/* ============ ПЕРЕМЕННЫЕ ============ */
:root {
  --bg:          #212121;
  --sidebar-bg:  #171717;
  --panel:       #2f2f2f;
  --panel-2:     #424242;
  --border:      #3a3a3a;
  --border-soft: #2a2a2a;
  --text:        #ececec;
  --text-dim:    #b4b4b4;
  --text-faint:  #858585;
  --accent:      #10a37f;
  --accent-hov:  #0d8a6b;
  --user-bubble: #2f2f2f;
  --user-accent: #5436da;
  --danger:      #ef4146;
  --code-bg:     #0d1117;
  --code-inline: #3a3a3a;
  --radius:      12px;
  --shadow:      0 10px 30px rgba(0,0,0,.35);
}

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

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button { font: inherit; color: inherit; }

/* ============ КАРКАС ============ */
.app { display: flex; height: 100vh; overflow: hidden; }

/* ============ САЙДБАР ============ */
.sidebar {
  width: 260px;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-soft);
  flex-shrink: 0;
  transition: margin-left .2s ease;
}
.sidebar-header { padding: 12px; }
.sidebar-footer {
  margin-top: auto;
  padding: 10px 12px;
  border-top: 1px solid var(--border-soft);
}
.new-chat-btn, .settings-btn {
  width: 100%;
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  transition: background .15s, border-color .15s;
}
.new-chat-btn:hover, .settings-btn:hover {
  background: var(--panel);
  border-color: var(--panel-2);
}
.chat-list { flex: 1; overflow-y: auto; padding: 4px 8px 8px; }
.chat-list:empty::after {
  content: 'История чатов появится здесь';
  display: block;
  color: var(--text-faint);
  font-size: 12px;
  padding: 16px 8px;
  text-align: center;
}
.chat-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 2px;
  transition: background .12s, color .12s;
}
.chat-item:hover { background: var(--panel); color: var(--text); }
.chat-item.active { background: var(--panel); color: var(--text); }
.chat-title {
  flex: 1; min-width: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  margin-right: 6px;
}
.chat-del {
  background: transparent; border: 0;
  color: var(--text-faint);
  cursor: pointer; padding: 2px 6px; border-radius: 4px;
  font-size: 14px; line-height: 1;
  opacity: 0; transition: opacity .12s, background .12s, color .12s;
}
.chat-item:hover .chat-del { opacity: 1; }
.chat-del:hover { background: #5a1f22; color: #fff; }

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

.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg);
  flex-shrink: 0;
}
.topbar-spacer { flex: 1; }
.model-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  background: var(--panel);
  border-radius: 999px;
  font-size: 13px; font-weight: 500;
  color: var(--text);
}
.dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

/* RPM-пилюля (счётчик запросов к NVIDIA API за 60с) */
.rpm-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  transition: color .2s, border-color .2s, background .2s;
  cursor: default;
  user-select: none;
}
.rpm-pill svg { color: var(--accent); transition: color .2s; }
.rpm-pill .rpm-unit { color: var(--text-faint); font-size: 11px; }
/* Цветовые пороги: зелёный / жёлтый / красный
   (ориентировочно под лимиты бесплатного уровня NVIDIA NIM) */
.rpm-pill.ok      { color: var(--text); border-color: var(--border); }
.rpm-pill.ok svg  { color: #3dd68c; }
.rpm-pill.warn    { color: #ffd479; border-color: #665529; background: #2a2512; }
.rpm-pill.warn svg{ color: #ffb454; }
.rpm-pill.crit    { color: #ff9ea0; border-color: #6b2a2c; background: #2a1415; }
.rpm-pill.crit svg{ color: var(--danger); }
.rpm-pill.pulse   { animation: rpmPulse .8s ease-out; }
@keyframes rpmPulse {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.08); }
  100% { transform: scale(1); }
}
.icon-btn {
  background: transparent; border: 0;
  color: var(--text);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  transition: background .12s;
}
.icon-btn:hover { background: var(--panel); }

/* ============ СООБЩЕНИЯ ============ */
.messages {
  flex: 1; overflow-y: auto;
  padding: 24px 0 0;
  scroll-behavior: smooth;
}
.welcome {
  max-width: 760px;
  margin: clamp(48px, 12vh, 140px) auto 0;
  text-align: center;
  padding: 0 24px;
}
.welcome h1 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  margin-bottom: 10px;
  font-weight: 600;
  background: linear-gradient(135deg, #fff 0%, #b4b4b4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.welcome p { color: var(--text-dim); margin-bottom: 28px; }
.suggestions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  max-width: 640px;
  margin: 0 auto;
}
.suggest {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 13px;
  text-align: left;
  transition: background .12s, border-color .12s, transform .12s;
}
.suggest:hover {
  background: var(--panel-2);
  border-color: var(--panel-2);
  transform: translateY(-1px);
}

