:root {
  --bg: #f7f6f4;
  --surface: #ffffff;
  --surface-2: #fafafa;
  --ink: #191919;
  --muted: #6b7280;
  --line: #e8e3dd;
  --orange: #e95517;
  --orange-text: #a84d25;
  --orange-soft: #fff4ed;
  --green: #16845b;
  --red: #d1432f;
  --shadow: 0 8px 22px rgba(40, 30, 20, 0.045);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #fbfaf8 0%, var(--bg) 100%);
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.app {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 18px 0 48px;
}

.sidebar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  padding: 10px 0 16px;
  background: rgba(247, 246, 244, 0.94);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  min-width: 220px;
}

.brand-badge {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  color: #fff;
  background: var(--orange);
  font-weight: 900;
}

.brand strong {
  display: block;
  font-size: 20px;
  line-height: 1;
}

.brand span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.nav {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.nav button {
  min-height: 38px;
  padding: 0 16px;
  border-radius: 9px;
  color: var(--muted);
  background: transparent;
  font-size: 14px;
  font-weight: 800;
}

.nav button.active {
  color: var(--ink);
  background: #f2f4f6;
}

.main {
  min-width: 0;
}

.top {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
  margin: 18px 0 16px;
}

.kicker {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.08;
  letter-spacing: 0;
}

.muted {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.date-pill,
.pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 11px;
  border-radius: 999px;
  color: var(--muted);
  background: var(--surface);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.metric,
.panel,
.form,
.table {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.metric {
  padding: 14px;
}

.metric span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.metric strong {
  display: block;
  margin-top: 9px;
  font-size: 26px;
  line-height: 1;
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 14px;
}

.panel {
  overflow: hidden;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.panel-head h2 {
  font-size: 18px;
}

.panel-body {
  display: grid;
  gap: 8px;
  padding: 12px;
}

.lesson,
.row {
  display: grid;
  gap: 8px;
  padding: 12px;
  border-radius: 10px;
  background: var(--surface-2);
}

.lesson {
  grid-template-columns: 74px minmax(0, 1fr);
  align-items: start;
}

.time {
  display: grid;
  place-items: center;
  min-height: 52px;
  border-radius: 10px;
  color: var(--orange-text);
  background: var(--orange-soft);
  font-size: 18px;
  font-weight: 900;
}

.strong {
  color: var(--ink);
  font-weight: 900;
}

.status {
  color: var(--green);
  font-weight: 800;
}

.danger {
  color: var(--red);
  font-weight: 800;
}

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

.attendance-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.attendance-row {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.attendance-row span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
}

.btn {
  min-height: 36px;
  padding: 0 13px;
  border-radius: 10px;
  color: #fff;
  background: var(--ink);
  font-size: 14px;
  font-weight: 850;
}

.btn.subtle {
  color: var(--orange-text);
  background: var(--orange-soft);
}

.btn.subtle.selected {
  color: #fff;
  background: var(--orange);
}

.btn.good {
  background: var(--green);
}

.btn.warn {
  background: var(--red);
}

.form {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) auto;
  gap: 8px;
  padding: 10px;
  margin-bottom: 12px;
}

input,
select {
  min-height: 42px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0 12px;
  color: var(--ink);
  background: #f8f9fa;
  outline: none;
}

input:focus,
select:focus {
  border-color: #d6c3b7;
  background: #fff;
}

.table {
  overflow: hidden;
}

.thead,
.tr {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr 0.8fr 1fr;
  gap: 12px;
  align-items: center;
  padding: 13px 16px;
}

.thead {
  color: var(--muted);
  background: #fbfbfc;
  font-size: 12px;
  font-weight: 900;
}

.tr {
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.tr:hover {
  background: #fcfcfd;
}

.tr strong {
  line-height: 1.35;
}

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

@media (max-width: 860px) {
  .app {
    width: min(100vw - 16px, 1180px);
    padding: 8px 0 28px;
  }

  .sidebar {
    display: grid;
    gap: 10px;
    padding: 6px 0 10px;
  }

  .brand {
    min-width: 0;
  }

  .brand-badge {
    width: 34px;
    height: 34px;
    border-radius: 10px;
  }

  .brand strong {
    font-size: 18px;
  }

  .brand span,
  .kicker,
  .date-pill,
  .top .muted {
    display: none;
  }

  .nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3px;
    width: 100%;
  }

  .nav button {
    min-width: 0;
    min-height: 36px;
    padding: 0 8px;
    font-size: 13px;
  }

  .top {
    display: block;
    margin: 8px 0 12px;
  }

  h1 {
    font-size: 28px;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 10px;
  }

  .metric {
    padding: 11px 12px;
  }

  .metric span {
    font-size: 12px;
  }

  .metric strong {
    margin-top: 5px;
    font-size: 23px;
  }

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

  .panel-head {
    padding: 13px 14px;
  }

  .panel-head h2 {
    font-size: 17px;
  }

  .panel-body {
    padding: 8px;
  }

  .lesson {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 8px;
    padding: 9px;
  }

  .time {
    min-height: 44px;
    font-size: 16px;
  }

  .attendance-list {
    gap: 6px;
    margin-top: 7px;
  }

  .attendance-row {
    grid-template-columns: 1fr;
    gap: 7px;
    padding: 8px;
  }

  .attendance-row .actions {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 5px;
  }

  .btn {
    min-height: 34px;
    padding: 0 8px;
    font-size: 13px;
  }

  .row {
    padding: 10px;
  }

  .form,
  .thead,
  .tr {
    grid-template-columns: 1fr;
  }

  .form {
    gap: 7px;
    padding: 8px;
  }

  .thead {
    display: none;
  }

  .tr {
    gap: 6px;
    margin-bottom: 8px;
    padding: 11px 12px;
    border-top: 0;
    border-radius: 10px;
    background: var(--surface-2);
  }
}