/* ==========================================
   Base Layout Styles
   Reset, Scrollbar, App Structure, Topbar
   ========================================== */

* { box-sizing: border-box; }

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bp-scrollbar-track);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--bp-scrollbar-thumb);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--bp-scrollbar-thumb);
  opacity: 0.8;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  background: var(--bp-gradient-bg);
  color: var(--bp-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.3s ease, color 0.3s ease;
}

.app-root {
  display: grid;
  grid-template-rows: 56px 1fr 32px;
  flex: 1;
  min-height: 0;
}

/* ==========================================
   Topbar Styles
   ========================================== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--bp-border-subtle);
  backdrop-filter: blur(18px);
  background: var(--bp-gradient-topbar);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 2px solid var(--bp-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--bp-accent);
}

.brand-text-main {
  font-weight: 600;
  font-size: 16px;
}

.brand-text-sub {
  font-size: 12px;
  color: var(--bp-text-muted);
}

/* ==========================================
   Top Navigation
   ========================================== */
.top-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 13px;
}

.top-nav-item {
  cursor: pointer;
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--bp-text-muted);
  border: 1px solid transparent;
}

.top-nav-item.active {
  color: var(--bp-primary);
  border-color: var(--bp-accent-soft);
  background: var(--bp-surface-elevated);
}

[data-theme="light"] .top-nav-item.active {
  color: var(--bp-primary);
  background: var(--bp-primary-soft);
  border-color: var(--bp-primary);
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pill {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--bp-border-subtle);
  color: var(--bp-text-muted);
}

/* ==========================================
   Theme Toggle Button
   ========================================== */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--bp-border-subtle);
  background: var(--bp-surface-elevated);
  color: var(--bp-text-muted);
  cursor: pointer;
  font-size: 11px;
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--bp-primary);
  color: var(--bp-primary);
}

.theme-toggle-icon {
  font-size: 14px;
}