/* ================================================================
   4xForecaster — Left sidebar navigation
   ================================================================ */

:root {
  --sb-w-collapsed:  68px;
  --sb-w-expanded:   240px;
  --sb-transition:   0.22s ease;
}

/* ── Body shift ────────────────────────────────────────────────── */
body.has-sidebar {
  margin-left: var(--sb-w-collapsed);
  transition: margin-left var(--sb-transition);
}

/* ── Sidebar shell ─────────────────────────────────────────────── */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  width: var(--sb-w-collapsed);
  background: var(--bg-card, #151d2e);
  border-right: 1px solid var(--border, #1e2d4a);
  display: flex;
  flex-direction: column;
  z-index: 200;
  overflow: hidden;
  transition: width var(--sb-transition);
  /* prevent text-select flicker on hover */
  user-select: none;
}

.sidebar:hover,
.sidebar.sb-open {
  width: var(--sb-w-expanded);
}

/* ── Top toggle button ─────────────────────────────────────────── */
.sb-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 56px;
  min-height: 56px;
  background: none;
  border: none;
  border-bottom: 1px solid var(--border-dim, #162035);
  color: var(--text-muted, #94a3b8);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: color var(--sb-transition), background var(--sb-transition);
}
.sb-toggle:hover { color: var(--cyan, #06b6d4); background: rgba(6,182,212,.05); }
.sb-toggle svg   { flex-shrink: 0; }

/* ── Nav links ─────────────────────────────────────────────────── */
.sb-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 0;
}

.sb-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 0 11px 22px;
  text-decoration: none;
  color: var(--text-muted, #94a3b8);
  font-family: var(--font-data, monospace);
  font-size: 0.65rem;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  transition: color var(--sb-transition), background var(--sb-transition);
  border-left: 2px solid transparent;
  cursor: pointer;
  background: none;
  border-top: none;
  border-right: none;
  border-bottom: none;
  width: 100%;
  text-align: left;
}
.sb-link:hover { color: var(--cyan, #06b6d4); background: rgba(6,182,212,.04); }
.sb-link.sb-active {
  color: var(--cyan, #06b6d4);
  border-left-color: var(--cyan, #06b6d4);
  background: rgba(6,182,212,.06);
}
.sb-link.sb-dim {
  opacity: 0.45;
  cursor: default;
  pointer-events: none;
}

.sb-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  flex-shrink: 0;
}

.sb-label { flex-shrink: 0; }

.sb-badge {
  font-size: 0.48rem;
  letter-spacing: 0.6px;
  padding: 1px 5px;
  border-radius: 3px;
  background: var(--border, #1e2d4a);
  color: var(--text-muted, #94a3b8);
  flex-shrink: 0;
  margin-left: 2px;
}

/* ── Sub-links ─────────────────────────────────────────────────── */
.sb-sub {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.2s ease;
}
.sidebar:hover .sb-sub-active,
.sidebar.sb-open .sb-sub-active {
  max-height: 200px;
}
.sb-sublink {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 0 8px 52px;
  text-decoration: none;
  color: var(--text-muted, #94a3b8);
  font-family: var(--font-data, monospace);
  font-size: 0.6rem;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  transition: color var(--sb-transition);
}
.sb-sublink:hover { color: var(--cyan, #06b6d4); }
.sb-sublink.sb-active { color: var(--cyan, #06b6d4); }

/* ── Mobile overlay ────────────────────────────────────────────── */
.sb-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 199;
  background: rgba(10,14,23,.6);
  backdrop-filter: blur(2px);
}
.sb-overlay.sb-overlay-visible { display: block; }

/* ── Mobile hamburger in site-header ───────────────────────────── */
.sb-mobile-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  color: var(--text-muted, #94a3b8);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  margin-right: 8px;
}
.sb-mobile-btn:hover { color: var(--cyan, #06b6d4); }

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
  body.has-sidebar { margin-left: 0; }

  .sidebar {
    width: var(--sb-w-expanded);
    transform: translateX(-100%);
    transition: transform var(--sb-transition), width var(--sb-transition);
    top: 0;
    height: 100vh;
  }
  .sidebar.sb-open {
    transform: translateX(0);
    width: var(--sb-w-expanded);
  }
  /* Sub-links always expand on mobile when sidebar is open */
  .sidebar.sb-open .sb-sub {
    max-height: 200px;
  }
  .sb-mobile-btn { display: flex; }
  .sb-toggle     { display: none; }
}