:root {
  --bg: #0b0d14;
  --surface: rgba(255,255,255,0.04);
  --surface-hover: rgba(255,255,255,0.08);
  --border: rgba(255,255,255,0.06);
  --border-light: rgba(255,255,255,0.1);
  --text: #e2e8f0;
  --text-muted: #64748b;
  --text-dim: #475569;
  --accent: #7c3aed;
  --accent-light: #a855f7;
  --accent-grad: linear-gradient(135deg, #7c3aed, #a855f7);
  --user-bubble: linear-gradient(135deg, #7c3aed, #6d28d9);
  --error: #ef4444;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --font: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
[x-cloak]{display:none!important}

body {
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  display:flex;
  align-items:stretch;
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
}

::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--border-light)}

.hidden{display:none!important}



/* ─── Auth Screen ─── */
.auth-screen {
  width:100%;max-width:420px;margin:auto;padding:24px;
  display:flex;flex-direction:column;align-items:center;
  justify-content:center;min-height:100vh;
}

.auth-card {
  width:100%;
  background:var(--surface);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border:1px solid var(--border);
  border-radius:20px;
  padding:40px 32px 32px;
  box-shadow:var(--shadow);
  animation:fadeUp .4s ease-out;
}

.auth-card h1 {
  font-size:26px;font-weight:700;text-align:center;
  background:var(--accent-grad);-webkit-background-clip:text;
  -webkit-text-fill-color:transparent;background-clip:text;
  margin-bottom:4px;
}

.auth-card p.sub {
  text-align:center;color:var(--text-muted);font-size:14px;
  margin-bottom:28px;
}

.auth-form{display:flex;flex-direction:column;gap:12px}

.auth-form .input-wrap {
  position:relative;
}

.auth-form .input-wrap input {
  width:100%;padding:14px 16px;border-radius:var(--radius);
  border:1px solid var(--border);background:rgba(255,255,255,0.02);
  color:var(--text);font-size:14px;outline:0;transition:border .2s;
  font-family:var(--font);
}

.auth-form .input-wrap input:focus {
  border-color:var(--accent-light);
  background:rgba(124,58,237,0.06);
}

.auth-form .input-wrap input::placeholder{color:var(--text-dim)}

.auth-form button[type="submit"] {
  padding:14px;border-radius:var(--radius);border:0;
  background:var(--accent-grad);color:#fff;font-size:15px;
  font-weight:600;cursor:pointer;transition:opacity .2s,transform .15s;
  margin-top:4px;
}

.auth-form button[type="submit"]:hover{opacity:.9}
.auth-form button[type="submit"]:active{transform:scale(.98)}
.auth-form button[type="submit"]:disabled{opacity:.4;cursor:default;transform:none}

.auth-link{color:var(--text-muted);font-size:13px;text-align:center;margin-top:12px}
.auth-link a{color:var(--accent-light);cursor:pointer;text-decoration:none;font-weight:500}
.auth-link a:hover{text-decoration:underline}

.auth-error{
  color:var(--error);font-size:13px;text-align:center;
  min-height:24px;padding:4px 0;
}

/* ─── Chat Layout ─── */
.app{display:flex;width:100%;height:100%}
.main{flex:1;display:flex;min-width:0;position:relative}
.content{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}

/* ─── Sidebar ─── */
.sidebar {
  width:280px;flex-shrink:0;
  background:rgba(0,0,0,0.2);
  border-right:1px solid var(--border);
  display:flex;flex-direction:column;
  overflow:hidden;
}

.new-chat-btn {
  margin:14px 14px 8px;padding:12px;
  border-radius:var(--radius-sm);
  border:1px solid var(--border);
  background:transparent;color:var(--text);
  font-size:14px;font-family:var(--font);
  cursor:pointer;transition:all .15s;
  font-weight:500;
}

.new-chat-btn:hover {
  background:var(--surface);
  border-color:var(--border-light);
}

