/* =========================================================
   AETHER · premium chatbot styling
   ========================================================= */

:root {
  --bg: #08090c;
  --bg-2: #0d0f13;
  --surface: #121419;
  --surface-2: #181b22;
  --surface-3: #1e222b;
  --line: #232832;
  --line-strong: #2f3542;
  --text: #ecedee;
  --text-dim: #aeb4bd;
  --muted: #6b7280;
  --accent: #7dd3fc;
  --accent-2: #38bdf8;
  --accent-3: #0ea5e9;
  --accent-glow: rgba(125, 211, 252, 0.35);
  --accent-fade: rgba(125, 211, 252, 0.09);
  --violet: #a78bfa;
  --rose: #fb7185;
  --emerald: #34d399;
  --danger: #f87171;
  --radius: 14px;
  --radius-lg: 18px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35), 0 1px 2px rgba(0,0,0,0.5);
  --shadow-lg: 0 18px 40px rgba(0,0,0,0.55), 0 4px 10px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px var(--accent-glow);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  height: 100%;
  min-height: 100dvh;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(125,211,252,0.08), transparent 70%),
    radial-gradient(ellipse 60% 50% at 90% 100%, rgba(167,139,250,0.05), transparent 70%),
    var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  text-rendering: optimizeLegibility;
  overscroll-behavior: none;
}

body {
  display: flex;
  overflow: hidden;
  letter-spacing: -0.005em;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}
button {
  cursor: pointer;
  background: none;
  border: 0;
  padding: 0;
  -webkit-user-select: none; user-select: none;
  transition: all 0.15s cubic-bezier(.2,.8,.2,1);
}
button:active { transform: scale(0.97); }

a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: var(--accent-2); }

kbd {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--surface-3);
  border: 1px solid var(--line);
  color: var(--muted);
  box-shadow: inset 0 -1px 0 rgba(0,0,0,0.4);
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 10px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--line-strong); }
@media (max-width: 720px) { ::-webkit-scrollbar { width: 0; height: 0; } }

/* =========================================================
   Sidebar
   ========================================================= */
.sidebar {
  width: 288px;
  flex-shrink: 0;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.02), transparent 40%),
    var(--surface);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  transition: transform .25s cubic-bezier(.2,.8,.2,1);
  padding-top: var(--safe-top);
}

.brand {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.brand::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, var(--accent-fade), transparent);
  opacity: 0;
  transition: opacity .4s;
}
.brand:hover::before { opacity: 1; }
.brand-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  box-shadow: 0 0 14px var(--accent-glow), inset 0 -1px 2px rgba(0,0,0,0.3);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 14px var(--accent-glow); }
  50% { box-shadow: 0 0 22px var(--accent-glow), 0 0 4px var(--accent); }
}

.new-chat {
  margin: 12px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-2);
  text-align: left;
  font-weight: 500;
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
.new-chat:hover {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--accent-fade), transparent);
  color: var(--accent);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--accent-fade);
}

.persona-picker {
  padding: 4px 12px 12px;
  border-bottom: 1px solid var(--line);
}
.persona-picker .label {
  font-size: 10px;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: .1em;
  font-weight: 600;
  margin: 8px 4px 8px;
}
.persona-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.persona-item {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-2);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
  cursor: pointer;
}
.persona-item:hover {
  border-color: var(--line-strong);
  color: var(--text);
  background: var(--surface-3);
}
.persona-item.active {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--accent-fade), transparent);
  color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-fade);
}

.session-search { padding: 10px 12px 6px; }
.session-search input {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  padding: 8px 12px;
  font-size: 12.5px;
  outline: none;
  transition: border-color .15s, background .15s;
}
.session-search input:focus {
  border-color: var(--accent);
  background: var(--surface-3);
  box-shadow: 0 0 0 3px var(--accent-fade);
}

.sessions {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px 12px;
}
.session-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  margin-bottom: 2px;
  border-radius: 10px;
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  transition: background .12s, color .12s, transform .12s;
}
.session-item:hover { background: var(--surface-2); color: var(--text); }
.session-item.active {
  background: linear-gradient(90deg, var(--accent-fade), transparent);
  color: var(--accent);
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}
.session-item .label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.session-item .pin-btn { font-size: 12px; opacity: 0; transition: opacity .12s; }
.session-item:hover .pin-btn,
.session-item.pinned .pin-btn { opacity: .7; }
.session-item .pin-btn:hover { opacity: 1; }
.session-item.pinned .label::before { content: '📌 '; }

