/* base.css — reset, layout shell, typography */

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg-app);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: var(--fs-base);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
h1, h2, h3, h4, p, figure { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
svg { display: block; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 999px; border: 2px solid transparent; background-clip: content-box; }

/* ------------------------------- Shell ---------------------------------- */
#kd-app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  height: 100vh;
  transition: grid-template-columns var(--transition-med);
}
#kd-app.kd-sidebar-collapsed { grid-template-columns: var(--sidebar-w-collapsed) 1fr; }

.kd-sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}
.kd-sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-4);
  height: var(--topbar-h);
  flex: none;
  color: var(--sidebar-text);
  white-space: nowrap;
}
.kd-sidebar-brand .kd-mark {
  width: 26px; height: 26px; flex: none;
  border-radius: 7px;
  background: linear-gradient(145deg, var(--accent), hsl(var(--accent-h) 91% 40%));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 13px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08) inset;
}
.kd-sidebar-brand .kd-brand-text { display: flex; flex-direction: column; overflow: hidden; }
.kd-sidebar-brand .kd-brand-name { font-size: var(--fs-md); font-weight: 650; letter-spacing: 0.1px; overflow: hidden; text-overflow: ellipsis; }
.kd-sidebar-brand .kd-brand-tag { font-size: 10.5px; color: var(--sidebar-text-muted); text-transform: uppercase; letter-spacing: 0.08em; overflow: hidden; text-overflow: ellipsis; }

.kd-nav { flex: 1; overflow-y: auto; padding: var(--space-3) var(--space-2); }
.kd-nav-section { margin-bottom: var(--space-3); }
.kd-nav-label {
  font-size: 10.5px; font-weight: 650; text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--sidebar-text-label);
  padding: var(--space-2) var(--space-3) var(--space-1);
  white-space: nowrap;
}
.kd-nav-item {
  display: flex; align-items: center; gap: var(--space-3);
  padding: 8px var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--sidebar-text-item);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  font-size: var(--fs-base);
  font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.kd-nav-item:hover { background: var(--sidebar-hover-bg); color: var(--sidebar-text-item-hover); }
.kd-nav-item.active { background: var(--nav-color-soft, var(--accent-soft)); color: var(--sidebar-text-item-hover); }
.kd-nav-item.active::before {
  content: ""; position: absolute; left: -8px; top: 6px; bottom: 6px; width: 3px;
  border-radius: 0 3px 3px 0; background: var(--nav-color, var(--accent));
}
.kd-nav-item svg { flex: none; width: 18px; height: 18px; opacity: 0.9; color: var(--nav-color, currentColor); }
.kd-nav-item .kd-nav-label-text { overflow: hidden; text-overflow: ellipsis; }
.kd-nav-item .kd-nav-count {
  margin-left: auto; font-size: 10.5px; font-weight: 700; color: var(--sidebar-count-text);
  background: var(--sidebar-count-bg); padding: 1px 6px; border-radius: 999px;
}
#kd-app.kd-sidebar-collapsed .kd-brand-text,
#kd-app.kd-sidebar-collapsed .kd-nav-label,
#kd-app.kd-sidebar-collapsed .kd-nav-label-text,
#kd-app.kd-sidebar-collapsed .kd-nav-count,
#kd-app.kd-sidebar-collapsed .kd-sidebar-footer-text { display: none; }
#kd-app.kd-sidebar-collapsed .kd-nav-item { justify-content: center; }
#kd-app.kd-sidebar-collapsed .kd-nav-item.active::before { left: 0; }

.kd-sidebar-footer {
  flex: none; padding: var(--space-3); border-top: 1px solid var(--sidebar-border);
  display: flex; align-items: center; gap: var(--space-2); cursor: pointer;
  color: var(--sidebar-text-item);
}
.kd-sidebar-footer:hover { background: var(--sidebar-footer-hover-bg); }
.kd-sidebar-footer .kd-avatar { width: 26px; height: 26px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 11px; flex: none; }
.kd-sidebar-footer-text { display: flex; flex-direction: column; overflow: hidden; }
.kd-sidebar-footer-text b { font-size: var(--fs-sm); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kd-sidebar-footer-text span { font-size: 10.5px; color: var(--sidebar-text-muted); }

/* ------------------------------- Main ----------------------------------- */
.kd-main { display: flex; flex-direction: column; min-width: 0; height: 100vh; }
.kd-topbar {
  height: var(--topbar-h); flex: none;
  background: var(--bg-topbar);
  border-bottom: 1px solid var(--border-subtle);
  display: flex; align-items: center; gap: var(--space-3);
  padding: 0 var(--space-5);
}
.kd-topbar-title { display: flex; align-items: baseline; gap: var(--space-2); min-width: 0; }
.kd-topbar-title h1 { font-size: var(--fs-lg); font-weight: 650; white-space: nowrap; }
.kd-topbar-title .kd-crumb { color: var(--text-tertiary); font-size: var(--fs-sm); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.kd-collapse-btn {
  width: 30px; height: 30px; border-radius: var(--radius-sm); border: 1px solid var(--border-default);
  background: var(--bg-surface); color: var(--text-secondary); display: flex; align-items: center; justify-content: center; cursor: pointer; flex: none;
}
.kd-collapse-btn:hover { background: var(--bg-surface-hover); color: var(--text-primary); }
.kd-topbar-search {
  flex: 1; max-width: 460px; margin: 0 auto 0 var(--space-5);
  display: flex; align-items: center; gap: var(--space-2);
  background: var(--bg-inset); border: 1px solid var(--border-default);
  border-radius: var(--radius-md); padding: 7px var(--space-3);
  color: var(--text-tertiary); cursor: pointer;
}
.kd-topbar-search:hover { border-color: var(--border-strong); }
.kd-topbar-search kbd {
  margin-left: auto; font-family: var(--font-mono); font-size: 10.5px; background: var(--bg-surface-raised);
  border: 1px solid var(--border-default); border-radius: 4px; padding: 1px 5px; color: var(--text-tertiary);
}
.kd-topbar-actions { display: flex; align-items: center; gap: var(--space-2); margin-left: auto; }

.kd-content { flex: 1; overflow-y: auto; padding: var(--space-5); }
.kd-page { max-width: 1400px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--space-5); }
.kd-page-header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; }
.kd-page-header h2 { font-size: var(--fs-xl); font-weight: 650; }
.kd-page-header p { color: var(--text-secondary); margin-top: 4px; max-width: 60ch; }
.kd-page-actions { display: flex; gap: var(--space-2); flex: none; }

/* ------------------------------ Utilities -------------------------------- */
.kd-row { display: flex; align-items: center; gap: var(--space-2); }
.kd-col { display: flex; flex-direction: column; gap: var(--space-2); }
.kd-grid { display: grid; gap: var(--space-4); }
.kd-grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.kd-grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.kd-grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .kd-grid-cols-4 { grid-template-columns: repeat(2, 1fr); } .kd-grid-cols-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 720px) { .kd-grid-cols-2, .kd-grid-cols-3, .kd-grid-cols-4 { grid-template-columns: 1fr; } }
.kd-muted { color: var(--text-secondary); }
.kd-subtle { color: var(--text-tertiary); }
.kd-mono { font-family: var(--font-mono); }
.kd-text-right { text-align: right; }
.kd-text-center { text-align: center; }
.kd-flex-1 { flex: 1; }
.kd-hidden { display: none !important; }
.kd-scroll-x { overflow-x: auto; }
.kd-divider { height: 1px; background: var(--border-subtle); border: none; margin: 0; }