@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600;700;800&family=Geist+Mono:wght@400;500&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github-dark.min.css');

:root {
  --font: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'Geist Mono', 'Fira Code', monospace;
  --bg:        #F3F5FC;
  --surface:   #FFFFFF;
  --surface2:  #ECEEF7;
  --border:    #E4E7F5;
  --border2:   #D3D8EE;
  --text:      #14121F;
  --text-2:    #676C85;
  --text-3:    #A6ABC6;
  --accent:    #14121F;
  --accent-hover:#302D40;
  --accent-sub:#14121F0f;
  --user-bubble:#EFEFF4;
  --code-bg:   #15131E;
  --code-header:#1D1B29;
  --chip-bg:   #FFFFFF;
  --chip-hover:#ECEEF7;
  --danger:    #E5484D;
  --ink:       #0D0C14;
  --sidebar-w: 280px;
  --header-h:  58px;
  --radius:    16px;
  --radius-sm: 12px;
  --radius-xs: 9px;
  --transition: 0.18s cubic-bezier(0.4,0,0.2,1);
  --spring: 0.42s cubic-bezier(0.22,1,0.36,1);
}

[data-theme="dark"] {
  --bg:        #0A0A0D;
  --surface:   #17171D;
  --surface2:  #202028;
  --border:    #202024;
  --border2:   #2b2b32;
  --text:      #ececec;
  --text-2:    #8e8ea0;
  --text-3:    #55555f;
  --accent-hover:#3a3742;
  --accent-sub:#ffffff14;
  --user-bubble:#1f1f26;
  --code-bg:   #0d0d0d;
  --code-header:#1a1a1a;
  --chip-bg:   #131318;
  --chip-hover:#1c1c22;
  --ink:       #ececec;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  height: 100dvh;
  overflow: hidden;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}
*, *:focus, *:focus-visible, *:focus-within { outline: none !important; box-shadow: none !important; -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); color: var(--text); }
input, textarea { font-family: var(--font); color: var(--text); background: transparent; border: none; outline: none; resize: none; }
img { display: block; }

#splash {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.5s ease;
}
#splash.fade-out { opacity: 0; pointer-events: none; }
.splash-inner { display: flex; flex-direction: column; align-items: center; gap: 28px; }
.splash-logo {
  width: 60px; height: 60px; object-fit: contain;
  animation: splash-pulse 1.8s ease-in-out infinite;
}
.splash-bar { width: 120px; height: 2px; background: var(--border2); border-radius: 99px; overflow: hidden; }
.splash-fill {
  height: 100%; width: 0%;
  background: var(--accent);
  border-radius: 99px;
  animation: loading-bar 1.8s cubic-bezier(0.4,0,0.2,1) forwards;
}
@keyframes loading-bar { to { width: 100%; } }
@keyframes splash-pulse {
  0%,100% { opacity: 0.5; transform: scale(0.97); }
  50%      { opacity: 1;   transform: scale(1.03); }
}

.login-screen {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg); padding: 20px;
}
.login-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.login-glow {
  position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(20,18,31,0.07) 0%, transparent 70%);
}
.login-card {
  position: relative; z-index: 1;
  width: 100%; max-width: 360px;
  display: flex; flex-direction: column; align-items: center;
  animation: msg-in var(--spring) both;
}
.login-logo { width: 48px; height: 48px; object-fit: contain; margin-bottom: 20px; }
.login-title { font-size: 20px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 6px; text-align: center; }
.login-subtitle { font-size: 14px; color: var(--text-2); margin-bottom: 28px; text-align: center; }
.login-error {
  width: 100%; padding: 10px 14px; border-radius: var(--radius-xs);
  background: rgba(229,72,77,0.08); border: 1px solid rgba(229,72,77,0.24);
  color: #d33339; font-size: 13px; margin-bottom: 14px;
  animation: msg-in 0.2s ease;
}
.login-fields { width: 100%; display: flex; flex-direction: column; gap: 10px; margin-bottom: 14px; }
.login-field { display: flex; flex-direction: column; gap: 5px; }
.login-label { font-size: 12px; font-weight: 500; color: var(--text-2); }
.login-input {
  width: 100%; padding: 11px 14px;
  background: var(--surface); border: 1px solid var(--border2);
  border-radius: var(--radius-sm); font-size: 14px; color: var(--text);
  transition: border-color var(--transition);
}
.login-input:focus { border-color: var(--accent); }
.login-input::placeholder { color: var(--text-3); }
.login-btn-primary {
  width: 100%; padding: 12px; background: var(--accent); color: #fff;
  border-radius: var(--radius-sm); font-size: 14px; font-weight: 600;
  transition: opacity var(--transition), transform 0.1s ease; cursor: pointer;
}
.login-btn-primary:hover { opacity: 0.9; }
.login-btn-primary:active { transform: scale(0.98); }
.login-btn-primary:disabled { opacity: 0.4; cursor: default; }
.login-divider { width: 100%; display: flex; align-items: center; gap: 12px; margin: 16px 0; }
.login-divider::before, .login-divider::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.login-divider span { font-size: 12px; color: var(--text-3); }
.login-btn-google {
  width: 100%; padding: 11px 14px; background: var(--surface); border: 1px solid var(--border2);
  border-radius: var(--radius-sm); font-size: 13px; color: var(--text);
  display: flex; align-items: center; justify-content: center; gap: 10px;
  transition: background var(--transition); cursor: pointer;
}
.login-btn-google:hover { background: var(--chip-hover); }
.login-toggle-text { margin-top: 20px; font-size: 13px; color: var(--text-2); text-align: center; }
.login-link { color: var(--accent); font-size: 13px; background: none; border: none; cursor: pointer; transition: opacity var(--transition); }
.login-link:hover { opacity: 0.75; }
.login-brand { margin-top: 28px; font-size: 10px; color: var(--text-3); letter-spacing: 0.08em; text-transform: uppercase; }