.conv-list {
  flex:1;overflow-y:auto;
  padding:4px 8px;
}

.conv-item {
  display:flex;align-items:center;
  padding:10px 12px;border-radius:var(--radius-sm);
  cursor:pointer;transition:background .15s;
  gap:8px;position:relative;
  margin-bottom:2px;
}

.conv-item:hover {
  background:var(--surface);
}

.conv-item.active {
  background:rgba(124,58,237,0.12);
}

.conv-item .conv-title {
  flex:1;font-size:14px;color:var(--text);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

.conv-item .conv-del {
  width:28px;height:28px;border-radius:6px;border:0;
  background:transparent;color:var(--text-dim);
  cursor:pointer;font-size:14px;display:none;
  align-items:center;justify-content:center;
  flex-shrink:0;
}

.conv-item:hover .conv-del {display:flex}
.conv-item .conv-del:hover {color:var(--error);background:rgba(239,68,68,0.1)}

.sidebar-footer {
  padding:10px 14px;border-top:1px solid var(--border);
  font-size:13px;color:var(--text-muted);
  display:flex;align-items:center;gap:8px;
  cursor:pointer;position:relative;transition:background .15s;
  user-select:none;
}
.sidebar-footer:hover{background:var(--surface)}
.sidebar-avatar {
  width:26px;height:26px;border-radius:50%;object-fit:cover;
  flex-shrink:0;
}
.sidebar-user{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sidebar-arrow{font-size:10px;color:var(--text-dim);transition:transform .2s}
.sidebar-footer.open .sidebar-arrow{transform:rotate(180deg)}

.sidebar-toggle {
  display:none;width:36px;height:36px;border-radius:10px;
  border:1px solid var(--border);background:transparent;
  color:var(--text-muted);font-size:18px;cursor:pointer;
  align-items:center;justify-content:center;
}

.light .sidebar {
  background:rgba(0,0,0,0.02);
}

.light .conv-item.active {
  background:rgba(124,58,237,0.08);
}

.light .new-chat-btn:hover {
  background:rgba(0,0,0,0.03);
}

/* ─── Header ─── */
.header {
  height:60px;display:flex;align-items:center;
  justify-content:space-between;
  padding:0 24px;
  border-bottom:1px solid var(--border);
  flex-shrink:0;
}

.header-left{display:flex;align-items:center;gap:12px}
.header-title{font-size:17px;font-weight:600;letter-spacing:-.01em}
.header-title span{background:var(--accent-grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

.header-right{display:flex;align-items:center;gap:16px}
.header-user{font-size:13px;color:var(--text-muted)}
.header-user strong{color:var(--text);font-weight:500}

.btn-logout {
  font-size:13px;color:var(--text-muted);cursor:pointer;
  padding:6px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:transparent;
  transition:all .2s;font-family:var(--font);
}
.btn-logout:hover {
  border-color:var(--error);color:var(--error);
  background:rgba(239,68,68,0.08);
}

/* ─── Messages ─── */
.chat-wrap {
  flex:1;overflow-y:auto;overflow-x:hidden;
  padding:28px 16px 140px;
  display:flex;justify-content:center;
}

#chat {
  width:100%;max-width:780px;
  display:flex;flex-direction:column;gap:6px;
}

.welcome {
  text-align:center;color:var(--text-dim);font-size:14px;
  margin:auto;padding:60px 20px;max-width:400px;
  line-height:1.7;
}

.pending-screen {
  display:flex;flex-direction:column;align-items:center;
  justify-content:center;flex:1;padding:40px;text-align:center;
}
.pending-icon{font-size:48px;margin-bottom:16px}
.pending-screen h2{font-size:20px;font-weight:600;margin-bottom:8px}
.pending-screen p{color:var(--text-muted);max-width:400px;line-height:1.6}
.pending-logout{
  margin-top:24px;padding:10px 24px;border-radius:10px;
  border:1px solid var(--border);background:transparent;
  color:var(--text-muted);cursor:pointer;font-family:var(--font);font-size:14px;
}

