/* ── SIDEBAR ──────────────────────────────────────── */
.sb-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 99;
}
.sb-overlay.active { display: block; }

.sidebar {
  position: fixed;
  top: 0; bottom: 0; left: 0;
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  backdrop-filter: blur(28px) saturate(1.3);
  -webkit-backdrop-filter: blur(28px) saturate(1.3);
  border-right: 1px solid var(--sidebar-border);
  box-shadow: 2px 0 24px rgba(0,0,0,0.12);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 18px 0 22px;
  gap: 14px;
  z-index: 100;
  transition: width 0.3s cubic-bezier(0.4,0,0.2,1), padding 0.3s ease, background 0.35s, border-color 0.35s;
}

.sidebar.open {
  width: 220px;
  align-items: flex-start;
  padding: 18px 14px 22px;
  box-shadow: 4px 0 36px rgba(0,0,0,0.18);
  z-index: 101;
}

.sb-label {
  display: none;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  color: inherit;
}
.sidebar.open .sb-label { display: block; }

.sb-hamburger {
  width: 40px; height: 40px;
  background: transparent; border: none; border-radius: 10px;
  color: var(--text-muted); font-size: 17px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background 0.2s, color 0.2s;
}
.sb-hamburger:hover { background: rgba(224,116,34,0.1); color: var(--teal); }
.sidebar.open .sb-hamburger { width: 100%; justify-content: flex-start; gap: 10px; padding: 0 6px; }

.sb-new-chat {
  width: 40px; height: 40px; border-radius: 50%;
  background: transparent; border: 1.5px solid var(--teal);
  color: var(--teal); font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  text-decoration: none; transition: all 0.25s;
}
.sb-new-chat:hover { background: var(--teal); color: #fff; box-shadow: 0 0 18px rgba(224,116,34,0.35); }
.sidebar.open .sb-new-chat { width: 100%; border-radius: 12px; justify-content: flex-start; padding: 0 14px; gap: 12px; height: 42px; }

.sb-divider {
  width: 32px; height: 1px;
  background: var(--sidebar-border);
  flex-shrink: 0;
  transition: width 0.3s;
}
.sidebar.open .sb-divider { width: 100%; }

.sb-actions {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  width: 100%;
}

.sb-action-btn {
  width: 40px; height: 40px; border-radius: 10px;
  background: transparent; border: none;
  color: var(--text-muted); font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background 0.2s, color 0.2s;
  font-family: 'Cairo', sans-serif;
}
.sb-action-btn:hover { background: rgba(224,116,34,0.1); color: var(--teal); }
.sidebar.open .sb-action-btn { width: 100%; justify-content: flex-start; gap: 10px; padding: 0 10px; height: 38px; font-size: 14px; border-radius: 10px; }

.sb-login-btn {
  width: 40px; height: 40px; border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  border: none; color: #fff; font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all 0.25s;
  box-shadow: 0 4px 14px rgba(224,116,34,0.35);
  font-family: 'Cairo', sans-serif;
}
.sb-login-btn:hover { transform: scale(1.07); box-shadow: 0 6px 20px rgba(224,116,34,0.5); }
.sidebar.open .sb-login-btn { width: 100%; border-radius: 12px; justify-content: flex-start; gap: 10px; padding: 0 14px; height: 42px; font-size: 14px; font-weight: 700; }

.sb-socials {
  margin-top: auto;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.sidebar.open .sb-socials { width: 100%; }

.sb-socials a {
  width: 34px; height: 34px; border-radius: 8px;
  color: var(--text-muted); font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  text-decoration: none; transition: color 0.2s, background 0.2s;
}
.sb-socials a:hover { color: var(--teal); background: rgba(224,116,34,0.1); }
.sidebar.open .sb-socials a { width: 100%; justify-content: flex-start; padding: 0 10px; gap: 12px; border-radius: 10px; height: 38px; }

/* offset app by sidebar width */
.app { margin-left: var(--sidebar-w); width: calc(100% - var(--sidebar-w)); }

/* ── SIDEBAR TOOLTIPS ─────────────────────────────── */
.sidebar [data-tooltip] { position: relative; }

.sidebar [data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 14px);
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  background: rgba(22,8,0,0.92);
  color: #fff;
  font-family: 'Cairo', sans-serif;
  font-size: 12.5px;
  font-weight: 600;
  white-space: nowrap;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid rgba(224,116,34,0.25);
  box-shadow: 0 6px 20px rgba(0,0,0,0.35), 0 0 0 1px rgba(224,116,34,0.1);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 200;
}

/* arrow pointing right toward sidebar */
.sidebar [data-tooltip]::before {
  content: '';
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  border: 5px solid transparent;
  border-right-color: rgba(22,8,0,0.92);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 200;
}

.sidebar [data-tooltip]:hover::after,
.sidebar [data-tooltip]:hover::before {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* hide tooltips when sidebar is expanded */
.sidebar.open [data-tooltip]::after,
.sidebar.open [data-tooltip]::before { display: none; }

[data-theme="light"] .sidebar [data-tooltip]::after {
  background: rgba(46,21,8,0.92);
  border-color: rgba(224,116,34,0.2);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15), 0 0 0 1px rgba(224,116,34,0.08);
}
[data-theme="light"] .sidebar [data-tooltip]::before {
  border-right-color: rgba(46,21,8,0.92);
}

/* ── MOBILE MENU BTN ──────────────────────────────── */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 98;
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--topbar-bg);
  border: 1px solid var(--card-border);
  color: var(--text);
  font-size: 17px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.mobile-menu-btn:hover { border-color: rgba(224,116,34,0.4); color: var(--teal); }