.sidebar-footer {
  padding: 12px 14px calc(12px + var(--safe-bottom));
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  gap: 8px;
  background: var(--bg-2);
}
.settings-btn {
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-2);
  font-size: 12px;
  color: var(--text-dim);
}
.settings-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-fade);
}
.muted { color: var(--muted); font-size: 11px; }

/* =========================================================
   Main
   ========================================================= */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: calc(10px + var(--safe-top)) 20px 10px;
  border-bottom: 1px solid var(--line);
  background: rgba(12,14,17,0.72);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  position: sticky;
  top: 0;
  z-index: 5;
}
.title {
  flex: 1;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.topbar-meta {
  font-size: 11px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  padding: 4px 10px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--text-dim);
  background: transparent;
  font-size: 16px;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn.danger:hover { background: rgba(248,113,113,0.1); color: var(--danger); }

/* =========================================================
   Messages
   ========================================================= */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 32px 0 20px;
  scroll-behavior: smooth;
}

.empty {
  max-width: 720px;
  margin: 8vh auto 0;
  text-align: center;
  padding: 0 24px;
  animation: fadeUp .5s cubic-bezier(.2,.8,.2,1);
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}
.empty h2 {
  font-size: clamp(32px, 5vw, 46px);
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -0.035em;
  background: linear-gradient(135deg, #f8fafc 0%, var(--accent) 60%, var(--violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 8s ease-in-out infinite;
  background-size: 200% auto;
}
@keyframes shimmer {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}
.empty p {
  margin: 0 0 36px;
  font-size: 14px;
  color: var(--text-dim);
}
.suggestions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.chip {
  padding: 18px 20px;
  border-radius: 14px;
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line);
  text-align: left;
  font-size: 13px;
  color: var(--text-dim);
  position: relative;
  overflow: hidden;
  font-weight: 500;
  line-height: 1.4;
}
.chip::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent, var(--accent-fade) 50%, transparent);
  opacity: 0;
  transition: opacity .3s;
}
.chip:hover {
  border-color: var(--accent);
  color: var(--text);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--accent-fade);
}
.chip:hover::before { opacity: 1; }
.chip:active { transform: translateY(0); }

/* Message bubbles */
.msg {
  max-width: 820px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  gap: 16px;
  animation: msgIn .3s cubic-bezier(.2,.8,.2,1);
}
@keyframes msgIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
.msg .avatar {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 12px;
  box-shadow: var(--shadow-sm);
}
.msg.user .avatar {
  background: linear-gradient(135deg, #475569, #334155);
  color: #e2e8f0;
}
.msg.ai .avatar {
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  color: #031221;
  box-shadow: 0 0 20px var(--accent-glow);
}
.msg .body { flex: 1; min-width: 0; }
.msg .role {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 4px;
  display: flex;
  gap: 8px;
  align-items: center;
  letter-spacing: -0.005em;
}
.msg.ai .role { color: var(--accent); }
.msg .content {
  word-break: break-word;
  line-height: 1.68;
  font-size: 15px;
}
.msg .content > * + * { margin-top: 12px; }
.msg .content h1, .msg .content h2, .msg .content h3 {
  font-weight: 700;
  margin: 20px 0 8px;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.msg .content h1 { font-size: 22px; }
.msg .content h2 { font-size: 18px; }
.msg .content h3 { font-size: 15px; }
.msg .content ul, .msg .content ol { padding-left: 22px; margin: 8px 0; }
.msg .content li { margin: 5px 0; }
.msg .content li::marker { color: var(--accent); }
.msg .content strong { font-weight: 600; color: #fff; }
.msg .content em { font-style: italic; color: var(--text-dim); }
.msg .content blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 14px;
  color: var(--text-dim);
  margin: 14px 0;
  background: var(--accent-fade);
  border-radius: 0 8px 8px 0;
}

.msg .content .md-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 14px 0;
  font-size: 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.msg .content .md-table th, .msg .content .md-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
.msg .content .md-table th {
  background: var(--surface-2);
  font-weight: 600;
  color: var(--text);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.msg .content .md-table tr:last-child td { border-bottom: 0; }
.msg .content .md-table tr:hover td { background: var(--surface-2); }

.msg pre {
  background: #0a0d11 !important;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 36px 14px 14px !important;
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.55;
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, monospace;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.msg pre .lang {
  position: absolute;
  top: 8px; left: 14px;
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 600;
}
.msg pre .copy-code {
  position: absolute;
  top: 6px; right: 6px;
  font-size: 11px;
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  z-index: 1;
}
.msg pre .copy-code:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-fade);
}
.msg pre code { background: transparent !important; padding: 0; }
.msg code {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 0.88em;
  border: 1px solid var(--line);
  color: var(--accent);
}