#app { display: flex; height: 100dvh; overflow: hidden; opacity: 0; transition: opacity 0.4s ease; }
#app.visible { opacity: 1; }
.hidden { display: none !important; }

.sidebar-overlay {
  display: none; position: fixed; inset: 0; z-index: 45;
  background: rgba(13,12,20,0.4); backdrop-filter: blur(3px);
  opacity: 0; transition: opacity var(--transition);
}
.sidebar-overlay.active { display: block; opacity: 1; }

.sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  height: 100dvh; overflow: hidden;
  position: fixed; left: 0; top: 0; z-index: 50;
  transform: translateX(-100%);
  transition: transform var(--spring);
}
.sidebar.open { transform: translateX(0); }

.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 14px 14px;
}
.sidebar-brand-row { display: flex; align-items: center; gap: 9px; min-width: 0; }
.sidebar-logo { height: 26px; width: 26px; object-fit: contain; flex-shrink: 0; }
.sidebar-title { font-size: 16px; font-weight: 800; letter-spacing: -0.01em; white-space: nowrap; }

.sidebar-nav { display: flex; flex-direction: column; gap: 2px; padding: 4px 10px 10px; }
.sidebar-nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 10px; border-radius: var(--radius-xs);
  font-size: 14px; font-weight: 500; color: var(--text);
  transition: background var(--transition), transform 0.12s ease;
  width: 100%; text-align: left;
}
.sidebar-nav-item:hover { background: var(--chip-hover); }
.sidebar-nav-item:active { transform: scale(0.98); }
.sidebar-nav-icon { width: 19px; height: 19px; object-fit: contain; flex-shrink: 0; }

.sidebar-section-label {
  font-size: 11px; font-weight: 600; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.08em; padding: 14px 14px 6px;
  border-top: 1px solid var(--border); margin-top: 6px;
}
.chat-list { flex: 1; overflow-y: auto; padding: 2px 8px; scrollbar-width: none; }
.chat-list::-webkit-scrollbar { display: none; }
.chat-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: var(--radius-xs);
  cursor: pointer; transition: background 0.12s ease;
  position: relative;
}
.chat-item:hover { background: var(--chip-hover); }
.chat-item.active { background: var(--accent-sub); }
.chat-item.active::before {
  content: ''; position: absolute; left: -2px; top: 8px; bottom: 8px;
  width: 3px; border-radius: 2px; background: var(--accent);
}
.chat-item.active .chat-item-name { color: var(--text); font-weight: 500; }
.chat-item-icon { flex-shrink: 0; width: 16px; height: 16px; opacity: 0.35; }
.chat-item-name { flex: 1; font-size: 13.5px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-item-project-tag {
  font-size: 10px; font-weight: 700; color: var(--text-2); background: var(--surface2);
  padding: 2px 7px; border-radius: 999px; flex-shrink: 0; white-space: nowrap;
}
.chat-item-actions { display: none; gap: 2px; flex-shrink: 0; }
.chat-item:hover .chat-item-actions { display: flex; }
.chat-action-btn { padding: 3px 5px; border-radius: 4px; color: var(--text-2); font-size: 12px; transition: background var(--transition), color var(--transition); }
.chat-action-btn:hover { background: var(--border); color: var(--text); }
.chat-action-btn.del:hover { color: var(--danger); }

