:root {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-muted: #f0f2f5;
  --color-line: #e2e5e9;
  --color-line-strong: #c9ced6;
  --color-text: #16181d;
  --color-text-muted: #5b6270;
  --color-accent: #1f5fbf;
  --color-accent-strong: #174a96;
  --color-on-accent: #ffffff;
  --color-danger: #b42318;
  --color-danger-line: #e9c3bf;
  --color-danger-bg: #fbeceb;
  --color-success: #1d7a46;
  --color-side-bg: #15171a;
  --color-side-active: #272b31;
  --color-side-text: #c4c8ce;
  --color-side-text-strong: #ffffff;
  --color-side-focus: #8fb4ff;

  --font-sans: "Pretendard Variable", Pretendard, "Apple SD Gothic Neo", "Malgun Gothic", "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
  --text-xs: 12px;
  --text-sm: 13px;
  --text-md: 15px;
  --text-lg: 18px;
  --text-xl: 24px;
  --text-score: 32px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --radius-1: 4px;
  --radius-2: 6px;
  --radius-3: 8px;
  --side-width: 232px;
  --content-max: 1120px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { background: var(--color-bg); }
body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: var(--text-xl); line-height: 1.3; }
h2 { font-size: var(--text-lg); line-height: 1.4; }
h3 { font-size: var(--text-md); line-height: 1.5; }
p { margin: 0; }
ul { margin: 0; padding: 0; }
code { font-family: var(--font-mono); font-size: 0.92em; }
a { color: var(--color-accent); }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -48px;
  z-index: 10;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-2);
  background: var(--color-surface);
  color: var(--color-text);
}
.skip-link:focus { top: var(--space-4); }

.muted { color: var(--color-text-muted); }
.small { font-size: var(--text-sm); line-height: 1.5; }
.num { font-variant-numeric: tabular-nums; }

/* Layout */

.app {
  display: grid;
  grid-template-columns: var(--side-width) minmax(0, 1fr);
  min-height: 100vh;
}

.side {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
  padding: var(--space-6) var(--space-4);
  background: var(--color-side-bg);
  color: var(--color-side-text);
}
.side :focus-visible { outline-color: var(--color-side-focus); }

.brand {
  margin: 0 var(--space-3) var(--space-6);
  color: var(--color-side-text-strong);
  font-size: var(--text-md);
  font-weight: 700;
}

.nav-list, .submenu { list-style: none; display: grid; gap: var(--space-1); }
.submenu { margin-top: var(--space-1); padding-left: var(--space-3); }

.side button {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 0;
  border-radius: var(--radius-2);
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.side button:hover { color: var(--color-side-text-strong); }
.side button[aria-current="page"] {
  background: var(--color-side-active);
  color: var(--color-side-text-strong);
  font-weight: 600;
}
.submenu button { font-size: var(--text-sm); }

.side .lang-toggle {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-side-active);
  border-radius: 0;
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

.nav-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-group::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 120ms ease;
}
.nav-group[aria-expanded="true"]::after { transform: rotate(45deg); }

.content {
  width: 100%;
  max-width: var(--content-max);
  padding: var(--space-7) var(--space-6);
}
.content:focus { outline: none; }

.page-head { display: grid; gap: var(--space-2); margin-bottom: var(--space-6); }
.page-head p { max-width: 44rem; }

.stack { display: grid; gap: var(--space-5); }
.result { margin-top: var(--space-6); }
.nav-title { margin-bottom: var(--space-2); color: var(--color-text-muted); font-size: var(--text-sm); }
.nav-after { margin-top: var(--space-4); }

/* Sections */

.section {
  display: grid;
  align-content: start;
  gap: var(--space-4);
  padding: var(--space-5);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-3);
  background: var(--color-surface);
}
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
}
.section-danger { border-color: var(--color-danger-line); }

.doc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}
.doc-grid .section { align-content: start; }
.doc-text { white-space: pre-line; }
.doc-list { display: grid; gap: var(--space-1); padding-left: var(--space-5); }

/* Controls */

.field { display: grid; gap: var(--space-1); }
.field label { font-size: var(--text-sm); font-weight: 600; }
.field .hint { font-size: var(--text-sm); color: var(--color-text-muted); }

input[type="text"], input[type="url"], input[type="search"], input[type="password"] {
  width: 100%;
  min-height: 40px;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-2);
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
}
input::placeholder { color: var(--color-text-muted); }

.inline-form {
  display: flex;
  gap: var(--space-2);
  max-width: 44rem;
}
.inline-form input { flex: 1; }

.form-grid { display: grid; gap: var(--space-3); max-width: 24rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-2);
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}
.button:hover { background: var(--color-surface-muted); }
.button-primary { border-color: var(--color-accent); background: var(--color-accent); color: var(--color-on-accent); }
.button-primary:hover { border-color: var(--color-accent-strong); background: var(--color-accent-strong); }
.button-danger { border-color: var(--color-danger); color: var(--color-danger); }
.button-danger:hover { background: var(--color-danger-bg); }
.button-dark { border-color: var(--color-side-bg); background: var(--color-side-bg); color: var(--color-on-accent); }
.button-dark:hover { background: var(--color-side-active); }
.button-small { min-height: 32px; padding: var(--space-1) var(--space-3); font-size: var(--text-sm); }
.button:disabled { opacity: 0.55; cursor: progress; }

.link-button {
  padding: 0;
  border: 0;
  background: none;
  color: var(--color-accent);
  font: inherit;
  text-align: left;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }

