/* ── DPanel Layout ───────────────────────────────────────────────────────────── */

:root {
  --sidebar-w:  188px;
  --topbar-h:   48px;
}

/* ── Reset ───────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg-base); color: var(--text-primary); }

/* ── Sidebar — fixed left column ─────────────────────────────────────────────── */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100dvh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 40;
  overflow: hidden;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  height: var(--topbar-h);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-logo-mark {
  width: 26px; height: 26px;
  background: linear-gradient(135deg, var(--accent) 0%, #7b5cf6 100%);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem; font-weight: 500; color: #fff;
  letter-spacing: -0.03em;
  box-shadow: 0 2px 8px rgba(79,142,247,0.4);
  flex-shrink: 0;
}

.sidebar-logo-text {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.sidebar-logo-version {
  font-family: var(--font-mono);
  font-size: 0.575rem;
  color: var(--text-muted);
  margin-left: auto;
  background: var(--bg-elevated);
  padding: 2px 5px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
}

.sidebar-nav {
  flex: 1;
  padding: 6px 8px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.nav-section-label {
  font-size: 0.575rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 10px 6px 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  transition: background var(--duration-fast) var(--ease-out-expo),
              color var(--duration-fast) var(--ease-out-expo);
  user-select: none;
  border: 1px solid transparent;
}

.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--border-accent);
}
.nav-item.active .nav-icon { color: var(--accent); }

.nav-icon {
  width: 15px; height: 15px;
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity var(--duration-fast);
}
.nav-item:hover .nav-icon,
.nav-item.active .nav-icon { opacity: 1; }

.nav-badge {
  margin-left: auto;
  font-size: 0.575rem;
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: var(--radius-pill);
}

.sidebar-footer {
  padding: 6px 8px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--duration-fast);
}
.sidebar-user:hover { background: var(--bg-hover); }

.user-avatar {
  width: 26px; height: 26px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #3a4a6a 0%, #1e2a45 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.65rem; font-weight: 600; color: var(--accent);
  flex-shrink: 0;
}

.user-info { flex: 1; min-width: 0; }
.user-name  { font-size: 0.8rem; font-weight: 500; color: var(--text-primary); }
.user-role  { font-size: 0.6875rem; color: var(--text-muted); }

/* ── Topbar — fixed top strip, starts after sidebar ─────────────────────────── */
.topbar {
  position: fixed;
  top: 0;
  left: var(--sidebar-w);
  right: 0;
  height: var(--topbar-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  z-index: 30;
  gap: 12px;
}

.topbar-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.topbar-breadcrumb .current { color: var(--text-primary); font-weight: 500; }
.topbar-sep { color: var(--text-muted); }

.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-hostname {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-elevated);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
}

.topbar-clock {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

/* ── App shell — just a wrapper ──────────────────────────────────────────────── */
.app-shell { min-height: 100dvh; }

/* ── Content area — pushed right of sidebar, below topbar ───────────────────── */
.content-area {
  margin-left: var(--sidebar-w);
  margin-top: var(--topbar-h);
  padding: 16px;
  min-height: calc(100dvh - var(--topbar-h));
  overflow-y: auto;
}

/* ── Page sections ───────────────────────────────────────────────────────────── */
.page-section {
  display: none;
  animation: fadeUp var(--duration-slow) var(--ease-out-expo) forwards;
}
.page-section.active { display: block; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  gap: 12px;
}

.page-header-left h2 {
  font-size: 1.1875rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.page-header-left p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 1px;
}

/* ── Login page ──────────────────────────────────────────────────────────────── */
.login-shell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.login-bg {
  position: fixed; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(79,142,247,0.1) 0%, transparent 70%),
              radial-gradient(ellipse 60% 50% at 80% 90%, rgba(123,92,246,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.login-card-outer {
  width: 100%; max-width: 400px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 3px;
  box-shadow: 0 32px 80px -12px rgba(0,0,0,0.8), 0 1px 0 0 rgba(255,255,255,0.06) inset;
  animation: fadeUp var(--duration-slow) var(--ease-out-expo) forwards;
}

.login-card-inner {
  background: var(--bg-surface);
  border-radius: calc(var(--radius-xl) - 3px);
  padding: 40px;
  box-shadow: 0 1px 0 0 rgba(255,255,255,0.04) inset;
}

.login-logo {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 32px;
}

.login-logo-mark {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent) 0%, #7b5cf6 100%);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.9rem; font-weight: 500; color: #fff;
  box-shadow: 0 4px 16px rgba(79,142,247,0.4);
}

.login-title    { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.025em; }
.login-subtitle { font-size: 0.8125rem; color: var(--text-muted); margin-top: 4px; }

/* ── Responsive ──────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform var(--duration-base) var(--ease-out-expo); }
  .sidebar.open { transform: translateX(0); }
  .topbar { left: 0; }
  .content-area { margin-left: 0; padding: 12px; }
}