/* ============================================================
   layout.css — Topbar, sidebar, main shell
   ============================================================ */

/* ════════════════════════════════════════════════════════════
   TOPBAR — fixed tactical bar with holographic underline
   ════════════════════════════════════════════════════════════ */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 0 var(--space-5);
  background:
    linear-gradient(180deg, rgba(11, 20, 34, 0.88), rgba(11, 20, 34, 0.72));
  -webkit-backdrop-filter: blur(22px) saturate(150%);
          backdrop-filter: blur(22px) saturate(150%);
  border-bottom: 1px solid var(--border);
  box-shadow:
    0 1px 0 0 rgba(255, 255, 255, 0.04) inset,
    0 10px 28px -16px rgba(0, 0, 0, 0.7);
}

/* Holographic gradient underline */
.topbar::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--cyan-shadow) 25%,
    var(--violet) 50%,
    var(--cyan-shadow) 75%,
    transparent 100%);
  opacity: 0.4;
  pointer-events: none;
}

.topbar-logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text);
  text-transform: uppercase;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 4px;
  position: relative;
  padding: 6px 10px;
}

/* Corner brackets around the logo — gives it a "target reticle" feel */
.topbar-logo::before,
.topbar-logo::after {
  content: '';
  position: absolute;
  width: 8px; height: 8px;
  border: 1px solid var(--cyan);
  opacity: 0.55;
}
.topbar-logo::before {
  top: 0; left: 0;
  border-right: none; border-bottom: none;
}
.topbar-logo::after {
  bottom: 0; right: 0;
  border-left: none; border-top: none;
}

/* Gradient fill on the main word */
.topbar-logo > * {
  background: linear-gradient(135deg, var(--cyan-bright), var(--violet));
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-bracket { color: var(--text3); -webkit-text-fill-color: var(--text3); font-weight: 400; }
.logo-word    { color: var(--text2); -webkit-text-fill-color: var(--text2); font-weight: 400; }

.topbar-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--text2);
  letter-spacing: 0.16em;
  white-space: nowrap;
  text-transform: uppercase;
}

.topbar-divider {
  width: 1px;
  height: 24px;
  background: linear-gradient(180deg, transparent, var(--border3), transparent);
  flex-shrink: 0;
}

.tbar-version {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text3);
  letter-spacing: 0.08em;
  padding: 3px 9px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: rgba(0, 0, 0, 0.3);
}

.topbar-clock {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--cyan);
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  text-shadow: 0 0 14px var(--cyan-glow), 0 0 4px var(--cyan-shadow);
  padding: 4px 12px;
  border: 1px solid var(--border-cyan);
  border-radius: var(--r-sm);
  background: linear-gradient(180deg, var(--cyan-dim), transparent);
  position: relative;
}

/* Tiny corner marks on the clock */
.topbar-clock::before,
.topbar-clock::after {
  content: '';
  position: absolute;
  width: 4px; height: 4px;
  border: 1px solid var(--cyan);
}
.topbar-clock::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.topbar-clock::after  { bottom: -1px; right: -1px; border-left: none; border-top: none; }

/* ════════════════════════════════════════════════════════════
   APP SHELL
   ════════════════════════════════════════════════════════════ */
.app-shell {
  display: flex;
  height: 100vh;
  padding-top: var(--topbar-height);
  position: relative;
  z-index: 1;
}

/* ════════════════════════════════════════════════════════════
   SIDEBAR — operator panel
   ════════════════════════════════════════════════════════════ */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background:
    linear-gradient(180deg, rgba(11, 20, 34, 0.82), rgba(6, 10, 20, 0.85));
  -webkit-backdrop-filter: blur(18px) saturate(140%);
          backdrop-filter: blur(18px) saturate(140%);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
}

/* Right-edge gradient highlight — divides sidebar from content */
.sidebar::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0; right: 0;
  width: 1px;
  background: linear-gradient(180deg,
    transparent 0%,
    var(--cyan-glow) 20%,
    var(--violet-glow) 50%,
    var(--cyan-glow) 80%,
    transparent 100%);
  opacity: 0.5;
}

.sb-section { padding: var(--space-4) 0 var(--space-2); }

.sb-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  padding: 0 var(--space-5) var(--space-3);
  position: relative;
  text-shadow: 0 0 8px var(--cyan-glow);
}

.sb-label::before {
  content: '';
  display: inline-block;
  width: 6px; height: 1px;
  background: currentColor;
  vertical-align: middle;
  margin-right: 8px;
}

.sb-label::after {
  content: '';
  position: absolute;
  bottom: var(--space-2);
  left: var(--space-5);
  right: var(--space-5);
  height: 1px;
  background: linear-gradient(90deg, var(--border-cyan) 0%, transparent 60%);
}

