NebulaBrowser/renderer/style.css

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  background: #111;
  color: white;
  font-family: 'Segoe UI', sans-serif;
}

/* Global variables */
:root {
  /* Space reserved on the left for system window controls (traffic lights on macOS).
     Applied cross-platform per request to keep a consistent layout. */
  --window-controls-offset: 80px; /* adjust if needed */
}

/* TAB STRIP */
#tab-bar {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  /* Increase left padding to avoid overlap with OS window controls area */
  padding: 2px 6px 0 var(--window-controls-offset);
  background: #1b1c20; /* strip background like modern browsers */
  border-bottom: 1px solid #2a2c33; /* hairline under tabs */
  overflow-x: auto; /* scroll when many tabs */
  scrollbar-color: #444 #2a2a3c;   /* thumb and track for Firefox */
  scrollbar-width: thin;            /* slimmer track */
}

/* NAVBAR LAYOUT */
#nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  background: #1e1e2e;
  gap: 12px;
  /* flatter header to reduce paint cost */
  box-shadow: none;
  /* Ensure the nav sits above embedded <webview> surfaces */
  position: relative;
  z-index: 10000;
}

/* Make the top nav a draggable region on macOS when we use a hidden titlebar.
   Interactive controls inside must opt-out with -webkit-app-region: no-drag. */
@supports (-webkit-app-region: drag) {
  /* Make both the tab strip and the nav area draggable so users have a
     larger region to click-and-drag the window. Keep interactive elements
     marked as no-drag so buttons and tabs remain clickable. */
  #tab-bar,
  #nav {
    -webkit-app-region: drag;
    user-select: none;
    /* keep the appearance consistent even if transparent window behind it */
    background: rgba(30,30,46,0.9);
    backdrop-filter: blur(6px);
  }

  /* Interactive controls must explicitly opt-out of dragging. This keeps
     the larger draggable area while preserving normal click behavior. */
  #nav button,
  #nav input,
  #menu-popup,
  .tab,
  .tab *,
  .new-tab-button,
  .tab .tab-close,
  #window-controls {
    -webkit-app-region: no-drag;
  }

  /* Ensure the new-tab button (which sits on the tab strip) is not draggable */
  #tab-bar .new-tab-button {
    -webkit-app-region: no-drag;
  }
}

.nav-left,
.nav-center,
.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-center {
  flex: 1;
  background: #2a2a3c;
  padding: 4px 6px;
  border-radius: 6px;
}

#favicon {
  width: 16px;
  height: 16px;
  margin-right: 4px;
}

#url {
  flex: 1;
  background: transparent;
  border: none;
  color: white;
  font-size: 14px;
  outline: none;
}

#url::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

#nav button {
  background: #333;
  color: white;
  border: none;
  padding: 6px 10px;
  border-radius: 5px;
  cursor: pointer;
  transition: background 120ms ease;
}

#nav button:hover {
  background: #555;
}

/* MENU DROPDOWN */
.menu-wrapper {
  position: relative;
  /* keep wrapper on a higher layer so absolute popup can composit above webviews */
  z-index: 10001;
}

#menu-popup {
  position: absolute;
  top: 30px;
  right: 0;
  background: #2a2a3c;
  border-radius: 4px;
  padding: 4px;
  display: flex;
  flex-direction: column;
  min-width: 200px;  /* wider dropdown */
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
  /* Much higher z-index and force its own compositing layer so it renders above <webview> guests */
  z-index: 20000;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  will-change: transform, opacity;
}

#menu-popup button {
  background: none;
  border: none;
  color: white;
  text-align: left;
  padding: 6px 10px;
  border-radius: 4px;
}

#menu-popup button:hover {
  background: #444;
}

.hidden {
  display: none;
}

#menu-popup.hidden {
  display: none;
}

/* WEBVIEWS */
#webviews {
  flex: 1;
  display: flex;
  width: 100%;
  position: relative;
  /* make sure webviews render on a separate base layer behind nav */
  z-index: 0;
}
#webviews.hidden {
  display: none;
}

#webviews webview {
  flex: 1;
  width: 100%;
  height: 100%;
  border: none;
  display: none;
}
#webviews webview.active {
  display: flex;
}
/* When webviews is hidden, collapse its flex size */
#webviews.hidden {
  flex: 0;
}