.msg {
  max-width: 820px; margin: 0 auto 24px; padding: 0 24px;
  display: flex; gap: 14px;
  animation: msgIn .2s ease-out;
}
@keyframes msgIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.avatar {
  flex-shrink: 0;
  width: 30px; height: 30px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
  color: #fff;
  user-select: none;
}
.msg-user .avatar { background: var(--user-accent); }
.msg-assistant .avatar { background: var(--accent); }
.bubble { flex: 1; min-width: 0; line-height: 1.65; padding-top: 2px; }

.msg-user .bubble .content {
  background: var(--user-bubble);
  padding: 10px 16px;
  border-radius: 18px;
  display: inline-block;
  max-width: 100%;
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* Markdown */
.content p { margin-bottom: 12px; }
.content p:last-child { margin-bottom: 0; }
.content h1, .content h2, .content h3, .content h4 {
  margin: 18px 0 8px; font-weight: 600; line-height: 1.3;
}
.content h1 { font-size: 1.5em; }
.content h2 { font-size: 1.3em; }
.content h3 { font-size: 1.15em; }
.content h4 { font-size: 1.05em; }
.content ul, .content ol { margin: 0 0 12px 24px; }
.content li { margin-bottom: 4px; }
.content a { color: #7cb3ff; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
.content a:hover { color: #a6ccff; }
.content strong { font-weight: 600; }
.content em { font-style: italic; }
.content hr { border: 0; border-top: 1px solid var(--border); margin: 14px 0; }

.content code {
  background: var(--code-inline);
  padding: 2px 6px;
  border-radius: 5px;
  font-family: "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
}
.content pre {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 14px 14px 14px;
  overflow-x: auto;
  margin: 12px 0;
}
.content pre code {
  background: transparent; padding: 0; border-radius: 0;
  font-size: 0.88em;
  color: #e6edf3;
  line-height: 1.55;
  display: block;
}
.copy-btn {
  position: absolute; top: 8px; right: 8px;
  background: #2a2f36;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s, background .15s, color .15s;
}
.content pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover { background: #3a4049; color: var(--text); }
.copy-btn.copied { color: var(--accent); border-color: var(--accent); }

.content blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 14px;
  color: var(--text-dim);
  margin: 10px 0;
}
.content table {
  border-collapse: collapse;
  margin: 12px 0;
  display: block;
  overflow-x: auto;
  max-width: 100%;
}
.content th, .content td {
  border: 1px solid var(--border);
  padding: 7px 12px;
  text-align: left;
}
.content th { background: var(--panel); font-weight: 600; }

/* Reasoning / мысли */
.reasoning {
  background: #1a1a1a;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
  padding: 8px 14px;
  color: var(--text-dim);
  font-size: 0.92em;
}
.reasoning summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--text-dim);
  user-select: none;
  padding: 4px 0;
  display: flex; align-items: center; gap: 6px;
  list-style: none;
}
.reasoning summary::before {
  content: '🧠';
  font-size: 14px;
}
.reasoning summary::-webkit-details-marker { display: none; }
.reasoning[open] summary { color: var(--text); margin-bottom: 6px; }
.reasoning-body {
  padding-top: 6px;
  border-top: 1px solid var(--border-soft);
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  line-height: 1.55;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: var(--text-faint);
  max-height: 400px;
  overflow-y: auto;
}

/* Прикреплённые файлы в сообщении */
.msg-files { margin-bottom: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--panel);
  padding: 5px 10px;
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--border);
}

/* Мигающий курсор стрима */
.streaming::after {
  content: '▍';
  display: inline-block;
  margin-left: 2px;
  animation: blink 1s steps(2, start) infinite;
  color: var(--accent);
}
@keyframes blink { to { visibility: hidden; } }

/* ============ КОМПОЗЕР ============ */
.composer-wrap {
  padding: 8px 0 16px;
  background: var(--bg);
  flex-shrink: 0;
}
.composer {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}
.composer.drag .input-row {
  border-color: var(--accent);
  background: rgba(16, 163, 127, 0.08);
}
.attachments {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: 8px;
}
.attachments:empty { display: none; }
.attachment {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 13px;
  max-width: 100%;
}
.att-name {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-width: 220px;
}
.att-meta { color: var(--text-faint); font-size: 11px; }
.att-del {
  background: transparent; border: 0;
  color: var(--text-faint);
  cursor: pointer; padding: 0 4px;
  font-size: 16px; line-height: 1;
}
.att-del:hover { color: var(--danger); }

.input-row {
  display: flex; align-items: flex-end; gap: 4px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 6px 6px 6px 6px;
  transition: border-color .15s, background .15s;
}
.input-row:focus-within {
  border-color: var(--panel-2);
  box-shadow: 0 0 0 1px var(--panel-2);
}
.attach-btn { margin: 4px; color: var(--text-dim); }
.attach-btn:hover { color: var(--text); background: var(--panel-2); }

