@import url("https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600&family=Outfit:wght@300;400;500&display=swap");

/* ═══════════════════════════════════════════════════════════════════════
   AURORA BROWSER — Premium Dark Theme
   Performance strategy: transform/opacity only animations (compositor-only),
   no blur/backdrop-filter, no box-shadow on animated elements.
   All color transitions on static elements only.
   ═══════════════════════════════════════════════════════════════════════ */

:root {
  /* Palette — deep space aurora (Mint Variant) */
  --void:        #0a0c0b;   /* Slightly desaturated toward green */
  --base:        #111412;
  --surface:     #171c19;
  --elevated:    #1e2521;
  --overlay:     #252e29;
  --border-dim:  #2d3832;
  --border:      #36453d;
  --border-lit:  #465a50;

  /* Aurora accent spectrum — The #26ff9a Overhaul */
  --aurora-1:     #26ff9a;   /* Primary Mint */
  --aurora-2:     #00d4ff;   /* Cyan highlight */
  --aurora-3:     #b0ff61;   /* Lime highlight */
  --aurora-4:     #ffffff;   /* Pure white for brilliance */

  /* Text */
  --text-bright:  #e6fff4;   /* Tinted with mint */
  --text:         #c2d1c9;
  --text-muted:   #688074;
  --text-ghost:   #3b4a42;

  /* Semantic */
  --accent:       var(--aurora-1);
  --accent-glow:  rgba(38, 255, 154, 0.15); /* Modified for #26ff9a */
  --danger:       #ff5c5c;
  --danger-bg:    rgba(255, 92, 92, 0.12);

  /* Geometry */
  --r-tab:        8px 8px 0 0;
  --r-sm:         6px;
  --r-md:         10px;
  --r-pill:       100px;

  /* Motion */
  --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:  cubic-bezier(0.45, 0, 0.55, 1);
  --t-fast:       90ms;
  --t-mid:        180ms;
  --t-slow:       320ms;

  --font-display: "Syne", system-ui, sans-serif;
  --font-body:    "Outfit", system-ui, sans-serif;
}

/* ─── KEYFRAMES (compositor-only: transform + opacity) ──────────────── */

@keyframes slide-down {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes tab-in {
  from { opacity: 0; transform: scaleX(0.85) translateY(4px); transform-origin: left center; }
  to   { opacity: 1; transform: scaleX(1)    translateY(0);   }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1;    transform: scale(1);    }
  50%       { opacity: 0.5; transform: scale(0.75); }
}

@keyframes shimmer-bar {
  from { transform: translateX(-100%); }
  to   { transform: translateX(400%);  }
}

@keyframes favicon-spin {
  from { transform: rotate(0deg);   }
  to   { transform: rotate(360deg); }
}

@keyframes bookmark-pop {
  0%   { transform: scale(1);    }
  40%  { transform: scale(1.35); }
  70%  { transform: scale(0.9);  }
  100% { transform: scale(1);    }
}

@keyframes aurora-drift {
  0%   { transform: translate(0, 0)    rotate(0deg);   }
  33%  { transform: translate(4px, -3px) rotate(1deg); }
  66%  { transform: translate(-3px, 2px) rotate(-1deg);}
  100% { transform: translate(0, 0)    rotate(0deg);   }
}

/* ─── BASE ──────────────────────────────────────────────────────────── */

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

body {
  font-family: var(--font-body);
  margin: 0;
  background: var(--void);
  color: var(--text);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ─── BROWSER SHELL ─────────────────────────────────────────────────── */

#browser-ui {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  animation: slide-down var(--t-slow) var(--ease-out) both;
}

/* ─── TAB STRIP ─────────────────────────────────────────────────────── */

#tabs-strip {
  display: flex;
  align-items: flex-end;
  padding: 10px 8px 0;
  background: var(--void);
  gap: 3px;
  overflow-x: auto;
  scrollbar-width: none;
  position: relative;
}

#tabs-strip::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: var(--border-dim);
}

#tabs-strip::-webkit-scrollbar { display: none; }

/* ─── TAB ───────────────────────────────────────────────────────────── */

.tab {
  display: flex;
  align-items: center;
  padding: 8px 14px 9px;
  background: transparent;
  border-radius: var(--r-tab);
  border: 1px solid transparent;
  border-bottom: none;
  max-width: 210px;
  min-width: 120px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  cursor: pointer;
  user-select: none;
  color: var(--text-muted);
  position: relative;
  overflow: hidden;