/* HOME CONTAINER */
#home-container {
  flex: 1;
  display: none;
  width: 100%;
  position: relative;
  z-index: 0;
}

#home-container.active {
  display: flex;
}

#home-webview {
  width: 100%;
  height: 100%;
  border: none;
  display: none;
  flex: 1;
  position: relative;
  z-index: 0;
}
/* Show home webview when container is active */
#home-container.active > #home-webview {
  display: flex;
}

/* TABS */
.tab {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px; /* slimmer padding */
  margin: 0;
  height: 28px; /* reduce overall tab height */
  color: #ddd;
  /* use flat background to avoid gradient paints */
  background: #24262b;
  border: 1px solid #2b2d34;
  border-bottom: none; /* let it visually merge with the strip line */
  border-radius: 6px 6px 0 0; /* slightly tighter radius */
  cursor: pointer;
  user-select: none;
  max-width: 260px;
  min-width: 120px;
  flex: 0 1 180px; /* like Chrome: shrink when crowded */
  overflow: hidden;
  transition: background 120ms ease, color 120ms ease;
}

.tab:hover { background: #2a2c33; }

.tab.active {
  color: #fff;
  background: #2f323a;
  /* remove expensive inner shadows */
  box-shadow: none;
}

.tab .tab-favicon {
  width: 16px;
  height: 16px;
  border-radius: 2px;
  flex: 0 0 auto;
}

.tab .tab-title {
  flex: 1 1 auto;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 12px;
}

.tab .tab-close {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 11px;
  background: transparent;
  color: #b5b5b5;
  opacity: 0; /* hidden by default */
  transition: background 120ms ease, color 120ms ease, opacity 120ms ease;
}

.tab:hover .tab-close,
.tab.active .tab-close { opacity: 1; }
.tab .tab-close:hover { background: #3b3e47; color: #fff; }
.tab .tab-close:active { background: #2e3139; }

/* New tab (+) button aligned to the right end of the strip */
.new-tab-button {
  margin-left: 6px;
  flex: 0 0 auto;
  width: 24px;  /* tighter button */
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid #2b2d34;
  background: #23252b;
  color: #d5d5d5;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}
.new-tab-button:hover { background: #2b2d34; color: #fff; border-color: #3a3d46; }
.new-tab-button:active { background: #262830; }

/* ZOOM CONTROLS */
.zoom-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
}
.zoom-controls .zoom-label {
  flex: 1;
  font-size: 14px;
}
.zoom-controls button {
  background: none;
  border: none;
  color: white;
  font-size: 16px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
}
.zoom-controls button:hover {
  background: #444;
}
#zoom-percent {
  min-width: 36px;
  text-align: center;
  font-size: 14px;
}

/* window controls (Windows only) */
#window-controls {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  gap: 2px;
  padding: 4px;
  z-index: 200;
}
#window-controls button {
  width: 46px;
  height: 28px;
  background: transparent;
  border: none;
  color: white;
  font-size: 12px;
  cursor: pointer;
  transition: background 120ms ease;
}
#window-controls button:hover {
  background: rgba(255,255,255,0.1);
}
#window-controls #close-btn:hover {
  background: #e81123;
}

#tab-bar::-webkit-scrollbar {
  height: 8px;                      /* horizontal scrollbar height */
}
#tab-bar::-webkit-scrollbar-track {
  background: #2a2a3c;
  border-radius: 4px;
}
#tab-bar::-webkit-scrollbar-thumb {
  background: #444;
  border-radius: 4px;
}
#tab-bar::-webkit-scrollbar-thumb:hover {
  background: #555;
}

/* Tab animations */
.tab--flip {
  transition: transform 180ms cubic-bezier(0.2, 0, 0, 1);
}
.tab--enter {
  animation: tab-enter 160ms ease-out both;
}
.tab--closing {
  animation: tab-exit 140ms ease-in both;
}

@keyframes tab-enter {
  from {
    opacity: 0;
    transform: translateY(6px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes tab-exit {
  to {
    opacity: 0;
    transform: translateY(-6px) scale(0.95);
  }
}

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}