/* 수업 앱 현황판 — 색은 역할 토큰으로만 쓴다 (밝은/어두운 화면 각각 고른 값) */
:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f3f2ee;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #6f6d68;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --accent: #2a78d6;
  --s1: #2a78d6;
  --s2: #eb6834;
  --s3: #1baf7a;
  --s4: #eda100;
  --s5: #e87ba4;
  --s6: #008300;
  --s7: #4a3aa7;
  --s8: #e34948;
  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
  --good-ink: #006300;
  --critical-ink: #b42323;
  --q0: #eeede8;
  --q1: #cde2fb;
  --q2: #9ec5f4;
  --q3: #6da7ec;
  --q4: #3987e5;
  --q5: #256abf;
  --q6: #184f95;
  --q7: #0d366b;
  --f1: #86b6ef;
  --f2: #5598e7;
  --f3: #2a78d6;
  --f4: #1c5cab;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #232321;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #9a9890;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.1);
    --accent: #5598e7;
    --s1: #3987e5;
    --s2: #d95926;
    --s3: #199e70;
    --s4: #c98500;
    --s5: #d55181;
    --s6: #008300;
    --s7: #9085e9;
    --s8: #e66767;
    --good-ink: #0ca30c;
    --critical-ink: #e66767;
    --q0: #232321;
    --q1: #0d366b;
    --q2: #104281;
    --q3: #184f95;
    --q4: #1c5cab;
    --q5: #2a78d6;
    --q6: #5598e7;
    --q7: #9ec5f4;
    --f1: #184f95;
    --f2: #1c5cab;
    --f3: #2a78d6;
    --f4: #5598e7;
  }
}
:root[data-theme='dark'] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #232321;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #9a9890;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.1);
  --accent: #5598e7;
  --s1: #3987e5;
  --s2: #d95926;
  --s3: #199e70;
  --s4: #c98500;
  --s5: #d55181;
  --s6: #008300;
  --s7: #9085e9;
  --s8: #e66767;
  --good-ink: #0ca30c;
  --critical-ink: #e66767;
  --q0: #232321;
  --q1: #0d366b;
  --q2: #104281;
  --q3: #184f95;
  --q4: #1c5cab;
  --q5: #2a78d6;
  --q6: #5598e7;
  --q7: #9ec5f4;
  --f1: #184f95;
  --f2: #1c5cab;
  --f3: #2a78d6;
  --f4: #5598e7;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 15px/1.5 system-ui, -apple-system, 'Segoe UI', 'Malgun Gothic', sans-serif;
}
button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}
a {
  color: var(--accent);
}
.boot {
  padding: 40px 16px;
  color: var(--muted);
}

/* ---------- 머리 ---------- */
header.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--page);
  border-bottom: 1px solid var(--border);
}
.top-row {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 10px 16px 0;
}
.top-row h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 700;
}
.top-row .grow {
  flex: 1;
}
.top-row .when {
  color: var(--muted);
  font-size: 13px;
}
nav.tabs {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  max-width: 1240px;
  margin: 0 auto;
  padding: 6px 12px 0;
  scrollbar-width: none;
}
nav.tabs button {
  border: 0;
  background: transparent;
  padding: 8px 12px 10px;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  color: var(--ink-2);
  font-weight: 600;
}
nav.tabs button[aria-selected='true'] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}
main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 16px 16px 60px;
}

/* ---------- 공통 ---------- */
.btn {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-weight: 600;
}
.btn:hover {
  background: var(--surface-2);
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.small {
  padding: 2px 8px;
  font-size: 13px;
}
.btn:disabled {
  opacity: 0.45;
  cursor: default;
}
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
}
.seg {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface);
}
.seg button {
  border: 0;
  background: transparent;
  padding: 5px 12px;
  cursor: pointer;
  font-weight: 600;
  color: var(--ink-2);
}
.seg button[aria-pressed='true'] {
  background: var(--surface-2);
  color: var(--ink);
  box-shadow: inset 0 -2px 0 var(--accent);
}
.grid {
  display: grid;
  gap: 14px;
}
.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 520px), 1fr));
}
.grid.three {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
}
.grid.tiles {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr));
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  min-width: 0;
}
.card h2,
.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}
.card h3 {
  font-size: 14px;
  color: var(--ink-2);
}
.card .sub {
  color: var(--muted);
  font-size: 13px;
  margin: -4px 0 10px;
}
section + section {
  margin-top: 18px;
}
.section-title {
  font-size: 15px;
  font-weight: 700;
  margin: 22px 0 8px;
}
.muted {
  color: var(--muted);
}
.small {
  font-size: 13px;
}
.empty {
  color: var(--muted);
  font-size: 14px;
  padding: 10px 0;
}
.num {
  font-variant-numeric: tabular-nums;
}
.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: 0;
}
.key {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  margin-right: 6px;
  vertical-align: -1px;
}