.sidebar-footer { padding: 10px 8px 16px; display: flex; flex-direction: column; gap: 6px; }
.user-pill {
  display: flex; align-items: center; gap: 9px;
  padding: 9px 10px; border-radius: var(--radius-sm); margin-bottom: 2px;
  border: 1px solid var(--border); background: var(--chip-bg);
}
.user-pill-avatar {
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent);
  color: #fff; font-size: 12px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.user-pill-info { flex: 1; display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.user-pill-name { font-size: 12.5px; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-pill-email { font-size: 10.5px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.btn-icon-ghost {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; color: var(--text-2);
  transition: background var(--transition), color var(--transition);
}
.btn-icon-ghost:hover { background: var(--border); color: var(--text); }
.sidebar-brand { font-size: 10px; color: var(--text-3); text-align: center; padding-top: 4px; letter-spacing: 0.06em; }

.main { flex: 1; display: flex; flex-direction: column; height: 100dvh; overflow: hidden; min-width: 0; position: relative; }

.main-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; flex-shrink: 0; position: relative; z-index: 10;
}
.btn-icon-round {
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--ink); color: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.15s ease, background var(--transition);
}
[data-theme="light"] .btn-icon-round { background: var(--ink); color: #fff; }
.btn-icon-round:hover { transform: scale(1.06); }
.btn-icon-round:active { transform: scale(0.92); }

.error-toast-host {
  position: absolute; top: 66px; left: 0; right: 0; z-index: 60;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  pointer-events: none; padding: 0 16px;
}
.app-toast {
  pointer-events: auto;
  display: flex; align-items: center; gap: 10px;
  background: var(--surface); color: var(--text);
  border: 1.5px solid var(--ink); border-radius: 999px;
  padding: 10px 20px 10px 10px; font-size: 14.5px; font-weight: 700;
  box-shadow: 0 10px 30px rgba(13,12,20,0.12);
  animation: toast-drop var(--spring) both;
  max-width: 90vw;
}
[data-theme="dark"] .app-toast { border-color: var(--border2); }
.app-toast.leaving { animation: toast-lift 0.25s cubic-bezier(0.4,0,0.2,1) forwards; }
.app-toast-icon { width: 26px; height: 26px; flex-shrink: 0; object-fit: contain; }
@keyframes toast-drop { from { opacity: 0; transform: translateY(-14px) scale(0.96); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes toast-lift { from { opacity: 1; transform: translateY(0) scale(1); } to { opacity: 0; transform: translateY(-14px) scale(0.96); } }

.messages { flex: 1; overflow-y: auto; scroll-behavior: smooth; scrollbar-width: thin; scrollbar-color: var(--border2) transparent; }
.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }

.welcome {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; min-height: 100%; padding: 40px 20px; text-align: center; gap: 8px;
}
.welcome-logo {
  width: 52px; height: 52px; object-fit: contain;
  animation: welcome-float 3.2s ease-in-out infinite, msg-in var(--spring) both;
}
@keyframes welcome-float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
.welcome-title {
  font-size: clamp(24px, 4.4vw, 34px); font-weight: 800;
  letter-spacing: -0.02em; color: var(--text); margin-top: 10px;
  animation: msg-in var(--spring) 0.05s both;
}
.welcome-subtitle {
  font-size: 16px; color: var(--text-2); font-weight: 500;
  animation: msg-in var(--spring) 0.1s both;
}

.msg-row {
  padding: 8px max(20px, calc(50% - 370px));
  animation: msg-in 0.28s cubic-bezier(0.4,0,0.2,1);
}
@keyframes msg-in { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }

.msg-row.user {
  display: flex; justify-content: flex-end;
  padding-top: 12px; padding-bottom: 4px;
}
.msg-row.user .msg-bubble {
  background: var(--user-bubble);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 18px 18px 4px 18px;
  max-width: 80%;
  font-size: 15px; line-height: 1.6;
  word-break: break-word;
}

.msg-row.assistant {
  display: flex; flex-direction: column;
  padding-top: 20px; padding-bottom: 8px;
  position: relative;
}
.msg-row.assistant .msg-kora-avatar { display: none; }

.msg-actions {
  display: flex; align-items: center; gap: 2px;
  margin-top: 8px; opacity: 0;
  transition: opacity 0.2s ease;
}
.msg-row.assistant.done .msg-actions { opacity: 1; }

