/* SmartBrowser — app.css */
/* Google Material Design language */

:root {
  --g-blue:    #4285F4;
  --g-red:     #EA4335;
  --g-yellow:  #FBBC05;
  --g-green:   #34A853;
  --g-text:    #202124;
  --g-muted:   #5f6368;
  --g-border:  #dfe1e5;
  --g-surface: #f8f9fa;
  --g-white:   #ffffff;
  --g-hover:   #f1f3f4;
  --sidebar-w: 220px;
  --sidebar-collapsed: 64px;
  --nav-h: 56px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 2px 8px rgba(32,33,36,0.15);
}

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

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  color: var(--g-text);
  background: var(--g-surface);
  line-height: 1.5;
}

/* ─── Google color helpers ─── */
.c-blue   { color: var(--g-blue); }
.c-red    { color: var(--g-red); }
.c-yellow { color: var(--g-yellow); }
.c-green  { color: var(--g-green); }

/* ─── App shell ─── */
.sb-app {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ─── */
.sb-sidebar {
  width: var(--sidebar-w);
  background: var(--g-white);
  border-right: 1px solid var(--g-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 200;
  transition: width 0.2s ease;
  overflow: hidden;
}

.sb-sidebar-logo {
  padding: 16px 20px;
  border-bottom: 1px solid var(--g-border);
  min-height: 57px;
  display: flex;
  align-items: center;
}

.sb-logo-link { text-decoration: none; }

.sb-logo-text {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.sb-nav-list { list-style: none; padding: 8px 0; }

.sb-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  color: var(--g-muted);
  text-decoration: none;
  border-radius: 0 24px 24px 0;
  margin-right: 12px;
  font-size: 13px;
  font-weight: 400;
  transition: all 0.15s;
}

.sb-nav-link:hover {
  background: var(--g-hover);
  color: var(--g-text);
}

.sb-nav-link.active {
  background: #e8f0fe;
  color: #1a73e8;
  font-weight: 500;
}

.sb-nav-icon { font-size: 18px; flex-shrink: 0; width: 20px; text-align: center; }
.sb-nav-label { white-space: nowrap; overflow: hidden; }

.sb-divider {
  height: 1px;
  background: var(--g-border);
  margin: 8px 16px;
}

.sb-user-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-top: 1px solid var(--g-border);
  margin-top: auto;
}

.sb-user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--g-blue);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 500;
  flex-shrink: 0;
}

.sb-user-name { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 110px; }
.sb-user-role { font-size: 11px; color: var(--g-muted); }
.sb-user-info { flex: 1; min-width: 0; }
.sb-logout { color: var(--g-muted); font-size: 16px; text-decoration: none; }
.sb-logout:hover { color: var(--g-red); }

/* ─── Main content ─── */
.sb-main {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ─── Top browser bar ─── */
.sb-browser-bar {
  background: var(--g-white);
  border-bottom: 1px solid var(--g-border);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.sb-nav-btn {
  width: 32px; height: 32px;
  border: none;
  background: transparent;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--g-muted);
  font-size: 16px;
  cursor: pointer;
  transition: background 0.15s;
}
.sb-nav-btn:hover:not(:disabled) { background: var(--g-hover); color: var(--g-text); }
.sb-nav-btn:disabled { opacity: 0.35; cursor: default; }

.sb-address-bar {
  flex: 1;
  display: flex;
  align-items: center;
  background: var(--g-surface);
  border: 1px solid var(--g-border);
  border-radius: var(--radius-lg);
  padding: 6px 16px;
  gap: 8px;
  transition: box-shadow 0.15s, border-color 0.15s;
}
.sb-address-bar:focus-within {
  border-color: var(--g-blue);
  box-shadow: 0 0 0 2px rgba(66,133,244,0.15);
  background: var(--g-white);
}

.sb-address-icon { color: var(--g-muted); font-size: 14px; flex-shrink: 0; }
.sb-address-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--g-text);
  outline: none;
  font-family: inherit;
}

.sb-engine-select {
  border: none;
  background: transparent;
  font-size: 12px;
  color: var(--g-muted);
  cursor: pointer;
  outline: none;
  font-family: inherit;
}

/* ─── Tabs bar ─── */
.sb-tabs-bar {
  background: var(--g-surface);
  border-bottom: 1px solid var(--g-border);
  display: flex;
  align-items: flex-end;
  gap: 2px;
  padding: 4px 8px 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.sb-tabs-bar::-webkit-scrollbar { display: none; }

.sb-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--g-hover);
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  font-size: 12px;
  color: var(--g-muted);
  cursor: pointer;
  max-width: 200px;
  min-width: 80px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  user-select: none;
  transition: background 0.1s;
}

.sb-tab.active {
  background: var(--g-white);
  border-color: var(--g-border);
  color: var(--g-text);
  font-weight: 500;
}

