  margin-bottom: 24px;
}

.eyebrow {
  color: var(--warm);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0;
}

.topbar h2 {
  font-size: 30px;
  margin-top: 4px;
}

.top-actions,
.dialog-actions,
.stack {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.primary-btn,
.ghost-btn,
.text-btn,
.file-control {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 10px 14px;
  cursor: pointer;
  min-height: 42px;
}

.primary-btn {
  background: var(--accent);
  color: white;
}

.primary-btn:hover {
  background: var(--accent-strong);
}

.primary-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.ghost-btn,
.file-control {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
}

.text-btn {
  background: transparent;
  color: var(--accent);
  padding-inline: 0;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.metric,
.panel,
.item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.metric {
  padding: 20px;
}

.metric span {
  font-size: 34px;
  font-weight: 800;
}

.metric p,
.muted,
.fine-print {
  color: var(--muted);
}

.metric p {
  margin: 4px 0 0;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.panel {
  padding: 18px;
  box-shadow: var(--shadow);
}

.wide-panel {
  grid-column: 1 / -1;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.board-header {
  align-items: flex-end;
}

.week-picker {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  min-width: 160px;
}

.task-list-board,
.task-tile-board {
  display: grid;
  gap: 16px;
}

.task-tile-board {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
}

.task-group {
  background: #f7f9f8;
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 320px;
  padding: 12px;
}

.task-group-header,
.task-row-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.task-group-header {
  margin-bottom: 12px;
}

.task-group-header h4 {
  margin: 0;
}

.task-group-header span {
  color: var(--muted);
  font-weight: 700;
}

.checklist {
  display: grid;
  gap: 10px;
}

.task-row {
  display: grid;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

.task-tile {
  cursor: grab;
  box-shadow: 0 8px 20px rgba(35, 45, 50, 0.06);
}

.task-tile:hover {
  border-color: #bfd0c9;
}

.task-tile:active {
  cursor: grabbing;
}

.task-check {
  display: flex;
  grid-template-columns: none;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
}

.task-check input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--accent);
  cursor: pointer;
}

.task-check strong {
  line-height: 1.3;
}

.task-check span {
  display: grid;
  gap: 3px;
  color: var(--ink);
  font-size: 15px;
}

.task-check small {
  color: var(--muted);
  font-weight: 600;
}

.task-row p {
  color: var(--muted);
  line-height: 1.45;
  margin: 0;
}

.task-row-actions {
  flex-wrap: wrap;
  justify-content: flex-start;
}

.task-row-actions .tag {
  margin-right: auto;
}

.small-empty {
  padding: 12px;
  font-size: 13px;
}

.list {
  display: grid;
  gap: 10px;
}

.item {
  padding: 14px;
  display: grid;
  gap: 8px;
}

.week-schedule {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfb;
  padding: 14px;
}

.week-schedule-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.week-schedule-header h4,
.week-schedule-header p,
.subject-schedule h5,
.schedule-row p {
  margin: 0;
}

.week-schedule-header h4 {
  font-size: 18px;
}

.week-schedule-header p {
  color: var(--muted);
  margin-top: 3px;
}

.subject-schedule-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.subject-schedule {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

.subject-schedule h5 {
  font-size: 15px;
  margin-bottom: 10px;
}

.schedule-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: flex-start;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.schedule-row:first-child {
  border-top: 0;
  padding-top: 0;
}

.schedule-row p {
  color: var(--muted);
  line-height: 1.45;
  margin-top: 4px;
}

.item-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.item h4 {
  margin: 0;
  font-size: 16px;
}

.item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.tag {
  border-radius: 999px;
  background: #e9f0ee;
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
  padding: 5px 9px;
  white-space: nowrap;
}

.item-actions {
  display: flex;
  gap: 8px;
}

.small-btn {
  border: 1px solid var(--line);
  background: #fbfcfb;
  border-radius: 7px;
  padding: 7px 10px;
  cursor: pointer;
}

.empty {
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 18px;
}

dialog {
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  width: min(520px, calc(100vw - 28px));
  padding: 0;
}

dialog::backdrop {
  background: rgba(18, 28, 32, 0.42);
}

form {
  padding: 18px;
}

.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  cursor: pointer;
}

label {
  display: grid;
  gap: 7px;
  margin-bottom: 13px;
}

label span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fbfcfb;
  color: var(--ink);
}

textarea {
  resize: vertical;
}

.profile-card {
  margin-top: 14px;
}

.user-form {
  margin-top: 18px;
  padding: 0;
}

.profile-card dl {
  display: grid;
  gap: 10px;
  margin: 0 0 14px;
}

.profile-card div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 10px;
}

.profile-card dt {
  color: var(--muted);
  font-weight: 700;
}

.profile-card dd {
  margin: 0;
}

code {
  background: #edf2ef;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 6px;
}

.dialog-actions {
  justify-content: flex-end;
}

.file-control input {
  display: none;
}

.fine-print {
  font-size: 13px;
  margin: 0;
}

a {
  color: var(--accent);
}

@media (max-width: 900px) {
  body {
    grid-template-columns: 1fr;
  }

  .sidebar {
    min-height: auto;
    position: static;
  }

  .nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .metrics,
  .two-column,
  .task-tile-board,
  .subject-schedule-grid {
    grid-template-columns: 1fr;
  }

  .wide-panel {
    grid-column: auto;
  }

  .landing-panel {
    grid-template-columns: 1fr;
  }

  .landing-copy h1 {
    font-size: 42px;
  }
}

@media (max-width: 560px) {
  .shell,
  .sidebar {
    padding: 18px;
  }

  .topbar,
  .item-top,
  .board-header,
  .week-schedule-header,
  .schedule-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .week-picker {
    width: 100%;
  }

  .nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}