#input {
  flex: 1;
  background: transparent;
  border: 0;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  resize: none;
  outline: none;
  padding: 10px 6px;
  max-height: 240px;
  line-height: 1.5;
}
#input::placeholder { color: var(--text-faint); }

.send-btn {
  background: var(--text);
  color: #000;
  border: 0;
  width: 34px; height: 34px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: opacity .15s, background .15s, transform .1s;
  margin: 2px;
}
.send-btn:hover { opacity: 0.85; }
.send-btn:active { transform: scale(0.95); }
.send-btn:disabled {
  background: var(--panel-2);
  color: var(--text-faint);
  cursor: not-allowed;
}
.send-btn.stop { background: var(--text); color: #000; }

.hint {
  text-align: center;
  color: var(--text-faint);
  font-size: 12px;
  margin-top: 10px;
}

/* ============ МОДАЛКА ============ */
.modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.65);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.modal.open { display: flex; animation: fade .15s ease-out; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal-content {
  background: var(--panel);
  border-radius: 14px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  animation: pop .18s ease-out;
}
@keyframes pop { from { transform: scale(0.96); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h2 { font-size: 17px; font-weight: 600; }
.modal-body { padding: 18px 20px 22px; overflow-y: auto; }

.field { margin-bottom: 18px; }
.field > label {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 6px;
  color: var(--text); font-size: 13px; font-weight: 500;
}
.field .val {
  color: var(--accent);
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 12px;
  background: var(--bg);
  padding: 2px 8px;
  border-radius: 6px;
}
.field .sub {
  color: var(--text-faint);
  font-size: 12px;
  margin-top: 6px;
}
.field textarea, .field input[type=text] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  resize: vertical;
  outline: none;
  transition: border-color .15s;
}
.field textarea:focus, .field input[type=text]:focus { border-color: var(--accent); }
.field input[type=range] {
  width: 100%;
  height: 4px;
  accent-color: var(--accent);
  cursor: pointer;
}

.switch-field {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
}
.switch-field label {
  margin: 0; flex: 1;
  color: var(--text); font-size: 14px; font-weight: 400;
  cursor: pointer;
}
.switch-field input[type=checkbox] {
  width: 40px; height: 22px;
  appearance: none;
  -webkit-appearance: none;
  background: var(--panel-2);
  border-radius: 11px;
  position: relative;
  cursor: pointer;
  transition: background .15s;
  flex-shrink: 0;
}
.switch-field input[type=checkbox]:checked { background: var(--accent); }
.switch-field input[type=checkbox]::before {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  transition: transform .15s;
}
.switch-field input[type=checkbox]:checked::before { transform: translateX(18px); }

.secondary-btn {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  margin-top: 8px;
  transition: background .12s;
}
.secondary-btn:hover { background: #4e4e4e; }

.danger-btn {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  width: 100%;
  transition: background .12s;
}
.danger-btn:hover { background: rgba(239, 65, 70, 0.1); }

/* ============ СКРОЛЛБАРЫ ============ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #444; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* ============ ТОСТ ============ */
.toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translateX(-50%);
  background: #2a2a2a;
  color: #fff;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 13px;
  z-index: 200;
  box-shadow: var(--shadow);
  animation: toastIn .2s ease-out;
}
.toast.error { border-color: var(--danger); color: #ff9ea0; }
@keyframes toastIn { from { opacity: 0; transform: translate(-50%, 10px); } to { opacity: 1; transform: translate(-50%, 0); } }

/* ============ АДАПТИВ ============ */
@media (max-width: 768px) {
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0;
    z-index: 50;
    margin-left: -260px;
  }
  .sidebar.open {
    margin-left: 0;
    box-shadow: 8px 0 30px rgba(0,0,0,0.5);
  }
  .msg, .composer { padding-left: 14px; padding-right: 14px; }
  .welcome { margin-top: 40px; }
  .welcome h1 { font-size: 1.8rem; }
}

/* ============ АВТОРИЗАЦИЯ ============ */
.login-screen {
    position: fixed;
    inset: 0;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.login-screen.hidden { display: none; }

.login-box {
    width: 100%;
    max-width: 380px;
    padding: 32px 28px;
    background: var(--panel);
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    text-align: center;
}
.login-box h1 {
    font-size: 1.8rem;
    margin-bottom: 8px;
    font-weight: 600;
    background: linear-gradient(135deg, #fff 0%, #b4b4b4 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.login-box p {
    color: var(--text-dim);
    font-size: 14px;
    margin-bottom: 24px;
}
.login-box input {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    color: var(--text);
    font-size: 15px;
    margin-bottom: 12px;
    outline: none;
    transition: border-color .2s;
}
.login-box input:focus {
    border-color: var(--accent);
}
.login-submit {
    width: 100%;
    background: var(--accent);
    color: #fff;
    border: 0;
    padding: 12px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s;
}
.login-submit:hover {
    background: var(--accent-hov);
}
.login-error {
    color: var(--danger);
    font-size: 13px;
    margin-top: 12px;
    min-height: 18px;
}