.sb-tab-favicon { width: 14px; height: 14px; flex-shrink: 0; }
.sb-tab-title { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.sb-tab-close {
  width: 16px; height: 16px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px;
  flex-shrink: 0;
  opacity: 0;
}
.sb-tab:hover .sb-tab-close,
.sb-tab.active .sb-tab-close { opacity: 1; }
.sb-tab-close:hover { background: var(--g-border); }

.sb-tab-new {
  width: 28px; height: 28px;
  border: none;
  background: transparent;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--g-muted);
  cursor: pointer;
  font-size: 16px;
  flex-shrink: 0;
  margin-bottom: 2px;
}
.sb-tab-new:hover { background: var(--g-hover); color: var(--g-text); }

/* ─── Browser viewport ─── */
.sb-viewport {
  flex: 1;
  position: relative;
  background: var(--g-white);
}

.sb-iframe {
  width: 100%;
  height: calc(100vh - 170px);
  border: none;
  display: block;
}

.sb-newtab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 170px);
  background: var(--g-white);
  padding: 40px 24px;
}

.sb-newtab-logo {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: -2px;
  margin-bottom: 24px;
}

.sb-newtab-search {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--g-white);
  border: 1px solid var(--g-border);
  border-radius: 28px;
  padding: 10px 20px;
  width: 100%;
  max-width: 560px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 40px;
}

.sb-newtab-search input {
  flex: 1; border: none; outline: none;
  font-size: 16px; font-family: inherit; background: transparent;
}

/* ─── Cards ─── */
.sb-card {
  background: var(--g-white);
  border: 1px solid var(--g-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
}

/* ─── Page wrapper ─── */
.sb-page {
  padding: 24px;
  max-width: 1200px;
}

/* ─── Auth pages ─── */
.sb-auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--g-surface);
}
.sb-auth-card {
  background: var(--g-white);
  border: 1px solid var(--g-border);
  border-radius: var(--radius-md);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-sm);
}
.sb-auth-logo {
  text-align: center;
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}
.sb-auth-subtitle {
  text-align: center;
  color: var(--g-muted);
  font-size: 13px;
  margin-bottom: 28px;
}

/* ─── Form controls ─── */
.sb-input {
  display: block;
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--g-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--g-text);
  background: var(--g-white);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.sb-input:focus {
  outline: none;
  border-color: var(--g-blue);
  box-shadow: 0 0 0 2px rgba(66,133,244,0.15);
}

.sb-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--g-text);
  margin-bottom: 6px;
}

/* ─── Buttons ─── */
.sb-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 20px;
  border: 1px solid var(--g-border);
  font-size: 14px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}
.sb-btn-primary {
  background: var(--g-blue);
  color: #fff;
  border-color: var(--g-blue);
}
.sb-btn-primary:hover { background: #1a73e8; border-color: #1a73e8; color: #fff; }
.sb-btn-outline { background: transparent; color: var(--g-text); }
.sb-btn-outline:hover { background: var(--g-hover); }
.sb-btn-danger { background: var(--g-red); color: #fff; border-color: var(--g-red); }
.sb-btn-danger:hover { background: #c5221f; }
.sb-btn-sm { padding: 4px 12px; font-size: 12px; }

/* ─── Dashboard stats ─── */
.sb-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.sb-stat-card {
  background: var(--g-white);
  border: 1px solid var(--g-border);
  border-radius: var(--radius-md);
  padding: 16px;
}
.sb-stat-label { font-size: 12px; color: var(--g-muted); margin-bottom: 4px; }
.sb-stat-value { font-size: 24px; font-weight: 300; color: var(--g-text); }
.sb-stat-icon { font-size: 20px; float: right; }

/* ─── File grid ─── */
.sb-file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.sb-file-card {
  background: var(--g-white);
  border: 1px solid var(--g-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: box-shadow 0.15s, border-color 0.15s;
}
.sb-file-card:hover { box-shadow: var(--shadow-md); border-color: #bdc1c6; }
.sb-file-icon { font-size: 36px; margin-bottom: 8px; }
.sb-file-name { font-size: 12px; color: var(--g-text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sb-file-meta { font-size: 11px; color: var(--g-muted); margin-top: 4px; }

/* ─── Bookmark card ─── */
.sb-bookmark-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--g-border);
}
.sb-bookmark-item:last-child { border-bottom: none; }
.sb-bookmark-favicon { width: 20px; height: 20px; }
.sb-bookmark-title { flex: 1; font-size: 13px; font-weight: 500; }
.sb-bookmark-url { font-size: 11px; color: var(--g-blue); }
.sb-bookmark-cat {
  font-size: 10px; padding: 2px 8px;
  border-radius: 10px;
  background: var(--g-surface);
  color: var(--g-muted);
  border: 1px solid var(--g-border);
}

/* ─── History list ─── */
.sb-history-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.1s;
}
.sb-history-item:hover { background: var(--g-hover); }
.sb-history-title { flex: 1; font-size: 13px; font-weight: 500; }
.sb-history-url { font-size: 11px; color: var(--g-blue); }
.sb-history-time { font-size: 11px; color: var(--g-muted); white-space: nowrap; }

