/* ==========================================================================
   sidebar.css — brand, accordion navigation, collapse rail, mobile drawer
   ========================================================================== */

.sidebar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  flex: none;
  width: var(--sidebar-w);
  height: 100vh;
  border-right: 1px solid var(--border);
  background: var(--bg-sidebar);
  transition: width var(--t-slow), transform var(--t-slow);
}

/* --- Brand ---------------------------------------------------------------- */
.sidebar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: none;
  height: var(--header-h);
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 11px; flex: 1; min-width: 0; }
/* The logo ships with its own dark backdrop, so the tile carries no gradient —
   just the radius, and a glow that answers on hover. */
.brand__mark {
  display: block;
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--surface);
  object-fit: cover;
  transition: transform var(--t), box-shadow var(--t);
}
.brand:hover .brand__mark {
  transform: scale(1.06);
  box-shadow: 0 10px 30px -8px var(--primary-glow);
}
.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name {
  font-size: var(--text-md);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.brand__tagline {
  font-size: var(--text-xs);
  color: var(--text-subtle);
  white-space: nowrap;
}
.sidebar__close { display: none; }

/* --- Navigation ----------------------------------------------------------- */
.nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-5) var(--space-3);
}
.nav__label {
  padding: 0 var(--space-3);
  margin-bottom: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.nav__list { display: flex; flex-direction: column; gap: 2px; }

.nav__link,
.accordion__trigger {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  padding: 9px var(--space-3);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: var(--text-base);
  font-weight: 500;
  text-align: left;
  transition: background-color var(--t), color var(--t);
}
.nav__link .icon,
.accordion__trigger > .icon:first-child { color: var(--text-subtle); transition: color var(--t); }

.nav__link:hover,
.accordion__trigger:hover {
  background: rgba(255, 255, 255, 0.045);
  color: var(--text);
}
.nav__link:hover .icon,
.accordion__trigger:hover > .icon:first-child { color: var(--text-secondary); }

/* Active: tinted pill + gradient rail on the left edge. */
.nav__link.is-active {
  background: var(--primary-soft);
  color: var(--text);
  font-weight: 550;
}
.nav__link.is-active .icon { color: var(--primary); }

.nav__link.is-active::before,
.accordion.is-open > .accordion__trigger::before {
  content: "";
  position: absolute;
  left: calc(var(--space-3) * -1 + 1px);
  top: 50%;
  width: 3px;
  height: 18px;
  border-radius: var(--radius-pill);
  background: var(--gradient);
  transform: translateY(-50%);
  animation: rail-in var(--t) both;
}
@keyframes rail-in { from { height: 0; opacity: 0; } }

.nav__text {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav__count {
  flex: none;
  min-width: 20px;
  padding: 1px 6px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-subtle);
  font-size: var(--text-xs);
  font-weight: 600;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* --- Accordion ------------------------------------------------------------ */
.accordion__chevron {
  width: 15px;
  height: 15px;
  color: var(--text-subtle);
  transition: transform var(--t);
}
.accordion.is-open .accordion__chevron { transform: rotate(180deg); }
.accordion.is-open > .accordion__trigger { color: var(--text); }
.accordion.is-open > .accordion__trigger > .icon:first-child { color: var(--primary); }

/* 0fr → 1fr: a real height animation with no JS measurement. */
.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows var(--t-slow), opacity var(--t);
}
.accordion.is-open .accordion__panel { grid-template-rows: 1fr; opacity: 1; }

.submenu {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin: 0 0 0 25px;
  padding-left: var(--space-3);
  border-left: 1px solid var(--border);
}
.accordion.is-open .submenu { padding-top: 4px; padding-bottom: 4px; }

.submenu__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 11px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: var(--text-base);
  transition: background-color var(--t), color var(--t), transform var(--t);
}
.submenu__link:hover {
  background: rgba(255, 255, 255, 0.045);
  color: var(--text);
  transform: translateX(2px);
}
.submenu__link.is-active {
  background: var(--primary-soft);
  color: #93b8ff;
  font-weight: 550;
}
.submenu__dot {
  flex: none;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  transition: background var(--t), transform var(--t), box-shadow var(--t);
}
.submenu__link:hover .submenu__dot { background: var(--text-muted); }
.submenu__link.is-active .submenu__dot {
  background: var(--primary);
  transform: scale(1.3);
  box-shadow: 0 0 8px var(--primary-glow);
}

/* --- Collapsed rail (desktop) --------------------------------------------- */
.app.is-collapsed .sidebar { width: var(--sidebar-w-collapsed); }
.app.is-collapsed .brand__text,
.app.is-collapsed .nav__text,
.app.is-collapsed .nav__count,
.app.is-collapsed .nav__label,
.app.is-collapsed .accordion__chevron { display: none; }
.app.is-collapsed .sidebar__brand,
.app.is-collapsed .brand { justify-content: center; padding: 0; }
.app.is-collapsed .nav { padding: var(--space-5) var(--space-2); }
.app.is-collapsed .nav__link,
.app.is-collapsed .accordion__trigger { justify-content: center; padding: 11px 0; }
.app.is-collapsed .nav__link.is-active::before,
.app.is-collapsed .accordion.is-open > .accordion__trigger::before { display: none; }
.app.is-collapsed .nav__link.is-active,
.app.is-collapsed .accordion.is-open > .accordion__trigger { background: var(--primary-soft); }
.app.is-collapsed .accordion__panel { display: none; }

/* Tooltip so the icon rail stays usable. */
.app.is-collapsed .nav__link::after,
.app.is-collapsed .accordion__trigger::after {
  content: attr(data-tip);
  position: absolute;
  left: calc(100% + 12px);
  top: 50%;
  z-index: 70;
  padding: 6px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--glass-strong);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: var(--text-sm);
  white-space: nowrap;
  opacity: 0;
  transform: translateY(-50%) translateX(-4px);
  pointer-events: none;
  transition: opacity var(--t), transform var(--t);
}
.app.is-collapsed .nav__link:hover::after,
.app.is-collapsed .accordion__trigger:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* --- Footer link (Saran Fitur) — pinned to the bottom of the rail ---------- */
.sidebar__foot {
  flex: none;
  padding: var(--space-3);
  border-top: 1px solid var(--border);
}
.nav__link--suggest .icon { color: var(--primary); }
.app.is-collapsed .sidebar__foot { padding: var(--space-3) var(--space-2); }