/* Base */
html, body { font-size: 16px !important; min-height: 100%; }
body, .glass-card, .results-box {
  font-family: "Roboto", "Inter", "Segoe UI", sans-serif !important;
  line-height: 1.6 !important;
}
body { display: flex; flex-direction: column; }

/* Layout */
.main { min-height: 100vh; margin-left: 250px; padding: 2rem; transition: margin-left 0.3s ease; }
@media (max-width: 991px) { .main { margin-left: 0; } }

.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 250px;
  height: 100vh;
  background: linear-gradient(180deg, #2b2b2b, #1f1f1f) !important;
  backdrop-filter: blur(10px);
  padding-top: 1rem;
  transition: transform 0.3s ease;
  z-index: 1050;
}
@media (max-width: 991px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
}

/* Backdrop */
#sidebarBackdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  opacity: 0;
  visibility: hidden;
  display: none;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 1040;
}
#sidebarBackdrop.show {
  display: block;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Nav links */
.sidebar .nav-link {
  font-size: 1.2rem;
  margin: 0.3rem 0;
  color: #ddd;
  border-radius: 8px;
  padding: 10px 15px;
  transition: background 0.3s, color 0.3s;
}
.sidebar .nav-link:hover { background: rgba(255,255,255,0.1); color: #fff; }
.sidebar .nav-link.active { background: #0d6efd; color: #fff !important; }

/* Logo */
.logo {
  color: #fff;
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 1rem 0;
  text-align: center;
}

/* Cards */
.glass-card {
  background: rgba(30, 30, 30, 0.85);
  backdrop-filter: blur(12px);
  border-radius: 15px;
  border: 1px solid rgba(255,255,255,0.1);
}

/* Overlay */
#loadingOverlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 2000;
}

/* Mobile adjustments */
.toggle-btn { position: fixed; top: 15px; left: 15px; z-index: 1100; }
@media (max-width: 575.98px) {
  :root { --tap: 48px; }
  .btn, .form-control { min-height: var(--tap); font-size: 1.05rem; }
  .sidebar .nav-link { padding: 0.75rem 1rem; font-size: 1.05rem; }
  .main, .container { padding-left: 1rem; padding-right: 1rem; }
}