/* ─── AI chat panel ─── */
.sb-ai-panel {
  width: 320px;
  border-left: 1px solid var(--g-border);
  background: var(--g-white);
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--nav-h));
  position: sticky;
  top: var(--nav-h);
}
.sb-ai-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--g-border);
  font-weight: 500;
  display: flex; align-items: center; gap: 8px;
}
.sb-ai-messages { flex: 1; overflow-y: auto; padding: 12px; }
.sb-ai-msg {
  margin-bottom: 12px;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.5;
}
.sb-ai-msg.user { background: #e8f0fe; color: #1a73e8; margin-left: 20px; }
.sb-ai-msg.ai { background: var(--g-surface); border: 1px solid var(--g-border); }
.sb-ai-input-bar {
  padding: 10px 12px;
  border-top: 1px solid var(--g-border);
  display: flex; gap: 6px;
}
.sb-ai-actions {
  display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 12px;
  border-bottom: 1px solid var(--g-border);
}
.sb-ai-action-btn {
  font-size: 11px; padding: 4px 10px;
  border: 1px solid var(--g-border);
  border-radius: 14px;
  background: var(--g-white);
  cursor: pointer;
  transition: all 0.1s;
}
.sb-ai-action-btn:hover { background: #e8f0fe; border-color: var(--g-blue); color: var(--g-blue); }

/* ─── Admin ─── */
.sb-admin-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.sb-admin-table th { background: var(--g-surface); padding: 10px 12px; text-align: left; font-weight: 500; color: var(--g-muted); border-bottom: 1px solid var(--g-border); font-size: 11px; letter-spacing: 0.5px; text-transform: uppercase; }
.sb-admin-table td { padding: 10px 12px; border-bottom: 1px solid var(--g-hover); vertical-align: middle; }
.sb-admin-table tr:hover td { background: var(--g-hover); }

/* ─── Badges ─── */
.sb-badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 500; }
.sb-badge-blue { background: #e8f0fe; color: #1a73e8; }
.sb-badge-green { background: #e6f4ea; color: #137333; }
.sb-badge-red { background: #fce8e6; color: #c5221f; }
.sb-badge-yellow { background: #fef7e0; color: #f9ab00; }
.sb-badge-gray { background: var(--g-surface); color: var(--g-muted); border: 1px solid var(--g-border); }

/* ─── Loading spinner ─── */
.sb-spinner {
  display: inline-block;
  width: 20px; height: 20px;
  border: 2px solid var(--g-border);
  border-top-color: var(--g-blue);
  border-radius: 50%;
  animation: sb-spin 0.7s linear infinite;
}
@keyframes sb-spin { to { transform: rotate(360deg); } }

/* ─── Progress bar ─── */
.sb-progress { height: 4px; background: var(--g-border); border-radius: 2px; overflow: hidden; }
.sb-progress-bar { height: 100%; background: var(--g-blue); border-radius: 2px; transition: width 0.3s; }

/* ─── Search results page ─── */
.sb-search-header {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 24px;
  border-bottom: 1px solid var(--g-border);
  background: var(--g-white);
}
.sb-search-tabs { display: flex; gap: 4px; }
.sb-search-tab {
  padding: 8px 16px;
  border-bottom: 3px solid transparent;
  font-size: 13px; color: var(--g-muted);
  cursor: pointer; text-decoration: none;
}
.sb-search-tab.active { border-bottom-color: var(--g-blue); color: var(--g-blue); }

/* ─── Tooltip ─── */
[data-sb-tooltip] { position: relative; }
[data-sb-tooltip]::after {
  content: attr(data-sb-tooltip);
  position: absolute; bottom: calc(100% + 6px); left: 50%;
  transform: translateX(-50%);
  background: var(--g-text); color: #fff;
  padding: 4px 8px; border-radius: 4px;
  font-size: 11px; white-space: nowrap;
  pointer-events: none; opacity: 0;
  transition: opacity 0.15s;
}
[data-sb-tooltip]:hover::after { opacity: 1; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .sb-ai-panel { display: none; }
}

@media (max-width: 768px) {
  .sb-sidebar {
    width: var(--sidebar-collapsed);
  }
  .sb-nav-label, .sb-user-info, .sb-user-role, .sb-sidebar-logo .sb-logo-text span:not(:first-child) { display: none; }
  .sb-main { margin-left: var(--sidebar-collapsed); }
  .sb-logo-text { font-size: 14px; }
  .sb-page { padding: 16px; }
}

@media (max-width: 480px) {
  .sb-sidebar { transform: translateX(-100%); }
  .sb-sidebar.mobile-open { transform: translateX(0); width: var(--sidebar-w); }
  .sb-main { margin-left: 0; }
  .sb-stat-grid { grid-template-columns: 1fr 1fr; }
}