.msg {
  display:flex;gap:12px;padding:4px 0;
}

.msg.user{flex-direction:row-reverse}
.msg.ai{flex-direction:row}

.msg-avatar {
  width:34px;flex-shrink:0;display:flex;flex-direction:column;align-items:center;
  margin-top:4px;
}
.msg-avatar-img {
  width:34px;height:34px;border-radius:50%;object-fit:cover;display:block;
}
.msg.user .msg-avatar > span:first-child {
  background:var(--accent-grad);color:#fff;width:34px;height:34px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;
}
.msg.ai .msg-avatar > span:first-child {
  background:rgba(255,255,255,0.08);color:var(--text-muted);width:34px;height:34px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;
  border:1px solid var(--border);
}

.msg-bubble {
  max-width:75%;padding:12px 18px;
  border-radius:var(--radius-lg);
  line-height:1.65;font-size:14px;word-wrap:break-word;
}

.msg.user .msg-bubble {
  background:var(--user-bubble);color:#fff;
  border-bottom-right-radius:4px;
}

.msg.ai .msg-bubble {
  background:var(--surface);
  border:1px solid var(--border);
  border-bottom-left-radius:4px;
}

.msg-bubble p{margin:0 0 8px}
.msg-bubble p:last-child{margin-bottom:0}
.msg-bubble code {
  background:rgba(0,0,0,0.3);padding:2px 6px;
  border-radius:4px;font-size:13px;font-family:'JetBrains Mono','Fira Code',monospace;
}
.msg-bubble pre {
  background:#1e1e2e;padding:14px 16px;padding-right:40px;
  border-radius:var(--radius);overflow-x:auto;
  margin:8px 0;border:1px solid rgba(255,255,255,0.06);
  position:relative;
}
.msg-bubble pre code {
  background:transparent;padding:0;font-size:13px;line-height:1.5;
  font-family:'JetBrains Mono','Fira Code','Cascadia Code',monospace;
}
.msg-bubble pre .copy-btn {
  position:absolute;top:8px;right:8px;
  width:30px;height:30px;border-radius:6px;border:0;
  background:rgba(255,255,255,0.1);color:#aaa;
  cursor:pointer;font-size:14px;
  display:flex;align-items:center;justify-content:center;
  transition:background .15s,opacity .15s;
}
.msg-bubble pre .copy-btn:hover { background:rgba(255,255,255,0.25); color:#fff; }

.light .msg-bubble pre { background:#1e1e2e; border-color:rgba(255,255,255,0.06); }
.light .msg-bubble pre .copy-btn { background:rgba(255,255,255,0.08); color:#ccc; }
.light .msg-bubble pre .copy-btn:hover { background:rgba(255,255,255,0.18); }
.msg-bubble strong{font-weight:600}
.msg-bubble em{font-style:italic}
.msg-bubble a{color:var(--accent-light);text-decoration:none}
.msg-bubble a:hover{text-decoration:underline}
.msg-bubble ul,.msg-bubble ol{padding-left:20px;margin:4px 0}
.msg-bubble li{margin:2px 0}

:root{--ref-aqua:#22d3ee}
.light{--ref-aqua:#0891b2}

.msg-id-under.hide { display:none !important; }
.msg-id-under {
  display:block;font-size:9px;font-weight:700;
  text-align:center;margin-top:2px;opacity:0.7;
  font-family:monospace;letter-spacing:-0.3px;cursor:pointer;
  color:var(--ref-aqua);padding:1px 4px;border-radius:3px;
  transition:opacity .15s;
}
.msg-id-under:hover { opacity:1;text-decoration:underline; }

.mode-toggle {
  font-size:11px;padding:2px 8px;border-radius:4px;border:1px solid var(--border);
  background:transparent;color:var(--text-muted);cursor:pointer;margin-right:8px;
  font-family:monospace;
}
.mode-toggle:hover { border-color:var(--accent);color:var(--accent); }

