/* ══════════════════════════════════════════════════════════════
   Yerel Asistan — ChatGPT benzeri arayüz
   Design tokens + layout + components
   ══════════════════════════════════════════════════════════════ */

:root {
  --sidebar-w: 260px;
  --sidebar-collapsed-w: 0px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Code", "Fira Code", Consolas, "Courier New", monospace;
  --transition: 140ms cubic-bezier(.4, 0, .2, 1);
  --message-max-w: 768px;
}

/* ── Dark theme (varsayılan) ── */
[data-theme="dark"] {
  --bg: #1a1a1e;
  --bg-elevated: #242426;
  --bg-hover: #2a2a2d;
  --bg-active: #3a3a3d;
  --bg-input: #242426;
  --sidebar-bg: #242426;
  --sidebar-hover: #3a3a3d;
  --text: #f5f5f5;
  --text-secondary: #8c8c8c;
  --text-tertiary: #666;
  --border: rgba(255, 255, 255, .1);
  --border-strong: #3a3a3d;
  --accent: #0061fe;
  --accent-hover: #0052cc;
  --user-bubble: #0a0a0d;
  --assistant-bubble: #2a2a2d;
  --code-bg: #2a2a2d;
  --code-text: #d73a49;
  --danger: #ff5f5f;
  --shadow: 0 4px 20px rgba(0, 0, 0, .3);
  --scrollbar: #3a3a3d;
  --scrollbar-hover: #4a4a4d;
}

/* ── Light theme ── */
[data-theme="light"] {
  --bg: #ffffff;
  --bg-elevated: #ffffff;
  --bg-hover: #f0f2f5;
  --bg-active: #ebf1f8;
  --bg-input: #fafbfc;
  --sidebar-bg: #f9f9f9;
  --sidebar-hover: #f0f2f5;
  --text: #1a1a1d;
  --text-secondary: #8c8c8c;
  --text-tertiary: #8e8d8c;
  --border: #e4e6e8;
  --border-strong: #d4d4d4;
  --accent: #0061fe;
  --accent-hover: #0052cc;
  --user-bubble: #e3f2fd;
  --assistant-bubble: #f0f0f1;
  --code-bg: #fafafa;
  --code-text: #24292e;
  --danger: #dc2626;
  --shadow: 0 4px 12px rgba(0, 0, 0, .15);
  --scrollbar: #c4c4c4;
  --scrollbar-hover: #a0a0a0;
}

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

html, body {
  height: 100%;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  overflow: hidden;
}

svg {
  width: 20px; height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

input, textarea {
  font-family: inherit;
  color: inherit;
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--scrollbar);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-hover); }

/* ═══ SIDEBAR ═══ */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: width var(--transition), transform var(--transition);
  overflow: hidden;
}
.sidebar.collapsed { width: 0; }

.sidebar-head {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 12px 8px;
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.icon-btn:hover { background: var(--sidebar-hover); color: var(--text); }
.icon-btn.active { background: var(--bg-active); color: var(--text); }

.sidebar-collapse { margin-left: auto; }

/* Arama */
.sidebar-search {
  position: relative;
  display: flex;
  align-items: center;
  margin: 0 12px 10px;
}
.sidebar-search .search-icon {
  position: absolute; left: 10px;
  width: 16px; height: 16px;
  color: var(--text-tertiary);
  pointer-events: none;
}
.sidebar-search input {
  width: 100%;
  padding: 8px 44px 8px 32px;
  background: var(--bg-elevated);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 13px;
  outline: none;
  transition: border-color var(--transition);
}
.sidebar-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 97, 254, .12);
}
.sidebar-search kbd {
  position: absolute; right: 8px;
  padding: 2px 5px;
  font-family: var(--font-sans);
  font-size: 10px;
  color: var(--text-tertiary);
  background: var(--bg-hover);
  border-radius: 4px;
  pointer-events: none;
}

