@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,500;0,600;1,400&family=Outfit:wght@300;400;500;600;700;800&display=swap");

/* ─────────────────────────────────────────────────────────────
   RESET & TOKENS
───────────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Backgrounds */
  --bg-primary: #07070f;
  --bg-secondary: #0d0d1a;
  --bg-tertiary: #131326;
  --bg-hover: #181830;

  /* Accent */
  --accent: #7c3aed;
  --accent-bright: #a855f7;
  --accent-dim: #5b21b6;
  --accent-glow: rgba(124, 58, 237, 0.22);
  --accent-subtle: rgba(124, 58, 237, 0.08);
  --accent-border: rgba(124, 58, 237, 0.22);

  /* Text */
  --text-primary: #eeeef8;
  --text-secondary: #8888aa;
  --text-muted: #444460;
  --text-accent: #c084fc;

  /* Borders */
  --border: rgba(255, 255, 255, 0.055);
  --border-strong: rgba(255, 255, 255, 0.1);
  --border-accent: rgba(124, 58, 237, 0.3);

  /* Status */
  --success: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;

  /* Layout */
  --sidebar-width: 280px;
  --topbar-height: 58px;

  /* Typography */
  --font-display: "Outfit", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  /* Motion */
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.15);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

html,
body,
#root {
  height: 100%;
  width: 100%;
}

body {
  font-family: var(--font-display);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

/* ─────────────────────────────────────────────────────────────
   SCROLLBAR
───────────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 3px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(124, 58, 237, 0.25);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* ─────────────────────────────────────────────────────────────
   KEYFRAMES
───────────────────────────────────────────────────────────── */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.45;
  }
}
@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}
@keyframes dotBounce {
  0%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-5px);
  }
}

.fade-in {
  animation: fadeIn 0.3s ease forwards;
}

/* ─────────────────────────────────────────────────────────────
   LAYOUT ROOT
───────────────────────────────────────────────────────────── */
.layout-root {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  background: var(--bg-primary);
  position: relative;
}

/* Subtle grid texture */
.layout-root::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(124, 58, 237, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 58, 237, 0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
  z-index: 1;
  transition: margin-left 0.28s var(--ease-smooth);
}

/* ─────────────────────────────────────────────────────────────
   SIDEBAR
───────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  height: 100%;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  position: relative;
  z-index: 100;
  transition:
    width 0.28s var(--ease-smooth),
    opacity 0.2s;
}

.sidebar--closed {
  width: 0;
  opacity: 0;
  pointer-events: none;
}

.sidebar__overlay {
  display: none;
}

@media (min-width: 901px) {
  .sidebar {
    position: relative !important;
    transform: none !important;
  }
  .sidebar--closed {
    width: 0;
    opacity: 0;
  }
}

@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    transform: translateX(0);
    transition: transform 0.28s var(--ease-smooth);
  }
  .sidebar--closed {
    width: var(--sidebar-width);
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-100%);
  }
  .sidebar__overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
    z-index: 99;
    animation: fadeIn 0.2s ease;
  }
}

.sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0.9rem 0.75rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar__logo {
  display: flex;
  align-items: center;
  gap: 9px;
  overflow: hidden;
}

.sidebar__logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 3px;
}

.sidebar__logo-text {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.sidebar__new-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  border-radius: 7px;
  color: var(--text-accent);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s var(--ease-smooth);
}
.sidebar__new-btn:hover {
  background: rgba(124, 58, 237, 0.18);
  border-color: var(--accent-bright);
  transform: rotate(90deg) scale(1.08);
}

.sidebar__list {
  flex: 1;
  overflow-y: auto;
  padding: 0.4rem 0.4rem;
}

.sidebar__group-label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  padding: 0.7rem 0.65rem 0.3rem;
}