/* ---------- 숫자 타일 ---------- */
.tile .label {
  color: var(--ink-2);
  font-size: 13px;
}
.tile .value {
  font-size: 28px;
  font-weight: 650;
  line-height: 1.2;
  margin-top: 2px;
}
.tile .value.hero {
  font-size: 48px;
}
.tile .note {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

/* ---------- 앱 카드 ---------- */
.appcard .head {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.appcard .head h2 {
  margin: 0;
  font-size: 17px;
}
.appcard .head .grow {
  flex: 1;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-radius: 99px;
  padding: 2px 10px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.signal {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  background: var(--surface-2);
  margin-bottom: 10px;
  font-weight: 600;
}
.signal .lamp {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex: none;
  box-shadow: 0 0 0 3px var(--surface);
}
.kv {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 8px 12px;
  margin: 8px 0;
}
.kv div span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}
.kv div b {
  font-weight: 650;
  font-size: 16px;
}
.meter {
  margin: 6px 0 2px;
}
.meter .track {
  height: 10px;
  border-radius: 99px;
  background: var(--q1);
  overflow: hidden;
}
.meter .fill {
  height: 100%;
  border-radius: 99px;
  background: var(--accent);
}
.meter .fill.warn {
  background: var(--warning);
}
.meter .fill.bad {
  background: var(--critical);
}
.meter .cap {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ink-2);
  margin-bottom: 4px;
}

/* ---------- 표 ---------- */
.table-wrap {
  overflow-x: auto;
  margin: 0 -4px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th,
td {
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--grid);
  white-space: nowrap;
}
th {
  color: var(--ink-2);
  font-weight: 600;
  font-size: 13px;
}
td.r,
th.r {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
td.wrap {
  white-space: normal;
  min-width: 200px;
}
tr.dim td {
  color: var(--muted);
}
details.tableview {
  margin-top: 8px;
}
details.tableview summary {
  cursor: pointer;
  color: var(--ink-2);
  font-size: 13px;
}

/* ---------- 차트 ---------- */
.chart {
  position: relative;
  width: 100%;
}
.chart svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}
.chart text {
  fill: var(--muted);
  font-size: 11px;
  font-family: inherit;
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  font-size: 13px;
  color: var(--ink-2);
  margin: 0 0 8px;
}
.legend span {
  display: inline-flex;
  align-items: center;
}
#tip {
  position: fixed;
  z-index: 100;
  pointer-events: none;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
  max-width: 280px;
}
#tip .t {
  font-weight: 700;
  margin-bottom: 4px;
}
#tip .row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
}
#tip .row span:first-child {
  display: inline-flex;
  align-items: center;
}
.hbars {
  display: grid;
  grid-template-columns: minmax(80px, max-content) 1fr auto;
  gap: 6px 10px;
  align-items: center;
  font-size: 14px;
}
.hbars .bar {
  height: 14px;
  border-radius: 0 4px 4px 0;
  min-width: 2px;
}
.hbars .val {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
}
.funnel .step {
  display: grid;
  grid-template-columns: 120px 1fr 90px;
  gap: 10px;
  align-items: center;
  margin: 6px 0;
}
.funnel .step .bar {
  height: 22px;
  border-radius: 0 4px 4px 0;
  min-width: 2px;
}
.funnel .step .val {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.heat {
  border-collapse: separate;
  border-spacing: 2px;
  width: auto;
}
.heat td {
  width: 34px;
  height: 26px;
  padding: 0;
  text-align: center;
  font-size: 11px;
  border: 0;
  border-radius: 4px;
}
.heat th {
  font-size: 11px;
  padding: 0 6px 0 0;
  border: 0;
  text-align: right;
}
.heat thead th {
  text-align: center;
  padding: 0 0 4px;
}

/* ---------- 상태 ---------- */
.status-good {
  color: var(--good-ink);
}
.status-bad {
  color: var(--critical-ink);
}
.notice-box {
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  display: flex;
  gap: 10px;
  align-items: center;
}
.notice-box .grow {
  flex: 1;
}
form.stack {
  display: grid;
  gap: 10px;
  max-width: 560px;
}
form.stack label {
  display: grid;
  gap: 4px;
  font-size: 14px;
  color: var(--ink-2);
}
form.stack input[type='text'],
form.stack input[type='password'],
form.stack input[type='number'],
form.stack select,
form.stack textarea {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  background: var(--page);
}
.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}
.checks label {
  display: inline-flex !important;
  align-items: center;
  gap: 6px;
  color: var(--ink) !important;
}
.err {
  color: var(--critical-ink);
  font-size: 14px;
}
.ok {
  color: var(--good-ink);
  font-size: 14px;
}
.login {
  max-width: 380px;
  margin: 12vh auto;
  padding: 0 16px;
}
code {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 13px;
  background: var(--surface-2);
  padding: 1px 5px;
  border-radius: 4px;
}
@media (max-width: 600px) {
  .tile .value.hero {
    font-size: 40px;
  }
  .funnel .step {
    grid-template-columns: 90px 1fr 70px;
  }
}

/* 탭 안의 큰 덩어리 사이 간격 */
#view > * + * {
  margin-top: 14px;
}