/* Geçmiş */
.history {
  flex: 1;
  overflow-y: auto;
  padding: 0 8px 12px;
}
.history-group { margin-bottom: 14px; }
.history-group:empty { display: none; }
.history-group h3 {
  padding: 6px 10px 4px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: lowercase;
}
.history-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--text-secondary);
  text-align: left;
  transition: background var(--transition), color var(--transition);
}
.history-item:hover { background: var(--sidebar-hover); color: var(--text); }
.history-item.active { background: var(--bg-active); color: var(--text); }
.history-item .title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.history-item .del {
  opacity: 0;
  color: var(--text-tertiary);
  display: grid; place-items: center;
  width: 24px; height: 24px;
  border-radius: 4px;
}
.history-item:hover .del { opacity: 1; }
.history-item .del:hover { background: var(--bg-active); color: var(--danger); }
.history-item .del svg { width: 14px; height: 14px; }

/* Alt kısım */
.sidebar-foot {
  padding: 8px;
  border-top: 1px solid var(--border);
}
.foot-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.foot-row:hover { background: var(--sidebar-hover); color: var(--text); }
.foot-row span { flex: 1; text-align: left; }
.foot-row .chev { width: 16px; height: 16px; }
#themeBtn .moon { display: none; }
[data-theme="light"] #themeBtn .sun { display: none; }
[data-theme="light"] #themeBtn .moon { display: block; }

.user-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--text-secondary);
}
.avatar {
  display: grid; place-items: center;
  width: 28px; height: 28px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
}

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

.topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 52px;
  padding: 0 12px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}
.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}
.model-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition);
}
.model-chip:hover { background: var(--bg-hover); }
.model-chip .chev { width: 16px; height: 16px; color: var(--text-tertiary); }
.only-mobile { display: none; }

.status-dot {
  width: 8px; height: 8px;
  border-radius: var(--radius-full);
  background: var(--text-tertiary);
  transition: background var(--transition);
}
.status-dot.online { background: var(--accent); }
.status-dot.offline { background: var(--danger); }

/* ═══ MESAJ ALANI ═══ */
.chat-scroll {
  flex: 1;
  overflow-y: auto;
  scroll-behavior: smooth;
}
.messages {
  max-width: var(--message-max-w);
  margin: 0 auto;
  padding: 20px 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

/* Mesaj */
.msg { display: flex; gap: 14px; animation: fadeUp 200ms ease-out; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.msg-avatar {
  display: grid; place-items: center;
  width: 28px; height: 28px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 600;
  margin-top: 2px;
}
.msg.user .msg-avatar { background: linear-gradient(135deg, #7c3aed, #2563eb); color: #fff; }
.msg.assistant .msg-avatar { background: linear-gradient(135deg, var(--accent), #0ea5e9); color: #fff; }
.msg-body { flex: 1; min-width: 0; }

/* Kullanıcı: sağa hizalı bubble */
.msg.user { flex-direction: row-reverse; }
.msg.user .msg-body { display: flex; flex-direction: column; align-items: flex-end; }
.msg.user .msg-content {
  background: var(--user-bubble);
  border-radius: 18px 18px 4px 18px;
  padding: 10px 14px;
  max-width: 85%;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .12);
}

/* Asistan: sola hizalı */
.msg.assistant .msg-content { max-width: 100%; }

.msg-model {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .3px;
  margin-bottom: 4px;
}
.msg-content {
  font-size: 15.5px;
  line-height: 1.65;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}
.msg-content p { margin-bottom: 12px; }
.msg-content p:last-child { margin-bottom: 0; }
.msg-content ul, .msg-content ol { margin: 0 0 12px 22px; }
.msg-content li { margin-bottom: 4px; }
.msg-content h1, .msg-content h2, .msg-content h3 {
  margin: 16px 0 8px;
  font-weight: 600;
  line-height: 1.3;
}
.msg-content h1 { font-size: 22px; }
.msg-content h2 { font-size: 19px; }
.msg-content h3 { font-size: 16.5px; }
.msg-content a { color: var(--accent); text-decoration: underline; }
.msg-content blockquote {
  margin: 12px 0;
  padding: 4px 0 4px 14px;
  border-left: 3px solid var(--border-strong);
  color: var(--text-secondary);
}
.msg-content hr { margin: 16px 0; border-color: var(--border); }
.msg-content table {
  width: 100%;
  margin: 12px 0;
  border-collapse: collapse;
  font-size: 14px;
}
.msg-content th, .msg-content td {
  padding: 7px 11px;
  border: 1px solid var(--border);
  text-align: left;
}
.msg-content th { background: var(--bg-hover); font-weight: 600; }