.ref-link {
  color:var(--ref-aqua);cursor:pointer;font-weight:600;
  background:rgba(34,211,238,0.08);padding:1px 5px;border-radius:4px;
  transition:background .15s;
}
.ref-link:hover { background:rgba(34,211,238,0.18);text-decoration:none; }
.light .ref-link { background:rgba(6,182,212,0.08) }
.light .ref-link:hover { background:rgba(6,182,212,0.18) }

.ref-popup {
  position:fixed;inset:0;z-index:1000;display:flex;align-items:center;justify-content:center;
  background:rgba(0,0,0,0.5);
}
.light .ref-popup { background:rgba(0,0,0,0.25) }
.ref-popup-inner {
  background:var(--bg);border:1px solid var(--border);border-radius:12px;
  max-width:500px;width:90%;max-height:40vh;overflow-y:auto;
  box-shadow:0 8px 40px rgba(0,0,0,0.35);
}
.light .ref-popup-inner { background:#fff;box-shadow:0 8px 40px rgba(0,0,0,0.1) }
.ref-popup-header {
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;border-bottom:1px solid var(--border);
}
.ref-popup-id {
  font-weight:700;font-family:monospace;font-size:13px;
  color:var(--ref-aqua);background:rgba(34,211,238,0.1);
  padding:2px 10px;border-radius:6px;
}
.ref-popup-close {
  background:none;border:none;color:var(--text-muted);font-size:20px;
  cursor:pointer;width:28px;height:28px;border-radius:6px;
  display:flex;align-items:center;justify-content:center;
  transition:background .15s;
}
.ref-popup-close:hover { background:var(--surface-hover);color:var(--text) }
.ref-popup-body { padding:16px;font-size:14px;line-height:1.7;color:var(--text) }

.msg.ai .typing-dots {
  display:inline-flex;align-items:center;gap:3px;
}
.msg.ai .typing-dots span {
  width:6px;height:6px;border-radius:50%;
  background:var(--text-muted);
  animation:dotPulse 1.4s infinite ease-in-out;
}
.msg.ai .typing-dots span:nth-child(1){animation-delay:0s}
.msg.ai .typing-dots span:nth-child(2){animation-delay:.2s}
.msg.ai .typing-dots span:nth-child(3){animation-delay:.4s}

.msg-error {
  text-align:center;color:var(--error);font-size:13px;
  padding:8px;animation:fadeUp .3s ease-out;
}



/* ─── User Dropdown ─── */
.user-dropdown {
  display:none;position:absolute;bottom:100%;left:8px;right:8px;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);
  overflow:hidden;z-index:100;margin-bottom:6px;
  backdrop-filter:blur(20px);
}
.user-dropdown.open{display:block;animation:slideUp .15s ease-out}
.user-dropdown button {
  width:100%;padding:11px 14px;border:0;background:transparent;
  color:var(--text);font-size:14px;text-align:left;cursor:pointer;
  font-family:var(--font);transition:background .1s;
}
.user-dropdown button:hover{background:var(--surface-hover)}
.user-dropdown button:last-child{border-top:1px solid var(--border);color:var(--error)}
.light .user-dropdown{background:rgba(255,255,255,0.96)}

/* ─── Modals ─── */
.modal-overlay {
  position:fixed;inset:0;z-index:200;
  background:rgba(0,0,0,0.6);
  display:flex;align-items:center;justify-content:center;
  backdrop-filter:blur(4px);
  animation:fadeIn .2s ease-out;
}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

.modal-card {
  width:100%;max-width:420px;margin:20px;
  background:var(--surface);border-radius:20px;
  border:1px solid var(--border);box-shadow:var(--shadow);
  overflow:hidden;animation:slideUp .25s ease-out;
}
@keyframes slideUp{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}

.modal-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 24px 0;font-size:18px;font-weight:600;
}
.modal-close{
  width:32px;height:32px;border-radius:8px;border:0;
  background:transparent;color:var(--text-muted);font-size:22px;
  cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:background .15s;
}
.modal-close:hover{background:var(--surface-hover);color:var(--text)}

