/* ============================================
   API Key Manager Pro — Layout
   ============================================ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-gray-800);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  transition: background 0.3s, color 0.3s;
  overflow-x: hidden;
}

/* ---- SIDEBAR ---- */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  z-index: 200;
  box-shadow: var(--shadow-sm);
  transition: width 0.3s cubic-bezier(0.4,0,0.2,1);
}

.sidebar.collapsed { width: var(--sidebar-collapsed); }

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  overflow: hidden;
}

.sidebar-brand .brand-icon {
  width: 36px; height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px;
  flex-shrink: 0;
}

.sidebar-brand .brand-name {
  font-weight: 700;
  font-size: 15px;
  color: var(--color-gray-900);
  white-space: nowrap;
  transition: opacity 0.2s;
}

.sidebar.collapsed .brand-name,
.sidebar.collapsed .nav-label,
.sidebar.collapsed .sidebar-section-title { opacity: 0; pointer-events: none; width: 0; }

.sidebar-nav { flex: 1; padding: 16px 0; overflow-y: auto; }

.sidebar-section-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-400);
  padding: 8px 20px 4px;
  white-space: nowrap;
  overflow: hidden;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  cursor: pointer;
  border-radius: 0;
  transition: var(--transition-fast);
  color: var(--color-gray-600);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  border-left: 3px solid transparent;
  text-decoration: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.nav-item:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.nav-item.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: 600;
}

.nav-item .nav-icon {
  font-size: 16px;
  width: 20px; height: 20px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.nav-item .nav-badge {
  margin-left: auto;
  background: var(--color-primary);
  color: #fff;
  font-size: 10px;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.sidebar-toggle-btn {
  position: absolute;
  top: 50%;
  right: -14px;
  transform: translateY(-50%);
  width: 28px; height: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 12px;
  color: var(--color-gray-500);
  z-index: 10;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-xs);
}
.sidebar-toggle-btn:hover { background: var(--color-primary); color: #fff; }

/* ---- MAIN AREA ---- */
.main-area {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left 0.3s cubic-bezier(0.4,0,0.2,1);
}

body.sidebar-collapsed .main-area { margin-left: var(--sidebar-collapsed); }

/* ---- TOPBAR ---- */
.topbar {
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-xs);
}

.topbar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-gray-900);
}

.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-search {
  display: flex;
  align-items: center;
  background: var(--color-gray-100);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 0 14px;
  gap: 8px;
  transition: var(--transition-fast);
}

.topbar-search:focus-within {
  border-color: var(--color-primary);
  background: var(--color-surface);
  box-shadow: var(--shadow-glow);
}

.topbar-search input {
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--color-gray-800);
  outline: none;
  width: 220px;
  padding: 8px 0;
  font-family: var(--font-sans);
}

.topbar-search input::placeholder { color: var(--color-gray-400); }

.topbar-search i { color: var(--color-gray-400); font-size: 14px; }

/* ---- PAGE CONTENT ---- */
.page-content {
  flex: 1;
  padding: 28px;
}

/* ---- PANEL VIEWS ---- */
.view-panel { display: none; }
.view-panel.active { display: block; }

/* ---- GRID ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 28px;
}

.content-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 24px;
  align-items: start;
}

/* Responsive */
@media (max-width: 1200px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .content-grid { grid-template-columns: 1fr; }
}

@media (max-width: 992px) {
  .sidebar { transform: translateX(-100%); transition: transform 0.28s cubic-bezier(0.4,0,0.2,1), width 0.3s cubic-bezier(0.4,0,0.2,1); }
  .sidebar.mobile-open { transform: translateX(0); }
  .main-area { margin-left: 0 !important; }
  .topbar { padding: 0 16px; }
  .page-content { padding: 16px; }
}

@media (max-width: 576px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .topbar-search { display: none; }
}