:root {
  --ink: #0d1728;
  --muted: #4b5a70;
  --line: #ccd7e5;
  --paper: #ffffff;
  --base: #f3f6fb;
  --brand: #087783;
  --brand-dark: #07565f;
  --accent: #e45d4f;
  font-family: "Malgun Gothic", "맑은 고딕", "Noto Sans KR", Arial, sans-serif;
  color: var(--ink);
  background: var(--base);
  text-rendering: auto;
  -webkit-font-smoothing: subpixel-antialiased;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
}

body {
  margin: 0;
  background: var(--base);
}

body.admin-page {
  overflow: hidden;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.ready-shell,
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.ready-shell h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 700;
  letter-spacing: 0;
}

.login-box {
  width: min(372px, 100%);
  display: grid;
  gap: 14px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.login-box h1 {
  margin: 0 0 6px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0;
}

.login-box label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.login-box input {
  width: 100%;
  min-height: 44px;
  border: 1px solid #bdcadd;
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  background: #fff;
}

.login-box button,
.side-menu,
.app-tab {
  min-height: 42px;
  border: 1px solid var(--brand);
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
}

.login-box button:hover,
.side-menu:hover {
  background: var(--brand-dark);
}

.error-text {
  margin: 0;
  color: #b42318;
  font-size: 14px;
  font-weight: 700;
}

.admin-layout {
  height: 100vh;
  min-height: 0;
  display: grid;
  grid-template-columns: 228px minmax(0, 1fr);
  overflow: hidden;
}

.sidebar {
  min-width: 0;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 22px;
  padding: 22px 18px;
  border-right: 1px solid var(--line);
  background: #fbfcfe;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark span {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0;
}

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

.side-menu {
  width: 100%;
  text-align: left;
  padding: 0 14px;
}

.logout-link {
  align-self: end;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.logout-link:hover {
  color: var(--accent);
}

.admin-main {
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 14px;
  padding: 18px 22px;
  overflow: hidden;
}

.admin-topbar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 42px;
}

.app-tabs {
  display: flex;
  gap: 8px;
}

.app-tab {
  min-width: 78px;
  padding: 0 18px;
  background: #ecf7f6;
  color: var(--brand-dark);
}

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

.app-tab:disabled {
  color: #7d8da4;
  background: #f4f7fb;
  cursor: not-allowed;
  opacity: .9;
}

.app-frame {
  width: 100%;
  height: 100%;
  min-height: 0;
  border: 0;
  background: transparent;
}

@media (max-width: 860px) {
  .admin-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    grid-template-rows: auto auto auto;
    gap: 14px;
    padding: 18px;
  }

  .admin-main {
    padding: 16px;
  }

  .app-frame {
    height: 82vh;
  }
}