.modal-body{padding:20px 24px 24px;display:flex;flex-direction:column;gap:18px}

.photo-section{display:flex;align-items:center;gap:16px}
.photo-preview{
  width:72px;height:72px;border-radius:50%;overflow:hidden;flex-shrink:0;
  background:var(--surface-hover);display:flex;align-items:center;justify-content:center;
  border:2px solid var(--border-light);position:relative;
}
.photo-preview img{width:100%;height:100%;object-fit:cover}
.photo-placeholder{font-size:28px;font-weight:600;color:var(--text-dim)}
.photo-upload{cursor:pointer;font-size:14px;color:var(--accent-light);font-weight:500}
.photo-upload input{display:none}
.photo-upload:hover{text-decoration:underline}

.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:13px;color:var(--text-muted);font-weight:500}
.form-group input{
  width:100%;padding:12px 14px;border-radius:var(--radius);
  border:1px solid var(--border);background:rgba(255,255,255,0.03);
  color:var(--text);font-size:14px;outline:0;font-family:var(--font);
  transition:border .2s;
}
.form-group input:focus{border-color:var(--accent-light)}
.form-group input::placeholder{color:var(--text-dim)}
.form-group input:disabled{opacity:.5;cursor:not-allowed}

.form-actions{display:flex;gap:10px;margin-top:4px}
.btn-save{
  flex:1;padding:12px;border-radius:var(--radius);border:0;
  background:var(--accent-grad);color:#fff;font-size:14px;font-weight:600;
  cursor:pointer;transition:opacity .2s;font-family:var(--font);
}
.btn-save:hover{opacity:.9}
.btn-save:active{transform:scale(.98)}
.btn-cancel{
  padding:12px 20px;border-radius:var(--radius);
  border:1px solid var(--border);background:transparent;color:var(--text-muted);
  cursor:pointer;font-size:14px;font-family:var(--font);transition:all .15s;
}
.btn-cancel:hover{border-color:var(--border-light);color:var(--text)}

.modal-status{
  text-align:center;font-size:13px;padding:8px;border-radius:var(--radius-sm);
}
.modal-status.success{background:rgba(34,197,94,0.1);color:#22c55e}
.modal-status.error{background:rgba(239,68,68,0.1);color:var(--error)}
.light .form-group input{background:rgba(0,0,0,0.02)}
.light .modal-card{background:rgba(255,255,255,0.95)}
.light .photo-preview{background:rgba(0,0,0,0.04)}

/* ─── About App Modal ─── */
.modal-card-sm{max-width:360px}
.modal-card-lg{max-width:580px}
.about-body{text-align:center;align-items:center;padding:28px 24px}
.guide-body{padding:20px 24px 28px;max-height:70vh;overflow-y:auto}
.guide-section{margin-bottom:20px}
.guide-section:last-child{margin-bottom:0}
.guide-section h3{font-size:15px;font-weight:600;margin:0 0 6px}
.guide-section p{font-size:14px;line-height:1.6;color:var(--text);margin:0 0 6px}
.guide-section ul{margin:4px 0;padding-left:18px}
.guide-section li{font-size:14px;line-height:1.6;color:var(--text);margin:2px 0}
.guide-section code{font-size:13px;font-weight:600}
.ref-aqua{color:var(--ref-aqua)}
.about-icon{display:flex;align-items:center;justify-content:center;margin-bottom:8px}
.about-body h3{font-size:20px;font-weight:700;margin:0}
.about-version{font-size:13px;color:var(--text-muted);margin:4px 0 12px}
.about-desc{font-size:14px;color:var(--text);line-height:1.6;margin:0 0 16px}
.about-tech{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:16px}
.about-tech span{
  padding:4px 12px;border-radius:20px;font-size:12px;
  background:var(--surface-hover);color:var(--text-muted);
  border:1px solid var(--border);
}
.btn-ok{
  width:100%;padding:12px;border-radius:var(--radius);border:0;
  background:var(--accent-grad);color:#fff;font-size:14px;font-weight:600;
  cursor:pointer;font-family:var(--font);transition:opacity .2s;
}
.btn-ok:hover{opacity:.9}

