:root {
  --admin-sidebar: 264px;
  --admin-navy: #111b2d;
  --admin-navy-soft: #1b2940;
  --admin-brand: #5b43d6;
  --admin-bg: #f3f5f9;
  --admin-panel: #ffffff;
  --admin-line: #dce2ea;
  --admin-text: #18212f;
  --admin-muted: #687386;
  --admin-green: #16805a;
  --admin-red: #b73737;
  --admin-yellow: #9a6813;
}

[hidden] { display: none !important; }
html, body { width: 100%; min-height: 100%; margin: 0; overflow-x: hidden; }
body { padding: 0; background: var(--admin-bg); color: var(--admin-text); }
button, .admin-button, .button, input, select { min-height: 44px; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid rgba(91, 67, 214, .25);
  outline-offset: 2px;
}
.admin-root { min-height: 100vh; min-height: 100dvh; }
.admin-muted { color: var(--admin-muted); line-height: 1.5; }
.admin-eyebrow { margin: 0 0 5px; color: var(--admin-brand); font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.admin-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--admin-text);
  background: white;
  font: inherit;
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
}
.admin-primary { color: white; border-color: var(--admin-brand); background: var(--admin-brand); }
.admin-secondary { border-color: var(--admin-line); background: white; }
.admin-full { width: 100%; }

.admin-login {
  width: min(440px, calc(100% - 32px));
  margin: clamp(48px, 13vh, 120px) auto;
  padding: 32px;
  border: 1px solid var(--admin-line);
  border-radius: 20px;
  background: var(--admin-panel);
  box-shadow: 0 18px 50px rgba(24, 33, 47, .12);
}
.admin-login-brand, .admin-brand-mark, .admin-header-logo {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: white;
  background: linear-gradient(145deg, #765ee7, #4430b3);
  font-weight: 900;
}
.admin-login-brand { width: 48px; height: 48px; margin-bottom: 22px; border-radius: 14px; }
.admin-login h1 { margin: 0 0 8px; font-size: clamp(27px, 5vw, 36px); }
.admin-login form { margin-top: 24px; }
.admin-login label { display: block; margin-bottom: 7px; font-size: 13px; font-weight: 750; }
.admin-login input { width: 100%; margin-bottom: 14px; padding: 10px 12px; border: 1px solid #bdc7d4; border-radius: 10px; }
.admin-form-error { min-height: 20px; margin: 10px 0 0; color: var(--admin-red); font-size: 13px; }

.admin-shell { min-height: 100vh; min-height: 100dvh; }
.admin-sidebar {
  position: fixed;
  z-index: 40;
  inset: 0 auto 0 0;
  display: flex;
  width: var(--admin-sidebar);
  min-width: 0;
  max-height: none;
  padding: max(22px, env(safe-area-inset-top)) 16px max(18px, env(safe-area-inset-bottom));
  overflow-y: auto;
  border: 0;
  border-radius: 0;
  background: var(--admin-navy);
  box-shadow: 8px 0 28px rgba(17, 27, 45, .12);
  flex-direction: column;
}
.admin-brand { display: flex; align-items: center; gap: 12px; min-width: 0; padding: 0 8px 24px; color: white; }
.admin-brand-mark { width: 42px; height: 42px; border-radius: 12px; }
.admin-brand span:last-child { min-width: 0; }
.admin-brand strong, .admin-brand small { display: block; }
.admin-brand small { margin-top: 3px; color: #99a8bd; font-size: 11px; }
.admin-nav { display: grid; gap: 6px; }
.admin-nav a, .admin-logout {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 0;
  border-radius: 10px;
  color: #bcc8d9;
  background: transparent;
  font-weight: 700;
  text-align: left;
  text-decoration: none;
}
.admin-nav a span, .admin-logout span { width: 22px; color: #8fa0b7; font-size: 19px; text-align: center; }
.admin-nav a:hover, .admin-nav a.active, .admin-logout:hover { color: white; background: var(--admin-navy-soft); }
.admin-nav a.active { box-shadow: inset 3px 0 var(--admin-brand); }
.admin-logout { margin-top: auto; cursor: pointer; }
.admin-stage { min-width: 0; min-height: 100vh; margin-left: var(--admin-sidebar); }
.admin-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 76px;
  padding: 12px max(24px, env(safe-area-inset-right)) 12px max(24px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--admin-line);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(12px);
}
.admin-header-title { display: flex; align-items: center; min-width: 0; gap: 12px; }
.admin-header-title h1 { margin: 0; overflow-wrap: anywhere; font-size: clamp(20px, 2vw, 26px); }
.admin-header-logo { display: none; width: 40px; height: 40px; border-radius: 11px; }
.admin-menu-toggle { display: none; width: 44px; padding: 0; border: 1px solid var(--admin-line); border-radius: 10px; background: white; font-size: 22px; }
.admin-api-status { display: inline-flex; align-items: center; gap: 8px; flex: 0 0 auto; color: var(--admin-muted); font-size: 13px; font-weight: 750; }
.admin-api-status span { width: 9px; height: 9px; border-radius: 50%; background: #98a3b2; }
.admin-api-status.ok { color: var(--admin-green); }
.admin-api-status.ok span { background: var(--admin-green); box-shadow: 0 0 0 4px rgba(22, 128, 90, .11); }
.admin-api-status.error { color: var(--admin-red); }
.admin-api-status.error span { background: var(--admin-red); }
.admin-content { width: min(1680px, 100%); min-width: 0; margin: 0 auto; padding: 26px 28px max(36px, env(safe-area-inset-bottom)); }
.admin-module { min-width: 0; }
.admin-module-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.admin-module-heading h2 { margin: 0 0 5px; font-size: clamp(24px, 2.5vw, 32px); }
.admin-module-heading p:last-child { margin-bottom: 0; }
.module-actions, .admin-quick-actions { display: flex; flex-wrap: wrap; gap: 9px; }
.admin-shell-notice { margin: 18px 28px 0; padding: 12px 14px; border: 1px solid #efb7b3; border-radius: 11px; color: var(--admin-red); background: #fff0ef; }