/* Kod */
.msg-content code {
  font-family: var(--font-mono);
  font-size: 13.5px;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 2px 5px;
  border-radius: 4px;
}
.code-block {
  position: relative;
  margin: 12px 0;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.code-block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px;
  background: var(--bg-hover);
  font-size: 12px;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border);
}
.code-block-head .lang { text-transform: uppercase; letter-spacing: .5px; }
.code-copy {
  padding: 3px 8px;
  font-size: 12px;
  border-radius: 5px;
  color: var(--text-secondary);
  transition: background var(--transition);
}
.code-copy:hover { background: var(--bg-active); color: var(--text); }
.code-block pre {
  margin: 0;
  padding: 13px 14px;
  overflow-x: auto;
}
.code-block pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  line-height: 1.55;
}

/* Aksiyon butonları */
.msg-actions {
  display: flex;
  gap: 2px;
  margin-top: 8px;
  opacity: 0;
  transition: opacity var(--transition);
}
.msg:hover .msg-actions { opacity: 1; }
.msg-actions button {
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border-radius: 6px;
  color: var(--text-tertiary);
  transition: background var(--transition), color var(--transition);
}
.msg-actions button:hover { background: var(--bg-hover); color: var(--text); }
.msg-actions button svg { width: 16px; height: 16px; }

/* Ajan araç çıktısı */
.tool-call {
  margin: 8px 0;
  padding: 8px 11px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  font-size: 13px;
}
.tool-call .tool-name {
  font-weight: 600;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.tool-call .tool-detail {
  margin-top: 3px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: pre-wrap;
  max-height: 140px;
  overflow: hidden;
}

/* Yazıyor göstergesi */
.typing { display: inline-flex; gap: 4px; padding: 4px 0; }
.typing span {
  width: 6px; height: 6px;
  border-radius: var(--radius-full);
  background: var(--text-tertiary);
  animation: bounce 1.3s infinite ease-in-out;
}
.typing span:nth-child(2) { animation-delay: .18s; }
.typing span:nth-child(3) { animation-delay: .36s; }
@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: .4; }
  30% { transform: translateY(-5px); opacity: 1; }
}

/* ═══ BOŞ DURUM ═══ */
.empty-state {
  max-width: var(--message-max-w);
  margin: 0 auto;
  padding: 8vh 16px 24px;
  text-align: center;
  animation: fadeUp 300ms ease-out;
}
.empty-state h1 {
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -.5px;
  margin-bottom: 8px;
}
.empty-sub {
  color: var(--text-secondary);
  font-size: 14.5px;
  margin-bottom: 32px;
}
.suggestions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  text-align: left;
}
.suggestion {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: background var(--transition), border-color var(--transition),
              transform var(--transition), box-shadow var(--transition);
}
.suggestion:hover {
  background: var(--bg-hover);
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.sug-icon {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  margin-bottom: 8px;
  font-size: 20px;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
}
.sug-title { font-size: 14px; font-weight: 600; }
.sug-sub { font-size: 12px; color: var(--text-tertiary); }

/* ── Reasoning paneli ── */
.reasoning-panel {
  margin: 0 0 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.reasoning-toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  width: 100%;
  padding: 8px 12px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.reasoning-toggle:hover { background: var(--bg-hover); color: var(--text); }
.reasoning-toggle .chev {
  width: 14px; height: 14px;
  transition: transform var(--transition);
}
.reasoning-panel.open .reasoning-toggle .chev { transform: rotate(90deg); }
.reasoning-body {
  display: none;
  max-height: 300px;
  overflow-y: auto;
  padding: 0 12px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
}
.reasoning-panel.open .reasoning-body { display: block; }
.reasoning-panel.streaming .reasoning-toggle .pulse {
  width: 7px; height: 7px;
  border-radius: var(--radius-full);
  background: var(--accent);
  animation: pulse 1.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: .35; transform: scale(.85); }
  50% { opacity: 1; transform: scale(1.15); }
}