.typing-dots.stream {
  display:inline-flex;align-items:center;gap:2px;
  margin-left:4px;vertical-align:text-bottom;
}
.typing-dots.stream span {
  width:4px;height:4px;
}

/* ─── Composer ─── */
.composer {
  padding:16px 16px 20px;
  background:linear-gradient(to top,var(--bg) 60%,transparent);
  display:flex;justify-content:center;pointer-events:none;
  flex-shrink:0;
}

.composer-inner {
  width:100%;max-width:780px;
  display:flex;align-items:flex-end;gap:10px;
  pointer-events:auto;
  background:var(--surface);
  backdrop-filter:blur(24px);
  -webkit-backdrop-filter:blur(24px);
  border:1px solid var(--border);
  border-radius:16px;
  padding:8px 8px 8px 18px;
  box-shadow:0 4px 24px rgba(0,0,0,0.3);
  transition:border-color .2s;
}

.composer-inner:focus-within {
  border-color:var(--accent-light);
  box-shadow:0 4px 28px rgba(124,58,237,0.12);
}

#prompt {
  flex:1;border:0;outline:0;background:transparent;
  color:var(--text);font-size:14px;line-height:1.5;
  font-family:var(--font);
  resize:none;max-height:120px;min-height:24px;
  padding:6px 0;
}

#prompt::placeholder{color:var(--text-dim)}

.send-btn {
  width:40px;height:40px;border-radius:12px;border:0;
  background:var(--accent-grad);color:#fff;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;transition:opacity .2s,transform .15s;
  font-size:18px;
}

.send-btn:hover{opacity:.85}
.send-btn:active{transform:scale(.92)}
.send-btn:disabled{opacity:.3;cursor:default;transform:none}

/* ─── Animations ─── */
@keyframes fadeUp {
  from{opacity:0;transform:translateY(8px)}
  to{opacity:1;transform:translateY(0)}
}

@keyframes dotPulse {
  0%,80%,100%{transform:scale(.75);opacity:.4}
  40%{transform:scale(1);opacity:1}
}

/* ─── Model Picker ─── */
.model-info{font-size:14px;color:var(--text-muted);margin:0 0 12px}

.model-select-wrap{position:relative;margin-bottom:8px}
.model-select{
  width:100%;padding:12px 14px;border-radius:10px;
  border:1px solid var(--border);background:var(--surface);
  color:var(--text);font-size:14px;font-family:var(--font);
  cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:8px;
  transition:border .2s;
}
.model-select:hover,.model-select:focus-visible{border-color:var(--border-light);outline:none}
.model-select-arrow{font-size:12px;color:var(--text-dim);transition:transform .2s}
.model-select-arrow.up{transform:rotate(180deg)}

.model-options{
  position:absolute;top:calc(100% + 4px);left:0;right:0;
  background:var(--surface);border:1px solid var(--border);
  border-radius:10px;padding:6px;z-index:20;
  max-height:260px;overflow-y:auto;
  box-shadow:0 8px 32px rgba(0,0,0,0.4);
}
.light .model-options{background:rgba(255,255,255,0.98);box-shadow:0 8px 32px rgba(0,0,0,0.12)}

.model-option{
  display:flex;align-items:center;gap:8px;width:100%;
  padding:10px 12px;border-radius:8px;border:0;
  background:transparent;color:var(--text);font-size:13px;font-family:var(--font);
  cursor:pointer;text-align:left;transition:background .15s;
}
.model-option:hover{background:var(--surface-hover)}
.model-option.active{background:rgba(124,58,237,0.1);color:var(--accent-light)}
.model-option.current{opacity:.5;cursor:default}
.model-option .mo-spec{font-size:11px;color:var(--text-dim);margin-left:auto}
.model-option .mo-badge{font-size:10px;padding:2px 8px;border-radius:10px;background:var(--accent-grad);color:#fff;font-weight:600}
.light .model-option.active{background:rgba(124,58,237,0.08)}