  /* Compositor-only transitions */
  transition:
    color         var(--t-mid) var(--ease-out),
    background    var(--t-mid) var(--ease-out),
    border-color  var(--t-mid) var(--ease-out),
    transform     var(--t-fast) var(--ease-out);

  animation: tab-in var(--t-slow) var(--ease-out) both;
}

/* Tab shimmer on hover — cheap pseudo-element sweep */
.tab::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(255,255,255,0.045) 50%,
    transparent 60%
  );
  transform: translateX(-100%);
  transition: transform 0ms;
  pointer-events: none;
}

.tab:hover::before {
  transform: translateX(100%);
  transition: transform 500ms var(--ease-out);
}

.tab:hover {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-dim);
}

.tab:active {
  transform: translateY(1px);
}

/* Active tab */
.tab.active {
  background: var(--elevated);
  border-color: var(--border);
  color: var(--text-bright);
  z-index: 2;
  font-weight: 500;
}

/* Active tab accent line — aurora gradient */
.tab.active::after {
  content: "";
  position: absolute;
  top: 0; left: 12px; right: 12px;
  height: 2px;
  background: linear-gradient(90deg, var(--aurora-1), var(--aurora-2));
  border-radius: 0 0 3px 3px;
}

/* Active tab — cover the bottom border of strip */
.tab.active {
  margin-bottom: -1px;
  padding-bottom: 10px;
}

.tab-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  margin-right: 6px;
  letter-spacing: 0.015em;
}

.tab-close {
  border: none;
  background: transparent;
  color: var(--text-ghost);
  cursor: pointer;
  font-size: 11px;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition:
    background  var(--t-fast),
    color       var(--t-fast),
    transform   var(--t-fast);
}

.tab-close:hover {
  background: var(--danger-bg);
  color: var(--danger);
  transform: scale(1.15);
}

.tab-close:active {
  transform: scale(0.9);
}

/* Loading indicator — dot on tab favicon */
.tab.loading .tab-favicon {
  animation: favicon-spin 800ms linear infinite;
  opacity: 0.6;
}

/* ─── ADD TAB ───────────────────────────────────────────────────────── */

#add-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-ghost);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  margin-bottom: 3px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition:
    background  var(--t-mid),
    color       var(--t-mid),
    transform   var(--t-fast);
}

#add-tab-btn:hover {
  background: var(--surface);
  color: var(--text);
  transform: rotate(90deg) scale(1.1);
}

#add-tab-btn:active {
  transform: rotate(90deg) scale(0.92);
}

/* ─── NAV BAR ───────────────────────────────────────────────────────── */

#nav-bar {
  background: var(--base);
  padding: 7px 10px 6px;
  display: flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid var(--border-dim);
  position: relative;
}

/* Subtle top highlight line */
#nav-bar::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-lit) 30%, var(--border-lit) 70%, transparent);
  opacity: 0.5;
}

/* ─── NAV ICON BUTTONS ──────────────────────────────────────────────── */

.nav-controls {
  display: flex;
  gap: 2px;
}

.nav-controls button,
#nav-bookmark {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px;
  border-radius: var(--r-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background  var(--t-mid),
    color       var(--t-mid),
    transform   var(--t-fast);
  position: relative;
}

.nav-controls button:hover,
#nav-bookmark:hover {
  background: var(--surface);
  color: var(--text-bright);
}

.nav-controls button:active,
#nav-bookmark:active {
  transform: scale(0.88);
}

/* Bookmark star active — with pop animation */
#nav-bookmark.active {
  color: var(--aurora-4);
}

#nav-bookmark.just-activated {
  animation: bookmark-pop var(--t-slow) var(--ease-out);
}

/* ─── ADDRESS BAR ───────────────────────────────────────────────────── */

#sj-form {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--void);
  border: 1px solid var(--border-dim);
  border-radius: var(--r-pill);
  padding: 0 14px;
  height: 32px;
  position: relative;
  overflow: hidden;
  transition:
    border-color  var(--t-mid),
    background    var(--t-mid);
}

/* Shimmer sweep on focus */
#sj-form::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  width: 60px;
  background: linear-gradient(90deg, transparent, rgba(79,142,247,0.12), transparent);
  transform: translateX(-80px);
  pointer-events: none;
  transition: none;
}

#sj-form:focus-within {
  border-color: var(--aurora-1);
  background: var(--base);
}

#sj-form:focus-within::after {
  transform: translateX(600px);
  transition: transform 500ms var(--ease-out);
}

#sj-address {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-bright);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  outline: none;
  letter-spacing: 0.01em;
}

#sj-address::placeholder {
  color: var(--text-ghost);
}

#sj-address::selection {
  background: rgba(79, 142, 247, 0.25);
}

/* Protocol badge */
#sj-protocol {
  font-size: 11px;
  color: var(--aurora-3);
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.04em;
  flex-shrink: 0;
  opacity: 0.8;
}