.msg-action-btn {
  width: 32px; height: 32px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3); background: transparent; border: none;
  transition: background 0.15s ease, color 0.15s ease, opacity 0.2s ease, transform 0.2s ease;
  cursor: pointer;
}
.msg-action-btn:hover { background: var(--surface2); color: var(--text-2); }
.msg-action-btn.active { color: var(--accent); }
.msg-action-btn.hidden { opacity: 0; pointer-events: none; transform: scale(0.7); }

.sources-btn {
  width: auto; padding: 0 10px; gap: 6px;
  font-size: 12px; font-weight: 600;
}
.sources-count {
  background: var(--surface2); color: var(--text-2);
  border-radius: 999px; font-size: 11px; padding: 1px 6px;
}
.sources-panel {
  position: relative;
  margin-top: 10px;
  display: flex; flex-direction: column; gap: 4px;
  background: var(--surface); border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 8px;
  max-width: 420px;
  animation: sources-in 0.18s ease;
}
@keyframes sources-in { from{opacity:0; transform:translateY(-4px)} to{opacity:1; transform:translateY(0)} }
.source-card {
  display: flex; align-items: center; gap: 10px;
  padding: 8px; border-radius: var(--radius-xs);
  text-decoration: none; color: var(--text);
  transition: background 0.15s ease;
}
.source-card:hover { background: var(--surface2); }
.source-favicon {
  width: 20px; height: 20px; border-radius: 4px; flex-shrink: 0;
  object-fit: contain; background: var(--surface2);
}
.source-info { min-width: 0; }
.source-title {
  font-size: 13px; font-weight: 500; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.source-domain {
  font-size: 12px; color: var(--text-2); margin-top: 1px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.msg-content {
  font-size: 16px; line-height: 1.8; color: var(--text);
}
.msg-content p { margin-bottom: 12px; }
.msg-content p:last-child { margin-bottom: 0; }
.msg-content ul, .msg-content ol { padding-left: 22px; margin: 10px 0; }
.msg-content li { margin: 5px 0; }
.msg-content strong { font-weight: 700; }
.msg-content em { font-style: italic; }
.msg-content h1,.msg-content h2,.msg-content h3 { font-weight: 700; margin: 20px 0 8px; letter-spacing: -0.015em; }
.msg-content h1 { font-size: 20px; }
.msg-content h2 { font-size: 17px; }
.msg-content h3 { font-size: 15px; }
.msg-content a { color: var(--accent); text-decoration: none; }
.msg-content a:hover { text-decoration: underline; }
.msg-content hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

.msg-content table {
  width: 100%; border-collapse: collapse;
  margin: 14px 0; font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs); overflow: hidden;
  display: block; overflow-x: auto;
}
.msg-content th {
  background: var(--surface2); padding: 10px 14px;
  text-align: left; font-weight: 600; font-size: 13px;
  color: var(--text-2); border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.msg-content td {
  padding: 9px 14px; border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.msg-content tr:last-child td { border-bottom: none; }
.msg-content tr:hover td { background: var(--surface2); }

.code-btn {
  padding: 4px 11px; border-radius: 99px; font-size: 11px; font-weight: 600;
  color: #b3b0c4; border: 1px solid rgba(255,255,255,0.1);
  transition: all var(--transition); background: transparent;
}
.code-btn:hover { background: rgba(255,255,255,0.08); color: #fff; }
.msg-content code:not(.hljs) {
  font-family: var(--mono); font-size: 13px;
  background: var(--surface2); border: 1px solid var(--border);
  padding: 2px 6px; border-radius: 4px; color: var(--text);
}

.thinking-row { padding: 20px max(20px, calc(50% - 370px)) 8px; display: flex; flex-direction: column; }
.thinking-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.thinking-label { font-size: 14px; color: var(--text-2); }
.thinking-dots { display: flex; gap: 5px; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--text-3); animation: bounce 1.2s ease infinite; }
.dot:nth-child(2) { animation-delay: 0.2s; }
.dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce { 0%,80%,100%{transform:translateY(0)} 40%{transform:translateY(-5px)} }
.shimmer-block { height: 14px; border-radius: 4px; background: linear-gradient(90deg, var(--border) 25%, var(--border2) 50%, var(--border) 75%); background-size: 200% 100%; animation: shimmer 1.4s infinite; margin: 5px 0; }
@keyframes shimmer { 0%{background-position:200% 0} 100%{background-position:-200% 0} }
.shimmer-block.w-80 { width: 80%; }
.shimmer-block.w-60 { width: 60%; }
.shimmer-block.w-90 { width: 90%; }