.tabs {
  display: flex;
  gap: var(--space-5);
  border-bottom: 1px solid var(--color-line);
}
.tabs button {
  padding: var(--space-2) 0;
  margin-bottom: -1px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--color-text-muted);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.tabs button[aria-pressed="true"] { border-bottom-color: var(--color-text); color: var(--color-text); }

/* Status */

.status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
}
.status:empty { display: none; }
.status-ok { color: var(--color-success); }
.status-fail { color: var(--color-danger); }
.status-busy { color: var(--color-text-muted); }
.status-busy::before {
  content: "";
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-line-strong);
  border-top-color: var(--color-text-muted);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .status-busy::before { animation: none; }
  .nav-group::after { transition: none; }
}

.tag {
  display: inline-block;
  padding: 0 var(--space-2);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-1);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: 20px;
  white-space: nowrap;
}

/* Tables */

.table-wrap { overflow-x: auto; border: 1px solid var(--color-line); border-radius: var(--radius-3); background: var(--color-surface); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: var(--space-3) var(--space-4); text-align: left; vertical-align: top; border-bottom: 1px solid var(--color-line); }
tbody tr:last-child td { border-bottom: 0; }
th {
  background: var(--color-surface-muted);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
}
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.score { font-weight: 700; }

.person { display: grid; gap: var(--space-1); justify-items: start; }

.features { list-style: none; display: grid; gap: var(--space-2); min-width: 16rem; }
.features li { display: grid; gap: 2px; }
.feature-meta { color: var(--color-text-muted); font-size: var(--text-sm); font-variant-numeric: tabular-nums; }
.feature-meta strong { color: var(--color-text); }

.evidence { display: grid; gap: 2px; min-width: 14rem; color: var(--color-text-muted); font-size: var(--text-sm); }

.review-box {
  display: grid;
  gap: var(--space-1);
  margin-top: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-left: 3px solid var(--color-danger);
  font-size: var(--text-sm);
}
.review-box ul { display: grid; gap: 2px; padding-left: var(--space-4); }
.review-title { color: var(--color-danger); font-weight: 600; }
.tag-review { border-color: var(--color-danger); color: var(--color-danger); }

.footnote { color: var(--color-text-muted); font-size: var(--text-sm); }

/* Lists */

.row-list { list-style: none; border-top: 1px solid var(--color-line); }
.row-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-line);
}
.row-list .row-main { display: grid; gap: 2px; min-width: 0; }
.row-list .row-title { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); font-weight: 600; overflow-wrap: anywhere; }

.project-nav { list-style: none; display: grid; gap: var(--space-1); }
.project-nav button {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid transparent;
  border-radius: var(--radius-2);
  background: none;
  color: var(--color-text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.project-nav button:hover { background: var(--color-surface-muted); }
.project-nav button[aria-current="true"] { border-color: var(--color-line-strong); background: var(--color-surface); font-weight: 600; }
.project-nav .num { color: var(--color-text-muted); }

.projects-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.score-summary { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-2) var(--space-4); }
.score-big { font-size: var(--text-score); line-height: 1.1; font-weight: 700; font-variant-numeric: tabular-nums; }

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}
.setting-text { display: grid; gap: var(--space-1); }
@media (max-width: 719px) {
  .setting-row { flex-direction: column; align-items: flex-start; }
}

.notice-box {
  display: grid;
  gap: var(--space-1);
  max-width: 44rem;
  padding: var(--space-3) var(--space-4);
  border-left: 3px solid var(--color-line-strong);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.choices { display: flex; flex-wrap: wrap; gap: var(--space-4); margin: 0; padding: 0; border: 0; }
.choices legend { width: 100%; margin-bottom: var(--space-2); padding: 0; }
.choice { display: inline-flex; align-items: center; gap: var(--space-2); cursor: pointer; }
.choice input { width: 16px; height: 16px; margin: 0; accent-color: var(--color-accent); }

.guide-details { margin-top: var(--space-6); }
.guide-details summary { margin-bottom: var(--space-4); font-weight: 700; cursor: pointer; }
.doc-grid .section h3 + .doc-list { margin-top: 0; }
.doc-grid .section .doc-list + h3 { margin-top: var(--space-2); }

.manual-add summary { color: var(--color-text-muted); cursor: pointer; }
.manual-add[open] summary { margin-bottom: var(--space-3); }

.login-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-5); max-width: 52rem; }

/* Responsive */

@media (max-width: 1023px) {
  :root { --side-width: 200px; }
  .projects-layout { grid-template-columns: minmax(0, 1fr); gap: var(--space-5); }
  .doc-grid { grid-template-columns: minmax(0, 1fr); }
  .content { padding: var(--space-6) var(--space-5); }
}

@media (max-width: 719px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .side {
    position: static;
    height: auto;
    padding: var(--space-4);
  }
  .brand { margin: 0 0 var(--space-3); }
  .nav-list { display: flex; flex-wrap: wrap; gap: var(--space-1); }
  .side button { width: auto; }
  .submenu { display: flex; flex-wrap: wrap; padding-left: 0; }
  #nav-manage { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-1); }
  .side .lang-toggle { margin-top: var(--space-3); align-self: flex-start; border-top: 0; padding-top: var(--space-2); }
  .content { padding: var(--space-5) var(--space-4); }
  .inline-form { flex-direction: column; }
  .login-grid { grid-template-columns: minmax(0, 1fr); }
  .section { padding: var(--space-4); }
}