/* Thinking göstergesi (reasoning başlarken) */
.thinking-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ═══ COMPOSER ═══ */
.composer-wrap {
  flex-shrink: 0;
  padding: 0 16px 12px;
  background: linear-gradient(transparent, var(--bg) 22%);
}
.composer {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  max-width: var(--message-max-w);
  margin: 0 auto;
  padding: 8px 8px 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-strong);
  border-radius: 26px;
  box-shadow: var(--shadow);
  transition: border-color var(--transition);
}
.composer:focus-within { border-color: var(--text-tertiary); }
.composer textarea {
  flex: 1;
  max-height: 200px;
  padding: 8px 4px;
  background: none;
  border: none;
  outline: none;
  resize: none;
  font-size: 15px;
  line-height: 1.5;
  overflow-y: auto;
}
.composer textarea::placeholder { color: var(--text-tertiary); }
.composer-icon {
  display: grid; place-items: center;
  width: 34px; height: 34px;
  border-radius: var(--radius-full);
  color: var(--text-tertiary);
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}
.composer-icon:hover { background: var(--bg-hover); color: var(--text); }
.send-btn {
  display: grid; place-items: center;
  width: 34px; height: 34px;
  border-radius: var(--radius-full);
  background: var(--text);
  color: var(--bg);
  flex-shrink: 0;
  transition: opacity var(--transition), transform var(--transition);
}
.send-btn:disabled { opacity: .3; cursor: not-allowed; }
.send-btn:not(:disabled):hover { transform: scale(1.06); }
.send-btn.stopping { background: var(--danger); color: #fff; }
.send-btn.stopping svg { transform: rotate(45deg); }
.composer-note {
  max-width: var(--message-max-w);
  margin: 8px auto 0;
  font-size: 11.5px;
  color: var(--text-tertiary);
  text-align: center;
}

/* ═══ DRAWER ═══ */
.drawer-backdrop {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, .4);
  z-index: 40;
  animation: fade 150ms ease-out;
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.drawer {
  position: fixed;
  top: 0; right: 0;
  width: 340px;
  max-width: 88vw;
  height: 100%;
  background: var(--bg-elevated);
  border-left: 1px solid var(--border);
  z-index: 50;
  display: flex;
  flex-direction: column;
  animation: slideIn 200ms cubic-bezier(.4, 0, .2, 1);
  box-shadow: var(--shadow);
}
/* [hidden] display:flex'i ezer — geri al */
.drawer[hidden], .drawer-backdrop[hidden] { display: none; }
@keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 10px;
}
.drawer-head h2 { font-size: 16px; font-weight: 600; }
.drawer-search { padding: 0 16px 10px; }
.drawer-search input {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-hover);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
}
.drawer-search input:focus { border-color: var(--accent); }

/* Sekmeler (Yerel / Bulut) */
.drawer-tabs {
  display: flex;
  gap: 2px;
  padding: 0 16px 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 6px;
}
.drawer-tab {
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.drawer-tab:hover { background: var(--bg-hover); color: var(--text); }
.drawer-tab.active { background: var(--bg-active); color: var(--text); }
.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 4px 10px 16px;
}
.drawer-foot {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.model-section h3 {
  padding: 12px 8px 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.model-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  text-align: left;
  transition: background var(--transition);
}
.model-item:hover { background: var(--bg-hover); }
.model-item.active { background: var(--bg-active); }
.model-item .m-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.model-item .m-sub {
  font-size: 11px;
  color: var(--text-tertiary);
}
.model-item .m-tag {
  padding: 2px 7px;
  font-size: 10.5px;
  border-radius: var(--radius-full);
  background: var(--bg-active);
  color: var(--text-secondary);
}
.model-item .m-tag.local { background: rgba(16, 163, 127, .18); color: var(--accent); }
.model-item .m-tag.cloud { background: rgba(124, 58, 237, .18); color: #a78bfa; }
.model-item .m-tag.slow {
  background: rgba(245, 158, 11, .16);
  color: #f59e0b;
}