.input-area {
  flex-shrink: 0;
  padding: 10px max(16px, calc(50% - 380px)) 14px;
  position: relative;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), padding 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.input-wrapper {
  display: flex; align-items: center; gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 28px;
  padding: 6px 6px 6px 6px;
  box-shadow: 0 2px 14px rgba(13,12,20,0.05);
  transition: border-color var(--transition);
}
.input-wrapper:focus-within { border-color: var(--accent); }
.input-side-btn {
  width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--text); background: var(--surface2);
  transition: background var(--transition), transform 0.15s ease;
}
.input-side-btn:hover { background: var(--border2); }
.input-side-btn:active { transform: scale(0.9) rotate(90deg); }
.user-input {
  flex: 1; font-size: 15.5px; line-height: 1.5;
  max-height: 200px; overflow-y: auto; color: var(--text);
  padding: 8px 4px; scrollbar-width: none; align-self: center;
}
.user-input::-webkit-scrollbar { display: none; }
.user-input::placeholder { color: var(--text-3); }
.mic-send-btn {
  width: 36px; height: 36px; flex-shrink: 0;
  border-radius: 50%; align-self: center;
  background: var(--ink); color: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), transform 0.15s cubic-bezier(0.34,1.56,0.64,1);
  position: relative;
}
[data-theme="light"] .mic-send-btn { color: #fff; }
.mic-send-btn:hover { transform: scale(1.06); }
.mic-send-btn:active { transform: scale(0.9); }
.mic-send-btn.has-text { background: var(--accent); }
.mic-send-btn.stop { background: var(--accent); }
.mic-send-btn svg, .mic-send-btn img { transition: opacity 0.15s ease, transform 0.2s cubic-bezier(0.34,1.56,0.64,1); position: absolute; }
.mic-send-btn img { width: 15px; height: 15px; object-fit: contain; }
[data-theme="light"] .icon-mic { filter: invert(1); }
.icon-send { filter: invert(1); }
.mic-send-btn.listening .icon-mic { filter: invert(1); }
.mic-send-btn .hidden { opacity: 0; transform: scale(0.5) rotate(-20deg); pointer-events: none; }
.mic-send-btn.listening { background: var(--danger); animation: mic-pulse 1.3s ease-out infinite; }
@keyframes mic-pulse {
  0% { box-shadow: 0 0 0 0 rgba(229,72,77,0.45); }
  70% { box-shadow: 0 0 0 12px rgba(229,72,77,0); }
  100% { box-shadow: 0 0 0 0 rgba(229,72,77,0); }
}
.input-disclaimer { font-size: 11.5px; color: var(--text-3); text-align: center; padding-top: 10px; }

.btn-icon {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; color: #fff;
  background: var(--accent);
  transition: background var(--transition), transform 0.15s cubic-bezier(0.34,1.56,0.64,1);
}
.btn-icon:hover { background: var(--accent-hover); }
.btn-icon:active { transform: scale(0.88); }
.btn-primary {
  padding: 11px 18px; border-radius: var(--radius-sm); background: var(--accent); color: #fff;
  font-size: 13px; font-weight: 600; transition: opacity var(--transition); width: 100%; margin-top: 10px;
}
.btn-primary:hover { opacity: 0.9; }
.btn-danger {
  padding: 9px 18px; border-radius: var(--radius-sm);
  border: 1px solid rgba(229,72,77,0.35); color: var(--danger);
  font-size: 13px; font-weight: 600; transition: all var(--transition); width: 100%; margin-top: 8px;
}
.btn-danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger-sm {
  padding: 6px 12px; border-radius: var(--radius-xs);
  border: 1px solid rgba(229,72,77,0.35); color: var(--danger);
  font-size: 12px; font-weight: 600; transition: all var(--transition);
}
.btn-danger-sm:hover { background: var(--danger); color: #fff; border-color: var(--danger); }