.sidebar__item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.14s var(--ease-smooth);
  position: relative;
  margin-bottom: 1px;
  border: 1px solid transparent;
}
.sidebar__item:hover {
  background: var(--bg-hover);
}
.sidebar__item--active {
  background: var(--accent-subtle);
  border-color: var(--accent-border);
}
.sidebar__item--active .sidebar__item-title {
  color: var(--text-accent);
}
.sidebar__item-icon {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color 0.14s;
}
.sidebar__item--active .sidebar__item-icon {
  color: var(--accent-bright);
}

.sidebar__item-title {
  flex: 1;
  font-size: 0.82rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.3;
}

.sidebar__edit-input {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--accent);
  border-radius: 5px;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 0.82rem;
  padding: 2px 6px;
  outline: none;
}

.sidebar__item-actions {
  display: flex;
  gap: 3px;
  flex-shrink: 0;
}

.sidebar__action-btn {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  border-radius: 5px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.14s;
}
.sidebar__action-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.sidebar__action-btn--delete:hover {
  background: rgba(248, 113, 113, 0.1);
  color: var(--danger);
}

.sidebar__empty {
  padding: 2rem 1rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.8;
}
.sidebar__loading {
  padding: 1.5rem 1rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.sidebar__footer {
  border-top: 1px solid var(--border);
  padding: 0.65rem;
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex-shrink: 0;
}

.sidebar__footer-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  border-radius: 8px;
  color: var(--text-accent);
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: all 0.2s var(--ease-smooth);
}
.sidebar__footer-btn:hover {
  background: rgba(124, 58, 237, 0.15);
  border-color: var(--accent-bright);
  transform: translateY(-1px);
}

.sidebar__user-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 7px;
  border-radius: 8px;
}

.sidebar__user-avatar {
  width: 26px;
  height: 26px;
  background: linear-gradient(135deg, var(--accent-dim), var(--accent-bright));
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.sidebar__user-name {
  flex: 1;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar__logout-btn {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.14s;
  flex-shrink: 0;
}
.sidebar__logout-btn:hover {
  color: var(--danger);
  background: rgba(248, 113, 113, 0.08);
}

/* ─────────────────────────────────────────────────────────────
   TOPBAR
───────────────────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  height: var(--topbar-height);
  background: rgba(7, 7, 15, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 50;
  flex-shrink: 0;
}

.topbar__menu-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 7px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s;
}
.topbar__menu-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.topbar__title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar__new-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  border-radius: 20px;
  color: var(--text-accent);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
}
.topbar__new-btn:hover {
  background: rgba(124, 58, 237, 0.15);
  border-color: var(--accent-bright);
  color: var(--accent-bright);
  transform: translateY(-1px);
}

/* ─────────────────────────────────────────────────────────────
   MESSAGES AREA
───────────────────────────────────────────────────────────── */
.messages-area {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

.messages-list {
  max-width: 780px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* ─────────────────────────────────────────────────────────────
   MESSAGE BUBBLES
───────────────────────────────────────────────────────────── */
.message-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  animation: fadeUp 0.26s var(--ease-spring) forwards;
  padding: 3px 0;
}
.message-row--user {
  flex-direction: row-reverse;
}
.message-row--new {
  animation: fadeUp 0.3s var(--ease-spring) forwards;
}

.msg-avatar {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 4px;
}
.msg-avatar--ai {
  background: linear-gradient(135deg, var(--accent-dim), var(--accent-bright));
  color: white;
  box-shadow: 0 0 10px var(--accent-glow);
}
.msg-avatar--user {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
}

.msg-content-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: min(76%, 640px);
}
.message-row--user .msg-content-wrap {
  align-items: flex-end;
}

.msg-role-name {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 2px;
}

.msg-bubble {
  padding: 0.7rem 1rem;
  border-radius: 16px;
  line-height: 1.7;
  font-size: 0.9rem;
  position: relative;
}
.msg-bubble--ai {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  color: var(--text-primary);
}
.msg-bubble--user {
  background: linear-gradient(135deg, var(--accent-dim), var(--accent));
  border-bottom-right-radius: 4px;
  color: white;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.28);
}
.msg-bubble--user p {
  color: white;
  margin: 0;
}