.sb-divider {
  height: 1px;
  background:
    linear-gradient(90deg, transparent, var(--border2) 30%, var(--border2) 70%, transparent);
  margin: var(--space-2) var(--space-4);
}

.sb-stat {
  margin: var(--space-2) var(--space-4);
  padding: var(--space-3) var(--space-4);
  background:
    linear-gradient(var(--bracket), var(--bracket)) top    left  / 8px 1px no-repeat,
    linear-gradient(var(--bracket), var(--bracket)) top    left  / 1px 8px no-repeat,
    linear-gradient(var(--bracket), var(--bracket)) bottom right / 8px 1px no-repeat,
    linear-gradient(var(--bracket), var(--bracket)) bottom right / 1px 8px no-repeat,
    linear-gradient(135deg, var(--bg2), var(--bg1));
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  position: relative;
  overflow: hidden;
}

.sb-stat::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--holo);
  opacity: 0.5;
}

.sb-stat-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--text3);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.sb-stat-value {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
  text-shadow: 0 0 18px var(--cyan-glow), 0 0 4px var(--cyan-shadow);
  letter-spacing: 0.02em;
}

.sb-stat-sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text2);
  margin-top: 4px;
  letter-spacing: 0.04em;
}

.sidebar-rerun {
  padding: var(--space-4);
  margin-top: auto;
  border-top: 1px solid var(--border);
  position: relative;
}

.sidebar-rerun::before {
  content: '';
  position: absolute;
  top: -1px; left: 12%; right: 12%;
  height: 1px;
  background: var(--holo);
  opacity: 0.5;
}

/* ════════════════════════════════════════════════════════════
   NAV ITEMS
   ════════════════════════════════════════════════════════════ */
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 9px var(--space-5);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--text2);
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast), padding-left var(--transition-fast);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

/* Left accent — animated gradient */
.nav-item::before {
  content: '';
  position: absolute;
  left: 0; top: 12px; bottom: 12px;
  width: 2px;
  background: transparent;
  transition: background var(--transition-fast), top var(--transition-fast), bottom var(--transition-fast);
}

.nav-item:hover {
  color: var(--text);
  background: linear-gradient(90deg, var(--cyan-dim) 0%, transparent 80%);
  padding-left: calc(var(--space-5) + 4px);
}
.nav-item:hover::before {
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan-shadow);
}

.nav-item.active {
  color: var(--cyan-bright);
  background: linear-gradient(90deg, var(--cyan-glow) 0%, transparent 70%);
  text-shadow: 0 0 8px var(--cyan-shadow);
}
.nav-item.active::before {
  top: 0; bottom: 0;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
  box-shadow: 0 0 14px var(--cyan-shadow);
}

.nav-icon {
  width: 15px; height: 15px;
  fill: none; stroke: currentColor;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
  flex-shrink: 0;
  opacity: 0.8;
  transition: opacity var(--transition-fast), filter var(--transition-fast);
}
.nav-item:hover .nav-icon  { opacity: 1; filter: drop-shadow(0 0 6px var(--cyan-shadow)); }
.nav-item.active .nav-icon { opacity: 1; filter: drop-shadow(0 0 8px var(--cyan-shadow)); }

.nav-badge {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 9px;
  padding: 2px 7px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border2);
  color: var(--text3);
  letter-spacing: 0.06em;
  white-space: nowrap;
  font-feature-settings: 'tnum';
  background: rgba(0, 0, 0, 0.25);
}

.nav-badge.danger {
  border-color: var(--border-red);
  color: var(--red);
  background: var(--red-soft);
  box-shadow: 0 0 8px var(--red-glow);
  animation: badge-pulse 2.4s var(--ease-in-out) infinite;
}

@keyframes badge-pulse {
  0%, 100% { box-shadow: 0 0 6px var(--red-glow); }
  50%      { box-shadow: 0 0 14px var(--red-glow); }
}

.nav-badge.warn {
  border-color: var(--border-amber);
  color: var(--amber);
  background: var(--amber-soft);
}

.nav-badge.ok {
  border-color: rgba(62, 234, 158, 0.40);
  color: var(--green);
  background: var(--green-soft);
  box-shadow: 0 0 6px var(--green-glow);
}

/* ════════════════════════════════════════════════════════════
   MAIN CONTENT
   ════════════════════════════════════════════════════════════ */
.main-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5) var(--space-6) var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--content-gap);
  min-width: 0;
}

/* ════════════════════════════════════════════════════════════
   CONTENT GRIDS
   ════════════════════════════════════════════════════════════ */
.grid-2    { display: grid; grid-template-columns: 1fr 1fr; gap: var(--content-gap); }
.grid-3    { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--content-gap); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--content-gap); }
.col-2-1   { display: grid; grid-template-columns: 2fr 1fr; gap: var(--content-gap); }
.col-score-threat { display: grid; grid-template-columns: 210px 1fr; gap: var(--content-gap); }