.modal {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(13,12,20,0.45); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px; animation: fade-in 0.15s ease;
}
@keyframes fade-in { from{opacity:0} to{opacity:1} }
.modal-box {
  background: var(--surface); border: 1px solid var(--border2);
  border-radius: var(--radius); padding: 22px;
  width: 100%; max-width: 420px; max-height: 80vh; overflow-y: auto;
  animation: msg-in var(--spring);
  box-shadow: 0 24px 60px rgba(13,12,20,0.18);
}
.modal-box.small { max-width: 320px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.modal-header-title { display: flex; align-items: center; gap: 9px; }
.modal-header-icon { width: 18px; height: 18px; object-fit: contain; }
.modal-header h2 { font-size: 15px; font-weight: 700; }
.modal-close {
  width: 28px; height: 28px; border-radius: 50%; background: var(--chip-bg);
  font-size: 11px; color: var(--text-2); display: flex; align-items: center; justify-content: center;
  transition: background var(--transition); border: 1px solid var(--border);
}
.modal-close:hover { background: var(--border2); color: var(--text); }
.memory-list { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.memory-item {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 8px;
  padding: 10px 12px; border-radius: var(--radius-xs);
  background: var(--chip-bg); border: 1px solid var(--border); font-size: 13px;
}
.memory-item-text { flex: 1; line-height: 1.5; }
.memory-del { color: var(--text-3); font-size: 12px; transition: color var(--transition); flex-shrink: 0; }
.memory-del:hover { color: var(--danger); }
.memory-empty { font-size: 13px; color: var(--text-3); text-align: center; padding: 20px 0; }
.settings-row { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.settings-row:last-of-type { border-bottom: none; }
.toggle-group { display: flex; gap: 4px; }
.toggle-btn { padding: 5px 12px; border-radius: var(--radius-xs); font-size: 12px; color: var(--text-2); border: 1px solid var(--border); transition: all var(--transition); }
.toggle-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.settings-info { margin-top: 14px; font-size: 12px; color: var(--text-3); line-height: 1.8; }
.rename-input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--chip-bg); font-size: 14px; color: var(--text); transition: border-color var(--transition);
}
.rename-input:focus { border-color: var(--accent); }

.btn-cancel-inline {
  flex: 1; padding: 10px; border-radius: var(--radius-sm);
  background: var(--surface2); border: 1px solid var(--border2);
  font-size: 13px; color: var(--text-2); font-weight: 600;
  transition: all var(--transition);
}
.btn-cancel-inline:hover { background: var(--chip-hover); color: var(--text); }
.btn-danger-inline {
  flex: 1; padding: 10px; border-radius: var(--radius-sm);
  background: var(--danger); color: #fff;
  font-size: 13px; font-weight: 600;
  transition: opacity var(--transition);
}
.btn-danger-inline:hover { opacity: 0.88; }

@media (max-width: 768px) {
  .msg-row { padding-left: 14px; padding-right: 14px; }
  .thinking-row { padding-left: 14px; padding-right: 14px; }
  .input-area { padding-left: 12px; padding-right: 12px; }
  .msg-row.user .msg-bubble { max-width: 88%; }
}

* { scrollbar-width: thin; scrollbar-color: var(--border2) transparent; }
*::-webkit-scrollbar { width: 4px; height: 4px; }
*::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.tool-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px max(20px, calc(50% - 370px));
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  opacity: 0.75;
}
.tool-indicator-icon {
  width: 14px;
  height: 14px;
  object-fit: contain;
  border-radius: 3px;
}

.settings-list { display: flex; flex-direction: column; gap: 8px; margin-top: 2px; }
.settings-card-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 14px 16px; border-radius: var(--radius-sm); background: var(--surface2);
  transition: background var(--transition);
}
.settings-card-row.clickable { cursor: pointer; }
.settings-card-row.clickable:hover { background: var(--chip-hover); }
.settings-card-row-left { display: flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 600; }
.settings-card-icon { width: 19px; height: 19px; object-fit: contain; flex-shrink: 0; }
.settings-card-sub { font-size: 11.5px; font-weight: 500; color: var(--text-3); margin-top: 2px; }
.settings-badge {
  font-size: 11.5px; font-weight: 700; color: var(--text-2); background: var(--chip-bg);
  border: 1px solid var(--border); padding: 4px 10px; border-radius: 999px; white-space: nowrap;
}
.settings-logout-btn {
  width: 100%; margin-top: 16px; padding: 13px; border-radius: 999px;
  background: rgba(229,72,77,0.1); color: var(--danger); font-weight: 700; font-size: 14px;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  transition: background var(--transition), color var(--transition);
}
.settings-logout-btn:hover { background: var(--danger); color: #fff; }

