:root {
  --bg: #f4f7fb;
  --ink: #152033;
  --muted: #617084;
  --line: #d9e1ec;
  --panel: #ffffff;
  --panel-soft: #eef5f2;
  --accent: #0f766e;
  --accent-2: #2563eb;
  --warn: #b45309;
  --danger: #b91c1c;
  --ok: #15803d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(15, 118, 110, 0.08), rgba(37, 99, 235, 0.04) 34%, transparent 68%),
    var(--bg);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1240px, calc(100% - 28px));
  margin: 0 auto;
  padding: 22px 0 36px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 5px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(31px, 5vw, 54px);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 21px;
  letter-spacing: 0;
}

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

.icon-button {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font-weight: 700;
}

.icon-button:hover,
.tab:hover,
.primary:hover {
  filter: brightness(0.97);
}

.file-button input {
  display: none;
}

.danger {
  color: var(--danger);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.metric,
.today-band,
.panel,
.form-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 14px 34px rgba(21, 32, 51, 0.06);
}

.metric {
  min-height: 92px;
  padding: 16px;
}

.metric-label {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 32px;
  line-height: 1;
}

.today-band {
  display: grid;
  grid-template-columns: minmax(190px, 280px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 18px;
  margin-bottom: 14px;
  background: linear-gradient(135deg, #ffffff, #eef7f5);
}

.priority-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.priority-card,
.item,
.course-card,
.schedule-block,
.empty {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.priority-card {
  min-height: 124px;
  padding: 13px;
}

.priority-card strong,
.item strong,
.course-card strong {
  display: block;
  margin-bottom: 5px;
}

.muted {
  color: var(--muted);
  font-size: 13px;
}

.tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 12px;
}

.tab {
  flex: 0 0 auto;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 16px;
  background: #fff;
  color: var(--ink);
}

.tab.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.main-grid,
.workspace {
  display: grid;
  grid-template-columns: minmax(280px, 390px) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.main-grid {
  grid-template-columns: 1fr 1fr;
}

.panel,
.form-panel {
  padding: 16px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 999px;
  padding: 0 10px;
  background: var(--panel-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.badge.warn {
  background: #fff7ed;
  color: var(--warn);
}

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

.item {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
  padding: 12px;
}

.item::before,
.course-dot {
  content: "";
  width: 10px;
  height: 10px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--accent-2);
}

.item-actions {
  display: flex;
  gap: 6px;
}

.mini-button {
  min-width: 34px;
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.mini-button.ok {
  color: var(--ok);
}

.mini-button.delete {
  color: var(--danger);
}

.form-panel {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

input,
select {
  min-height: 40px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 10px;
  color: var(--ink);
  background: #fff;
}

input:focus,
select:focus,
button:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.22);
  outline-offset: 2px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.primary {
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.course-card {
  padding: 13px;
}

.course-top {
  display: flex;
  align-items: center;
  gap: 8px;
}

.progress {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #e5edf7;
  margin-top: 10px;
}

.progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
}

.schedule-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(120px, 1fr));
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.day-column {
  min-width: 120px;
}

.day-title {
  margin-bottom: 8px;
  color: var(--muted);
  font-weight: 700;
  font-size: 13px;
}

.schedule-block {
  padding: 10px;
  margin-bottom: 8px;
  border-left: 5px solid var(--accent-2);
}

.schedule-block.conflict {
  border-color: var(--danger);
  background: #fff1f2;
}

.empty {
  padding: 16px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 860px) {
  .topbar,
  .today-band,
  .main-grid,
  .workspace {
    grid-template-columns: 1fr;
  }

  .topbar {
    display: grid;
  }

  .summary-grid,
  .priority-list,
  .course-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 540px) {
  .summary-grid,
  .priority-list,
  .course-grid,
  .form-row {
    grid-template-columns: 1fr;
  }

  .item {
    grid-template-columns: 10px minmax(0, 1fr);
  }

  .item-actions {
    grid-column: 2;
  }
}