.admin-summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.admin-summary-card, .admin-card, .admin-system-card { min-width: 0; border: 1px solid var(--admin-line); border-radius: 15px; background: var(--admin-panel); box-shadow: 0 7px 24px rgba(24, 33, 47, .045); }
.admin-summary-card { padding: 18px; border-top: 3px solid #c9d1dc; }
.admin-summary-card strong { display: block; overflow-wrap: anywhere; font-size: clamp(20px, 2.1vw, 29px); letter-spacing: -.035em; }
.admin-summary-card span { display: block; margin-top: 7px; color: var(--admin-muted); font-size: 13px; }
.admin-summary-card.ok { border-top-color: var(--admin-green); }
.admin-summary-card.warning, .admin-summary-card.watch { border-top-color: var(--admin-yellow); }
.admin-summary-card.error, .admin-summary-card.blocked { border-top-color: var(--admin-red); }
.admin-quick-card { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 18px; padding: 20px; }
.admin-quick-card h2 { margin: 0; }
.admin-system-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.admin-system-card { padding: 19px; }
.admin-system-card span { display: block; margin-bottom: 7px; color: var(--admin-muted); font-size: 13px; }
.admin-system-card strong { display: block; overflow-wrap: anywhere; font-size: 20px; }
.state-ok { color: var(--admin-green); }
.state-error { color: var(--admin-red); }
.state-degraded, .state-unknown { color: var(--admin-yellow); }

.usage-dashboard { display: grid; gap: 22px; }
.knowledge-module .workspace { min-width: 0; }
.knowledge-module .sidebar { position: static; transform: none; box-shadow: 0 3px 16px rgba(30, 42, 60, .04); }
.knowledge-module .toolbar, .knowledge-module .workspace { width: 100%; }
.knowledge-module .topbar { margin: 0; }
.knowledge-heading { align-items: center; }
.table-wrap { max-width: 100%; }

.admin-sidebar-overlay { display: none; }

@media (max-width: 1180px) {
  .admin-summary-grid, .admin-system-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .admin-sidebar {
    width: min(82vw, 304px);
    padding-left: max(14px, env(safe-area-inset-left));
    transform: translateX(-105%);
    transition: transform .2s ease;
  }
  .admin-sidebar.open { transform: translateX(0); }
  .admin-sidebar-overlay { position: fixed; z-index: 35; inset: 0; display: block; background: rgba(8, 15, 27, .52); }
  .admin-stage { margin-left: 0; }
  .admin-header {
    min-height: 70px;
    padding: max(10px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) 10px max(12px, env(safe-area-inset-left));
  }
  .admin-menu-toggle, .admin-header-logo { display: grid; place-items: center; }
  .admin-header-logo { display: none; }
  .admin-header-title { flex: 1; }
  .admin-header-title .admin-eyebrow { display: none; }
  .admin-header-title h1 { font-size: 19px; }
  .admin-api-status { font-size: 0; }
  .admin-api-status span { width: 11px; height: 11px; }
  .admin-content { padding: 18px max(12px, env(safe-area-inset-right)) max(28px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); }
  .admin-shell-notice { margin: 12px max(12px, env(safe-area-inset-right)) 0 max(12px, env(safe-area-inset-left)); }
  .admin-module-heading { display: block; }
  .admin-module-heading > button, .admin-module-heading .actions, .admin-module-heading .module-actions { margin-top: 14px; }
  .admin-module-heading > button { width: 100%; }
  .admin-summary-grid, .admin-system-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .admin-summary-card, .admin-system-card { padding: 14px 12px; }
  .admin-summary-card strong, .admin-system-card strong { font-size: 19px; }
  .admin-quick-card { display: block; padding: 16px; }
  .admin-quick-actions { margin-top: 15px; }
  .admin-quick-actions > * { flex: 1 1 100%; }
  .knowledge-heading { display: block; }
  .knowledge-module .toolbar { grid-template-columns: minmax(0, 1fr); }
  .knowledge-module .toolbar input { grid-column: auto; }
  .knowledge-module .workspace { display: block; }
  .knowledge-module .sidebar, .knowledge-module .documents, .knowledge-module .editor { width: 100%; max-height: none; margin-bottom: 12px; }
  .knowledge-module .content-editor { min-height: 48vh; }
  .usage-dashboard .actions { width: 100%; }
  .usage-dashboard .period-tabs { min-width: 0; }
  .usage-dashboard .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
}

@media (max-width: 390px) {
  .admin-login { width: calc(100% - 24px); padding: 25px 20px; }
  .admin-summary-grid, .admin-system-grid { grid-template-columns: minmax(0, 1fr); }
}