.msg .msg-images { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.msg .msg-images img {
  max-width: 300px;
  max-height: 240px;
  border-radius: 10px;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
}
.msg .msg-images img:hover { transform: scale(1.01); box-shadow: var(--shadow-lg); }

.msg .inline-media {
  margin: 10px 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface-2);
  max-width: 100%;
  box-shadow: var(--shadow-md);
}
.msg .inline-media img, .msg .inline-media video {
  display: block;
  max-width: 100%;
  height: auto;
  max-height: 600px;
}
.msg .inline-media .media-caption {
  padding: 8px 12px;
  font-size: 11px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  background: var(--surface);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.file-thumb {
  display: flex !important;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  padding: 8px;
  gap: 4px;
}
.file-thumb .file-icon { font-size: 22px; }
.file-thumb .file-name {
  font-size: 9px;
  color: var(--muted);
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 50px;
}

.msg .actions {
  display: flex;
  gap: 6px;
  margin-top: 10px;
  opacity: 0;
  transition: opacity .15s;
}
.msg:hover .actions { opacity: 1; }
.action-btn {
  font-size: 11px;
  color: var(--text-dim);
  padding: 5px 10px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--line);
}
.action-btn:hover { background: var(--surface-3); color: var(--text); border-color: var(--line-strong); }
.action-btn.ok { color: var(--accent); border-color: var(--accent); background: var(--accent-fade); }

.typing-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-left: 4px;
  animation: blink 1.2s infinite;
  box-shadow: 0 0 10px var(--accent-glow);
}
@keyframes blink {
  0%, 60%, 100% { opacity: .25; }
  30% { opacity: 1; }
}

.attachments-preview {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.attachments-preview .thumb {
  position: relative;
  width: 64px;
  height: 64px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  animation: fadeUp .25s ease;
}
.attachments-preview .thumb img { width: 100%; height: 100%; object-fit: cover; }
.attachments-preview .thumb .remove {
  position: absolute;
  top: 3px; right: 3px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 12px;
  display: grid;
  place-items: center;
  backdrop-filter: blur(4px);
}

/* =========================================================
   Composer
   ========================================================= */
.composer {
  border-top: 1px solid var(--line);
  background:
    linear-gradient(0deg, var(--bg) 50%, rgba(8,9,12,0.6) 100%);
  padding: 14px 16px calc(18px + var(--safe-bottom));
  position: sticky;
  bottom: 0;
}
.composer.drag-over {
  background: var(--accent-fade);
}
.composer-inner {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  gap: 6px;
  align-items: flex-end;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 8px;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.composer-inner:focus-within {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-fade), var(--shadow-md);
}
.composer-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  color: var(--text-dim);
  background: transparent;
  font-size: 18px;
  display: grid;
  place-items: center;
}
.composer-btn:hover { background: var(--accent-fade); color: var(--accent); }
.composer-btn.recording {
  background: var(--danger);
  color: #000;
  animation: pulseDanger 1s ease-in-out infinite;
}
@keyframes pulseDanger {
  0%, 100% { box-shadow: 0 0 0 0 rgba(248,113,113,0.6); }
  50% { box-shadow: 0 0 0 6px rgba(248,113,113,0); }
}
#input {
  flex: 1;
  resize: none;
  max-height: 200px;
  min-height: 28px;
  background: transparent;
  color: var(--text);
  border: 0;
  outline: 0;
  font: inherit;
  font-size: 15px;
  line-height: 1.5;
  padding: 10px 8px;
}
#input::placeholder { color: var(--muted); }
.send, .stop {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  color: #031221;
  display: grid;
  place-items: center;
  box-shadow: 0 2px 10px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,0.15);
}
.stop {
  background: var(--danger);
  box-shadow: 0 2px 10px rgba(248,113,113,0.4);
}
.send:hover, .stop:hover { filter: brightness(1.12); transform: translateY(-1px); }
.send:disabled {
  background: var(--line);
  color: var(--muted);
  cursor: not-allowed;
  box-shadow: none;
}
.hint {
  text-align: center;
  margin-top: 10px;
  font-size: 11px;
  color: var(--muted);
}