.model-desc{font-size:13px;color:var(--text-muted);margin:0 0 16px;min-height:1.2em}
.model-actions{display:flex;gap:10px;margin-top:4px}

/* ─── Theme Toggle ─── */
.theme-btn {
  width:36px;height:36px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;border:1px solid var(--border);
  background:transparent;color:var(--text-muted);font-size:16px;
  transition:all .2s;font-family:var(--font);
}
.theme-btn:hover{color:var(--text);border-color:var(--border-light)}

/* ─── Light Theme ─── */
.light {
  --bg: #f8f9fc;
  --surface: rgba(255,255,255,0.8);
  --border: rgba(0,0,0,0.06);
  --border-light: rgba(0,0,0,0.12);
  --text: #1e293b;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --user-bubble: linear-gradient(135deg, #7c3aed, #6d28d9);
  --surface-hover: rgba(0,0,0,0.03);
}

.light .msg.ai .msg-avatar > span:first-child {
  background:rgba(0,0,0,0.04);color:var(--text-muted);
  border-color:var(--border);
}

.light .msg.ai .msg-bubble {
  background:#fff;
  border-color:var(--border);
}

.light .send-btn{box-shadow:0 2px 12px rgba(124,58,237,0.2)}

/* ─── Sidebar Overlay ─── */
.sidebar-overlay {
  display:none;position:fixed;inset:0;z-index:99;
  background:rgba(0,0,0,0.5);
  backdrop-filter:blur(4px);
  -webkit-backdrop-filter:blur(4px);
  opacity:0;transition:opacity .25s;
}
.sidebar-overlay.show{display:block;opacity:1}

/* ─── Safe Area ─── */
@supports(padding:max(0px)){
  .composer{padding-bottom:max(20px,env(safe-area-inset-bottom,20px))}
  .sidebar{padding-top:env(safe-area-inset-top,0)}
  .sidebar-footer{padding-bottom:max(10px,env(safe-area-inset-bottom,10px))}
  .modal-body{padding-bottom:max(24px,env(safe-area-inset-bottom,24px))}
}

/* ─── Responsive ─── */
@media(max-width:768px){
  body{padding:0}
  .app{flex-direction:column;height:100dvh}
  .main{flex:1;min-height:0}

  /* ── Sidebar as fullscreen overlay ── */
  .sidebar{
    position:fixed;left:0;top:0;bottom:0;z-index:100;
    width:min(320px,85vw);
    transform:translateX(-100%);
    transition:transform .3s cubic-bezier(.4,0,.2,1);
    box-shadow:4px 0 40px rgba(0,0,0,0.4);
    padding-top:env(safe-area-inset-top,0);
    border-right-color:transparent;
  }
  .sidebar.open{transform:translateX(0)}
  .sidebar-toggle{display:inline-flex}
  .sidebar .conv-item{padding:14px 16px;margin-bottom:1px}
  .sidebar .conv-item .conv-del{display:flex;opacity:.5;width:32px;height:32px}
  .sidebar .conv-item:active{background:var(--surface)}
  .sidebar-footer{padding:14px 16px;padding-bottom:max(14px,env(safe-area-inset-bottom,14px))}

  .sidebar-overlay.show{display:block;opacity:1}

  /* ── Auth ── */
  .auth-screen{padding:16px}
  .auth-card{padding:28px 22px;border-radius:18px;margin:0}
  .auth-card h1{font-size:24px}
  .auth-card p.sub{font-size:13px;margin-bottom:24px}
  .auth-form .input-wrap input{padding:16px 14px;font-size:16px}
  .auth-form button[type="submit"]{padding:16px;font-size:15px}