/* Ajan anahtarı */
.agent-switch {
  display: flex;
  align-items: center;
  gap: 11px;
  cursor: pointer;
}
.agent-switch input { display: none; }
.switch {
  position: relative;
  width: 40px; height: 22px;
  flex-shrink: 0;
  background: var(--bg-active);
  border-radius: var(--radius-full);
  transition: background var(--transition);
}
.switch::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 16px; height: 16px;
  border-radius: var(--radius-full);
  background: #fff;
  transition: transform var(--transition);
}
.agent-switch input:checked + .switch { background: var(--accent); }
.agent-switch input:checked + .switch::after { transform: translateX(18px); }
.agent-switch span:last-child { display: flex; flex-direction: column; gap: 1px; }
.agent-switch strong { font-size: 13.5px; font-weight: 600; }
.agent-switch small { font-size: 11.5px; color: var(--text-tertiary); }

/* Ayarlar */
.setting-block { padding: 14px 8px; border-bottom: 1px solid var(--border); }
.setting-block:last-child { border-bottom: none; }
.setting-block h3 {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 10px;
}
.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 13.5px;
}
.badge {
  padding: 2px 8px;
  font-size: 11.5px;
  border-radius: var(--radius-full);
  background: var(--bg-active);
  color: var(--text-secondary);
}
.badge.ok { background: rgba(16, 163, 127, .18); color: var(--accent); }
.badge.bad { background: rgba(239, 68, 68, .18); color: var(--danger); }
.hint { font-size: 12.5px; color: var(--text-secondary); line-height: 1.55; margin-bottom: 8px; }
.code-block {
  display: block;
  padding: 9px 11px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--code-text);
  overflow-x: auto;
  margin-bottom: 8px;
}
.danger-btn {
  width: 100%;
  padding: 9px;
  border: 1px solid var(--danger);
  border-radius: var(--radius-sm);
  color: var(--danger);
  font-size: 13.5px;
  transition: background var(--transition);
}
.danger-btn:hover { background: rgba(239, 68, 68, .12); }

/* Erişim anahtarı girişi */
.key-row { display: flex; gap: 8px; margin-bottom: 8px; }
.key-row input {
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  background: var(--bg-hover);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12.5px;
  outline: none;
}
.key-row input:focus { border-color: var(--accent); }
.key-save {
  padding: 8px 14px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--transition);
}
.key-save:hover { background: var(--accent-hover); }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translateX(-50%);
  padding: 10px 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  font-size: 13.5px;
  box-shadow: var(--shadow);
  z-index: 100;
  animation: fadeUp 200ms ease-out;
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 768px) {
  /* ── Mobil hamburger göster ── */
  .only-mobile { display: grid; }

  /* ── Sidebar: slide-in overlay ── */
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 60;
    width: var(--sidebar-w) !important;
    transform: translateX(-100%);
    box-shadow: 4px 0 24px rgba(0,0,0,.4);
    transition: transform var(--transition);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar.collapsed { width: var(--sidebar-w); }

  /* Sidebar açıkken arka plan karart */
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.45);
    z-index: 59;
    animation: fade 150ms ease-out;
  }

  /* ── Topbar ── */
  .topbar {
    height: 48px;
    padding: 0 8px;
    padding-top: env(safe-area-inset-top);
  }

  /* ── Mesajlar ── */
  .messages { padding: 12px 10px 16px; }
  .message-row { gap: 8px; }

  /* Kullanıcı bubble tam genişlik değil, ama daha geniş */
  .bubble { max-width: 92%; font-size: 15px; }
  .bubble pre, .bubble code { font-size: 13px; }

  /* ── Boş durum ── */
  .empty-state { padding: 5vh 14px 16px; }
  .empty-state h1 { font-size: 22px; }
  .empty-sub { font-size: 14px; }
  .suggestions { grid-template-columns: 1fr 1fr; gap: 8px; }
  .suggestion { padding: 12px 10px; }
  .sug-title { font-size: 13px; }
  .sug-sub { font-size: 11px; }

  /* ── Composer: dokunmatik için büyük hedefler ── */
  .composer-wrap {
    padding: 0 8px;
    padding-bottom: calc(10px + env(safe-area-inset-bottom));
  }
  .composer {
    padding: 6px 6px 6px 12px;
    border-radius: 22px;
  }
  .composer textarea {
    font-size: 16px; /* iOS zoom'u önler (≥16px) */
    max-height: 140px;
    padding: 6px 2px;
  }
  .composer-icon {
    width: 38px;
    height: 38px;
  }
  .send-btn {
    width: 38px;
    height: 38px;
  }
  .composer-note { font-size: 11px; margin-top: 6px; }