/* =========================================================
   Drawer (settings)
   ========================================================= */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
  z-index: 10;
}
.overlay.open { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 420px;
  max-width: 92vw;
  background: var(--surface);
  border-left: 1px solid var(--line);
  transform: translateX(100%);
  transition: transform .28s cubic-bezier(.2,.8,.2,1);
  z-index: 11;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
}
.drawer.open { transform: translateX(0); }
.drawer-head {
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
}
.drawer-head h3 {
  flex: 1;
  margin: 0;
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.drawer-body {
  padding: 22px;
  overflow-y: auto;
  flex: 1;
}
.field { margin-bottom: 22px; }
.field label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: .08em;
  font-weight: 600;
  margin-bottom: 8px;
}
.field select, .field textarea, .field input[type="range"], .field input[type="text"] {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 13px;
  outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.field select:focus, .field textarea:focus, .field input[type="text"]:focus {
  border-color: var(--accent);
  background: var(--surface-3);
  box-shadow: 0 0 0 3px var(--accent-fade);
}
.field textarea {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  line-height: 1.5;
  resize: vertical;
  min-height: 100px;
}
.field input[type="range"] {
  padding: 0;
  accent-color: var(--accent);
  height: 28px;
}
.field .mono {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  color: var(--accent);
  font-weight: 600;
}
.save-btn {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  color: #031221;
  border-radius: 10px;
  font-weight: 700;
  font-size: 13px;
  box-shadow: 0 4px 14px var(--accent-glow);
}
.save-btn:hover { filter: brightness(1.1); transform: translateY(-1px); }
.save-btn:active { transform: translateY(0); }

/* =========================================================
   Mobile
   ========================================================= */
@media (max-width: 720px) {
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 12;
    transform: translateX(-100%);
    box-shadow: 0 0 60px rgba(0,0,0,0.7);
    width: 85vw;
    max-width: 320px;
  }
  .sidebar.open { transform: translateX(0); }
  .suggestions { grid-template-columns: 1fr; }
  .drawer { width: 100vw; }
  .msg { padding: 12px 16px; gap: 12px; }
  .msg .avatar { width: 28px; height: 28px; font-size: 11px; }
  .empty { margin-top: 6vh; }
  .empty h2 { font-size: 30px; }
  .topbar { padding: calc(10px + var(--safe-top)) 14px 10px; gap: 8px; }
  .title { font-size: 13px; }
  .topbar-meta { display: none; }
  .composer { padding: 10px 12px calc(14px + var(--safe-bottom)); }
  .composer-inner { padding: 6px; gap: 4px; }
  .composer-btn { width: 38px; height: 38px; font-size: 16px; }
  #input { font-size: 16px; padding: 9px 6px; }
  .send, .stop { width: 38px; height: 38px; }
  .hint { display: none; }
  .attachments-preview { padding: 0 16px; }
}

/* Touch tweaks */
@media (hover: none) and (pointer: coarse) {
  .msg .actions { opacity: 1; }
  .chip:hover { transform: none; }
}

/* =========================================================
   Login overlay (auth gate)
   ========================================================= */
#aether-login {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  padding-top: calc(20px + var(--safe-top));
  padding-bottom: calc(20px + var(--safe-bottom));
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(125,211,252,0.12), transparent 70%),
    radial-gradient(ellipse 50% 50% at 80% 100%, rgba(167,139,250,0.08), transparent 70%),
    var(--bg);
  backdrop-filter: blur(20px);
  animation: fadeUp .3s ease;
}
.al-card {
  width: 100%;
  max-width: 400px;
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 32px 28px;
  box-shadow: var(--shadow-lg);
  animation: fadeUp .4s cubic-bezier(.2,.8,.2,1);
}
.al-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
}
.al-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  box-shadow: 0 0 18px var(--accent-glow);
  animation: pulse 2.6s ease-in-out infinite;
}
.al-title {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.al-card h1 {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 4px;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #f8fafc 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.al-card p {
  margin: 0 0 24px;
  font-size: 14px;
  color: var(--text-dim);
}
#al-form label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 600;
  color: var(--muted);
  margin: 14px 0 6px;
}
#al-form input {
  width: 100%;
  padding: 12px 14px;
  background: var(--surface-3);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font-size: 16px; /* iOS no-zoom */
  outline: none;
  transition: border-color .15s, background .15s, box-shadow .15s;
}
#al-form input:focus {
  border-color: var(--accent);
  background: var(--bg-2);
  box-shadow: 0 0 0 3px var(--accent-fade);
}
.al-err {
  margin-top: 14px;
  padding: 10px 12px;
  background: rgba(248,113,113,0.1);
  border: 1px solid rgba(248,113,113,0.3);
  color: var(--danger);
  border-radius: 10px;
  font-size: 13px;
}
.al-submit {
  width: 100%;
  margin-top: 22px;
  padding: 13px;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  color: #031221;
  border-radius: 10px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 4px 18px var(--accent-glow);
  transition: filter .15s, transform .08s, opacity .15s;
}
.al-submit:hover { filter: brightness(1.1); transform: translateY(-1px); }
.al-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