.projects-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.project-row {
  display: flex; align-items: center; gap: 12px; padding: 12px; border-radius: var(--radius-sm);
  background: var(--chip-bg); border: 1px solid var(--border); cursor: pointer;
  transition: background var(--transition), transform 0.12s ease;
}
.project-row:hover { background: var(--chip-hover); }
.project-row:active { transform: scale(0.99); }
.project-row-icon { width: 20px; height: 20px; object-fit: contain; flex-shrink: 0; }
.project-row-info { flex: 1; min-width: 0; }
.project-row-name { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.project-row-count { font-size: 12px; color: var(--text-2); margin-top: 1px; }
.project-empty { font-size: 13px; color: var(--text-3); text-align: center; padding: 18px 0; }
.project-create-form { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }
.project-textarea {
  width: 100%; min-height: 72px; padding: 10px 12px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--chip-bg); font-size: 13.5px;
  color: var(--text); line-height: 1.5; transition: border-color var(--transition);
}
.project-textarea:focus { border-color: var(--accent); }
.project-detail-header { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.project-detail-name { font-size: 15px; font-weight: 700; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.project-instructions {
  font-size: 13px; color: var(--text-2); background: var(--chip-bg); border: 1px solid var(--border);
  border-radius: var(--radius-xs); padding: 10px 12px; margin: 10px 0 14px; line-height: 1.6;
  white-space: pre-wrap; max-height: 120px; overflow-y: auto;
}
.project-actions-row { display: flex; gap: 8px; margin-top: 6px; }

.info-hero { text-align: center; padding: 4px 0 18px; }
.info-hero img { width: 46px; height: 46px; margin: 0 auto 12px; object-fit: contain; }
.info-hero h3 { font-size: 19px; font-weight: 800; letter-spacing: -0.01em; }
.info-hero .info-tag { font-size: 13px; color: var(--text-2); margin-top: 3px; font-style: italic; }
.info-hero .info-desc { font-size: 13.5px; color: var(--text-2); margin-top: 12px; line-height: 1.65; }
.info-divider { border-top: 1px solid var(--border); margin: 18px 0; }
.info-section-title {
  display: flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-2); margin-bottom: 12px;
}
.info-icon { width: 16px; height: 16px; object-fit: contain; }
.info-feature { margin-bottom: 13px; }
.info-feature:last-child { margin-bottom: 0; }
.info-feature-name { font-size: 14px; font-weight: 700; margin-bottom: 2px; }
.info-feature-desc { font-size: 13px; color: var(--text-2); line-height: 1.6; }
.info-quote {
  font-size: 12.5px; color: var(--text-3); border-left: 2px solid var(--border2);
  padding-left: 10px; margin-top: 10px; line-height: 1.6;
}
.info-footer { font-size: 12px; color: var(--text-3); text-align: center; line-height: 1.85; margin-top: 4px; }
.info-model-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; background: var(--chip-bg); border: 1px solid var(--border);
  border-radius: var(--radius-xs); font-size: 13px; margin-top: 4px;
}

.artifact-card {
  display: flex; align-items: center; gap: 12px;
  width: 100%; max-width: 360px;
  background: var(--code-header); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm); padding: 11px 13px;
  margin: 6px 0; cursor: pointer; text-align: left;
  transition: background 0.15s ease, transform 0.15s ease;
}
.artifact-card:hover { background: #26232f; transform: translateY(-1px); }
.artifact-card:active { transform: scale(0.98); }
.artifact-card-icon {
  width: 36px; height: 36px; border-radius: 9px; background: rgba(255,255,255,0.07);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.artifact-card-icon img { width: 16px; height: 16px; object-fit: contain; filter: invert(1); }
.artifact-card-info { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.artifact-card-name { font-size: 13.5px; font-weight: 600; color: #f2f1f7; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.artifact-card-type { font-size: 11px; color: #8b899c; margin-top: 1px; letter-spacing: 0.05em; }
.artifact-card-chevron { color: #6f6d80; flex-shrink: 0; }

.artifact-box { padding: 0; max-width: 780px; width: 100%; overflow: hidden; }
.artifact-modal-header {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 13px 16px; background: var(--code-header);
}
.artifact-modal-title { display: flex; align-items: center; gap: 10px; min-width: 0; }
.artifact-modal-icon { width: 19px; height: 19px; object-fit: contain; filter: invert(1); flex-shrink: 0; }
.artifact-modal-name { font-size: 13.5px; font-weight: 700; color: #f2f1f7; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 220px; }
.artifact-modal-type { font-size: 11px; color: #8b899c; letter-spacing: 0.05em; margin-top: 1px; }
.artifact-modal-actions { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.artifact-modal-actions .modal-close { background: rgba(255,255,255,0.08); color: #cfcdd9; border-color: rgba(255,255,255,0.14); }
.artifact-modal-actions .modal-close:hover { background: rgba(255,255,255,0.18); color: #fff; }
.artifact-modal-body {
  background: var(--code-bg); margin: 0; padding: 18px 16px;
  overflow: auto; max-height: 72vh;
}
.artifact-modal-body code { font-family: var(--mono); font-size: 13px; line-height: 1.7; }