  /* ── Drawer: tam genişlik mobilde ── */
  .drawer {
    width: 100% !important;
    max-width: 100% !important;
    border-left: none;
    border-top: 1px solid var(--border);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    top: auto;
    bottom: 0;
    height: 85svh;
    animation: slideUp 220ms cubic-bezier(.4, 0, .2, 1);
  }
  @keyframes slideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }

  .drawer-head { padding: 12px 16px 8px; }
  .drawer-body { padding-bottom: calc(16px + env(safe-area-inset-bottom)); }

  /* ── Tool call paneli ── */
  .tool-call { font-size: 12px; }
  .tool-pre { font-size: 11.5px; }

  /* ── Reasoning paneli ── */
  .reasoning-panel { font-size: 13px; }

  /* ── Attachment chips ── */
  .attach-chip { font-size: 12px; max-width: 160px; }

  /* ── History sidebar items daha büyük dokunma alanı ── */
  .history-item { min-height: 40px; padding: 10px 12px; }
  .history-item .rename-btn,
  .history-item .delete-btn { opacity: 1; } /* Mobilde her zaman görünür */

  /* ── Icon butonları büyüt ── */
  .icon-btn { width: 38px; height: 38px; }

  /* ── Sidebar footer ── */
  .sidebar-foot { padding-bottom: calc(8px + env(safe-area-inset-bottom)); }
}

/* ── Çok küçük ekranlar (≤ 400px) ── */
@media (max-width: 400px) {
  .suggestions { grid-template-columns: 1fr; }
  .empty-state h1 { font-size: 20px; }
  .bubble { max-width: 97%; }
  .drawer { height: 92svh; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ═══ ATTACHMENT STRIP ═══ */
.attach-strip {
  position: absolute;
  top: 56px;
  left: 0;
  right: 0;
  z-index: 5;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
}
.attach-strip.visible {
  opacity: 1;
  pointer-events: auto;
}
.attach-strip.over {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.attach-strip.hidden {
  display: none;
}

.attach-strip.strip-active {
  opacity: 1;
  pointer-events: auto;
}

.attach-strip.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 8px 2px;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  min-height: 32px;
  align-items: flex-end;
}

.attach-strip.chip-row.gap-none {
  gap: 2px;
}

.attach-strip.chip-row.gap-none .attach-chip {
  margin: 0;
}

.attach-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px 8px 2px 4px;
  font-size: 12px;
  white-space: nowrap;
  transition: background var(--transition), border var(--transition);
  max-width: 80%;
  overflow: hidden;
  text-overflow: ellipsis;
  pointer-events: auto;
}

.attach-chip:hover {
  background: var(--bg-active);
  border-color: var(--accent);
}

.attach-chip.remove {
  color: var(--danger);
  padding-right: 20px;
}

.attach-chip.remove:hover {
  color: var(--danger);
}

.attach-chip.remove::after {
  content: "✕";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  cursor: pointer;
}

.attach-chip.remove svg {
  display: none;
}

.attach-thumbnail {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--bg-elevated);
}

.attach-filename {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 11px;
  color: var(--text-tertiary);
  max-width: 120px;
}

.attach-size {
  font-size: 10px;
  color: var(--text-tertiary);
  margin-left: 4px;
}

/* Dropzone overlay */
.dropzone-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 2px dashed var(--accent);
  border-radius: var(--radius-md);
  background: rgba(0, 97, 254, .04);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 2;
  transition: border-color var(--transition), background var(--transition);
}

.dropzone-overlay.over {
  border-color: var(--accent);
  background: rgba(0, 97, 254, .08);
}

.dropzone-overlay .dz-icon {
  width: 40px; height: 40px;
  opacity: .6;
  transition: opacity var(--transition);
}

.dropzone-overlay.over .dz-icon {
  opacity: .9;
}

.dropzone-overlay .dz-text {
  margin-left: 8px;
  font-size: 13px;
  color: var(--accent);
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  .attach-strip,
  .dropzone-overlay {
    transition: none;
  }
}