  /* ── Header ── */
  .header{padding:0 14px;height:54px}
  .header-title{font-size:16px}
  .header-right{gap:6px}
  .btn-logout{padding:5px 10px;font-size:12px;border-radius:8px}
  .theme-btn{width:34px;height:34px;border-radius:8px;font-size:0;padding:0}
  .sidebar-toggle{border-radius:8px;width:34px;height:34px;font-size:16px}

  /* ── Messages ── */
  .chat-wrap{padding:16px 14px 140px}
  #chat{padding:0;gap:6px}
  .msg{gap:10px;padding:4px 0}
  .msg-avatar{width:30px;margin-top:3px}
  .msg-avatar-img{width:30px;height:30px}
  .msg.user .msg-avatar > span:first-child,
  .msg.ai .msg-avatar > span:first-child { width:30px;height:30px;font-size:12px; }
  .msg-bubble{max-width:85%;font-size:15px;padding:12px 16px;line-height:1.6}
  .msg.user .msg-bubble{border-bottom-right-radius:6px}
  .msg.ai .msg-bubble{border-bottom-left-radius:6px}
  .msg-bubble pre{padding:12px 14px;margin:6px 0;font-size:13px}
  .msg-bubble pre .copy-btn{width:28px;height:28px;font-size:12px}

  /* ── Composer ── */
  .composer{padding:8px 12px max(8px,env(safe-area-inset-bottom,8px));background:linear-gradient(to top,var(--bg) 70%,transparent)}
  .composer-inner{padding:4px 4px 4px 16px;border-radius:14px;gap:8px}
  #prompt{font-size:16px;padding:8px 0;max-height:100px;min-height:22px}
  .send-btn{width:40px;height:40px;border-radius:11px;font-size:17px;flex-shrink:0}

  /* ── Modals ── */
  .modal-card{margin:16px;border-radius:18px;max-height:85vh;overflow-y:auto}
  .modal-header{padding:18px 20px 0;font-size:17px}
  .modal-body{padding:18px 20px 22px;gap:16px}
  .photo-preview{width:68px;height:68px}
  .photo-placeholder{font-size:26px}
  .photo-upload{font-size:13px}
  .form-group input{padding:14px;font-size:16px}
  .btn-save{padding:14px;font-size:15px}
  .btn-cancel{padding:14px 18px;font-size:14px}

  /* ── Sidebar inner elements ── */
  .conv-list{padding:6px 8px}
  .new-chat-btn{margin:16px 12px 10px;padding:14px;font-size:14px;border-radius:10px}

  /* ── Misc ── */
  .pending-screen{padding:24px;gap:8px}
  .pending-icon{font-size:40px}
  .pending-screen h2{font-size:18px}
  .pending-screen p{font-size:14px}
  .pending-logout{padding:12px 24px;font-size:14px}
  .about-body{padding:24px 20px}
  .about-icon img{width:40px;height:40px}
  .guide-body{padding:16px 18px 24px}
  .modal-card-lg{max-width:calc(100vw - 32px)}
  .about-body h3{font-size:18px}
  .about-tech span{padding:4px 10px;font-size:11px}

  /* ── User dropdown inside sidebar ── */
  .user-dropdown{left:10px;right:10px;border-radius:14px}
  .user-dropdown button{padding:13px 16px;font-size:15px}
}

/* ─── Extra small ─── */
@media(max-width:420px){
  .sidebar{width:100%}
  .auth-card{padding:24px 18px}
  .auth-card h1{font-size:22px}
  .msg-bubble{max-width:92%;font-size:14px;padding:10px 14px}
  .chat-wrap{padding:12px 10px 130px}
  #chat{gap:4px}
  .msg{gap:8px}
  .header{padding:0 10px;height:50px}
  .composer{padding:6px 8px max(6px,env(safe-area-inset-bottom,6px))}
  .composer-inner{padding:3px 3px 3px 12px;border-radius:12px}
  #prompt{font-size:16px}
  .modal-card{margin:10px;border-radius:16px;max-height:90vh}
  .new-chat-btn{margin:12px 10px 8px;padding:12px}
  .conv-item{padding:12px 14px}
}