@media (max-width: 640px) {
  .artifact-box { max-width: 100%; width: 100%; height: 100%; max-height: 100%; border-radius: 0; }
  #artifact-modal { padding: 0; }
  .artifact-modal-body { max-height: none; height: calc(100% - 54px); }
}

.btn-icon-round-img { width: 16px; height: 16px; object-fit: contain; filter: invert(1); }

.model-picker-row { display: flex; align-items: center; gap: 10px; padding: 0 6px 8px; }
.tier-pill {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 12px 6px 8px; border-radius: 999px;
  background: var(--surface2); border: 1px solid var(--border2);
  font-size: 12.5px; font-weight: 700; color: var(--text);
  transition: background var(--transition), transform 0.12s ease;
}
.tier-pill:hover { background: var(--chip-hover); }
.tier-pill:active { transform: scale(0.96); }
.tier-pill img { width: 15px; height: 15px; object-fit: contain; }
.tier-pill svg { color: var(--text-3); margin-left: 1px; }
.usage-mini { flex: 1; max-width: 90px; height: 4px; border-radius: 99px; background: var(--surface2); overflow: hidden; }
.usage-mini-fill { height: 100%; width: 0%; background: var(--ink); border-radius: 99px; transition: width 0.4s cubic-bezier(0.4,0,0.2,1); }

.usage-summary { padding: 2px 0 16px; }
.usage-summary-row { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text-2); margin-bottom: 8px; }
.usage-summary-row strong { color: var(--text); font-size: 14px; }
.usage-bar { height: 7px; border-radius: 99px; background: var(--surface2); overflow: hidden; }
.usage-bar-fill { height: 100%; width: 0%; background: var(--ink); border-radius: 99px; transition: width 0.4s cubic-bezier(0.4,0,0.2,1); }
.usage-reset-label { font-size: 11.5px; color: var(--text-3); margin-top: 7px; }

.tier-list { display: flex; flex-direction: column; gap: 8px; }
.tier-row {
  display: flex; align-items: center; gap: 12px; width: 100%;
  padding: 12px 13px; border-radius: var(--radius-sm);
  background: var(--chip-bg); border: 1.5px solid var(--border);
  text-align: left; transition: background var(--transition), border-color var(--transition), opacity var(--transition);
}
.tier-row:hover { background: var(--chip-hover); }
.tier-row.selected { border-color: var(--ink); }
.tier-row.locked { opacity: 0.55; }
.tier-row-icon-wrap {
  width: 34px; height: 34px; border-radius: 10px; background: var(--surface2);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.tier-row-icon-wrap img { width: 16px; height: 16px; object-fit: contain; }
.tier-row-body { flex: 1; min-width: 0; }
.tier-row-name-line { display: flex; align-items: center; gap: 7px; }
.tier-row-name { font-size: 14px; font-weight: 700; }
.tier-row-mult { font-size: 10.5px; font-weight: 700; color: var(--text-2); background: var(--surface2); padding: 1px 6px; border-radius: 999px; }
.tier-row-desc { font-size: 12px; color: var(--text-2); margin-top: 2px; line-height: 1.5; }
.tier-row-state { flex-shrink: 0; color: var(--text-3); display: flex; align-items: center; }
.tier-row.selected .tier-row-state { color: var(--ink); }

.switch {
  width: 40px; height: 24px; border-radius: 999px; background: var(--border2);
  position: relative; flex-shrink: 0; transition: background var(--transition);
}
.switch .switch-knob {
  position: absolute; top: 2px; left: 2px; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,0.25);
  transition: transform 0.22s cubic-bezier(0.34,1.56,0.64,1);
}
.switch.on { background: var(--ink); }
.switch.on .switch-knob { transform: translateX(16px); }

[data-theme="light"] .btn-icon-round-img { filter: invert(1); }

[data-theme="dark"] .tier-pill img,
[data-theme="dark"] .tier-row-icon-wrap img,
[data-theme="dark"] .splash-logo,
[data-theme="dark"] .login-logo,
[data-theme="dark"] .sidebar-logo,
[data-theme="dark"] .welcome-logo,
[data-theme="dark"] .msg-kora-avatar img,
[data-theme="dark"] .sidebar-nav-icon,
[data-theme="dark"] .modal-header-icon,
[data-theme="dark"] .app-toast-icon,
[data-theme="dark"] .info-icon,
[data-theme="dark"] .project-row-icon {
  filter: invert(1);
}