/* =========================================================
   Admin panel
   ========================================================= */
#aether-admin {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  transition: opacity .22s;
}
#aether-admin.open { pointer-events: auto; opacity: 1; }
.aa-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.aa-panel {
  position: absolute;
  inset: 4vh 4vw;
  max-width: 980px;
  max-height: 92vh;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: scale(.98);
  transition: transform .22s cubic-bezier(.2,.8,.2,1);
}
#aether-admin.open .aa-panel { transform: scale(1); }

.aa-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--surface-2), transparent);
}
.aa-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--accent);
}
.aa-close {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: transparent;
  color: var(--text-dim);
  display: grid;
  place-items: center;
  font-size: 16px;
}
.aa-close:hover { background: var(--surface-2); color: var(--text); }

.aa-tabs {
  display: flex;
  gap: 4px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.aa-tab {
  padding: 8px 16px;
  border-radius: 8px;
  background: transparent;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  border: 1px solid transparent;
}
.aa-tab:hover { background: var(--surface-2); color: var(--text); }
.aa-tab.active {
  background: var(--accent-fade);
  color: var(--accent);
  border-color: var(--accent);
}

.aa-body {
  flex: 1;
  overflow-y: auto;
  padding: 22px;
}
.aa-loading { color: var(--muted); text-align: center; padding: 40px; font-size: 14px; }
.aa-empty { color: var(--muted); text-align: center; padding: 40px; font-size: 14px; }
.aa-err { color: var(--danger); font-size: 13px; padding: 10px 12px; background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.3); border-radius: 10px; margin: 10px 0; }

/* Stats grid */
.aa-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.aa-stat {
  padding: 18px 20px;
  border-radius: 14px;
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.aa-stat::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 90% 10%, var(--accent-fade), transparent 60%);
  opacity: 0.6;
}
.aa-stat-label {
  position: relative;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 6px;
}
.aa-stat-value {
  position: relative;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

/* Forms */
.aa-form { margin-bottom: 16px; }
.aa-form-row {
  display: grid;
  grid-template-columns: 1.5fr 1.3fr 1.2fr 0.8fr auto;
  gap: 8px;
}
.aa-form-row input, .aa-form-row select {
  padding: 10px 12px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.aa-form-row input:focus, .aa-form-row select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-fade);
}

.aa-btn-primary {
  padding: 10px 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  color: #031221;
  border-radius: 10px;
  font-weight: 600;
  font-size: 13px;
  box-shadow: 0 2px 10px var(--accent-glow);
}
.aa-btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.aa-btn-danger {
  padding: 8px 12px;
  background: rgba(248,113,113,0.1);
  border: 1px solid rgba(248,113,113,0.3);
  color: var(--danger);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
}
.aa-btn-danger:hover { background: rgba(248,113,113,0.2); }

/* List items */
.aa-list { display: flex; flex-direction: column; gap: 6px; }
.aa-user, .aa-session {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color .12s, background .12s;
}
.aa-user:hover, .aa-session:hover {
  border-color: var(--line-strong);
  background: var(--surface-3);
}
.aa-user-avatar {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 13px;
  color: var(--text);
}
.aa-user-info, .aa-session-info {
  flex: 1;
  min-width: 0;
}
.aa-user-name, .aa-session-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.aa-user-meta, .aa-session-meta {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.aa-badge {
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.aa-badge-admin { background: rgba(167,139,250,0.15); color: var(--violet); }
.aa-badge-user { background: var(--surface-3); color: var(--text-dim); }

/* Mobile admin panel */
@media (max-width: 720px) {
  .aa-panel { inset: 0; max-height: 100dvh; max-width: 100vw; border-radius: 0; border: none; }
  .aa-head { padding: calc(14px + var(--safe-top)) 16px 14px; }
  .aa-body { padding: 14px; padding-bottom: calc(14px + var(--safe-bottom)); }
  .aa-form-row { grid-template-columns: 1fr; }
  .aa-user, .aa-session { padding: 12px; }
  .aa-stat-value { font-size: 22px; }
}