/* ─── LOADING BAR ───────────────────────────────────────────────────── */

#loading-bar {
  position: absolute;
  bottom: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--aurora-1), var(--aurora-2), var(--aurora-3));
  transition: width 200ms var(--ease-out);
  pointer-events: none;
  z-index: 10;
}

#loading-bar.loading {
  width: 80%;
}

#loading-bar.done {
  width: 100%;
  opacity: 0;
  transition: width 150ms, opacity 300ms 100ms;
}

/* Traveling shimmer on loading bar */
#loading-bar::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  width: 80px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
  animation: shimmer-bar 1.2s linear infinite;
}

/* ─── BOOKMARK BAR ──────────────────────────────────────────────────── */

#bookmark-bar {
  display: flex;
  align-items: center;
  background: var(--base);
  padding: 3px 12px 5px;
  gap: 1px;
  border-bottom: 1px solid var(--border-dim);
  min-height: 28px;
  overflow-x: auto;
  scrollbar-width: none;
}

#bookmark-bar::-webkit-scrollbar { display: none; }

.bookmark-item {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 11.5px;
  font-weight: 400;
  color: var(--text-muted);
  text-decoration: none;
  background: transparent;
  white-space: nowrap;
  letter-spacing: 0.01em;
  transition:
    background  var(--t-mid),
    color       var(--t-mid),
    transform   var(--t-fast);
}

.bookmark-item:hover {
  background: var(--surface);
  color: var(--text);
  transform: translateY(-1px);
}

.bookmark-item:active {
  transform: translateY(0px);
}

.bookmark-icon {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  opacity: 0.75;
  transition: opacity var(--t-mid);
}

.bookmark-item:hover .bookmark-icon {
  opacity: 1;
}

/* Bookmark bar separator */
.bookmark-sep {
  width: 1px;
  height: 14px;
  background: var(--border-dim);
  margin: 0 4px;
  flex-shrink: 0;
}

/* ─── WEBVIEW ───────────────────────────────────────────────────────── */

#webview-container {
  flex: 1;
  position: relative;
  background: #fff;
  overflow: hidden;
  width: 100%;
}

iframe.sj-frame {
  border: none;
  width: 100%;
  height: 100%;
  display: block;

  /* Fade in when new page loads */
  animation: slide-down var(--t-slow) var(--ease-out) both;
}

/* ─── HOME / NEW TAB PAGE ───────────────────────────────────────────── */

.home-view {
  width: 100%;
  height: 100%;
  background: var(--void);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text);
  position: relative;
  overflow: hidden;
}

/* Aurora orbs — CSS only, transform animated (compositor-safe) */
.home-view::before,
.home-view::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.home-view::before {
  width: 500px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(79,142,247,0.08) 0%, transparent 70%);
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  animation: aurora-drift 8s var(--ease-in-out) infinite;
}

.home-view::after {
  width: 400px;
  height: 250px;
  background: radial-gradient(ellipse, rgba(124,92,252,0.07) 0%, transparent 70%);
  bottom: -60px;
  right: 10%;
  animation: aurora-drift 11s var(--ease-in-out) infinite reverse;
}

/* Home search bar */
.home-search {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  padding: 0 20px;
  height: 46px;
  width: min(580px, 90%);
  gap: 10px;
  position: relative;
  z-index: 1;
  transition: border-color var(--t-mid), background var(--t-mid);
}

.home-search:focus-within {
  border-color: var(--aurora-1);
  background: var(--elevated);
}

.home-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-bright);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;

  /* Gradient text — static, no animation cost */
  background: linear-gradient(135deg, var(--text-bright) 40%, var(--aurora-1) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── SCROLLBARS ────────────────────────────────────────────────────── */

* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
::-webkit-scrollbar           { width: 5px; height: 5px; }
::-webkit-scrollbar-track     { background: transparent; }
::-webkit-scrollbar-thumb     { background: var(--border-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border); }

/* ─── FOCUS VISIBLE ─────────────────────────────────────────────────── */

:focus-visible {
  outline: 2px solid var(--aurora-1);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* ─── UTILITY ───────────────────────────────────────────────────────── */

/* Status dot (e.g. on tab favicon area) */
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--aurora-3);
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}

/* Tooltip */
[data-tip] {
  position: relative;
}
[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--overlay);
  color: var(--text);
  font-size: 11px;
  font-family: var(--font-body);
  padding: 4px 8px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--t-fast), transform var(--t-fast);
  z-index: 100;
}
[data-tip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}