.msg-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 2px;
}
.msg-meta--user {
  flex-direction: row-reverse;
}

.msg-timestamp {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.msg-copy-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 7px;
  background: none;
  border: 1px solid transparent;
  border-radius: 5px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  cursor: pointer;
  transition: all 0.14s;
}
.msg-copy-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-strong);
  color: var(--text-secondary);
}

/* Sources citation */
.msg-sources {
  margin-top: 0.75rem;
  padding: 0.45rem 0.75rem;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  border-radius: 7px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ─────────────────────────────────────────────────────────────
   TYPING INDICATOR
───────────────────────────────────────────────────────────── */
.typing-indicator {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 3px 0;
  animation: fadeUp 0.2s ease forwards;
}
.typing-bubble {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0.65rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  border-bottom-left-radius: 4px;
}
.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-bright);
  animation: dotBounce 1.2s ease infinite;
  opacity: 0.7;
}

/* ─────────────────────────────────────────────────────────────
   MARKDOWN CONTENT
───────────────────────────────────────────────────────────── */
.message-content {
  line-height: 1.75;
  font-size: 0.9rem;
}
.message-content p {
  margin-bottom: 0.65rem;
}
.message-content p:last-child {
  margin-bottom: 0;
}
.message-content h1,
.message-content h2,
.message-content h3 {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 1rem 0 0.4rem;
  color: var(--text-primary);
  line-height: 1.3;
}
.message-content h1 {
  font-size: 1.15rem;
}
.message-content h2 {
  font-size: 1.05rem;
}
.message-content h3 {
  font-size: 0.95rem;
  color: var(--text-accent);
}
.message-content code {
  font-family: var(--font-mono);
  background: rgba(124, 58, 237, 0.12);
  border: 1px solid var(--accent-border);
  padding: 0.12em 0.42em;
  border-radius: 5px;
  font-size: 0.82em;
  color: var(--text-accent);
}
.message-content pre {
  background: #060611;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: 0.75rem 0;
}
.message-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 0.83rem;
}
.message-content ul,
.message-content ol {
  padding-left: 1.4rem;
  margin-bottom: 0.65rem;
}
.message-content li {
  margin-bottom: 0.2rem;
}
.message-content blockquote {
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
  color: var(--text-secondary);
  font-style: italic;
  margin: 0.75rem 0;
}
.message-content a {
  color: var(--text-accent);
  text-decoration: underline;
}
.message-content strong {
  color: var(--text-primary);
  font-weight: 700;
}
.message-content em {
  color: var(--text-secondary);
}

/* ─────────────────────────────────────────────────────────────
   WELCOME SCREEN
───────────────────────────────────────────────────────────── */
.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  padding: 3rem 2rem;
  text-align: center;
  animation: fadeUp 0.45s var(--ease-spring) forwards;
}

.welcome__logo {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  padding: 7px;
  box-shadow: 0 0 28px var(--accent-glow);
}
.welcome__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.welcome__title {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(
    135deg,
    var(--text-primary) 35%,
    var(--text-accent)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.4rem;
}

.welcome__subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 360px;
  line-height: 1.65;
  margin-bottom: 2.5rem;
  font-family: var(--font-mono);
}

.suggestions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  max-width: 620px;
  width: 100%;
}

.suggestion-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
  padding: 1rem 1.1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s var(--ease-smooth);
  position: relative;
  overflow: hidden;
}
.suggestion-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-subtle), transparent);
  opacity: 0;
  transition: opacity 0.2s;
}
.suggestion-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}
.suggestion-card:hover::after {
  opacity: 1;
}

.suggestion-card__icon {
  font-size: 1.1rem;
  position: relative;
  z-index: 1;
}
.suggestion-card__label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-bright);
  position: relative;
  z-index: 1;
}
.suggestion-card__text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.45;
  position: relative;
  z-index: 1;
}

/* ─────────────────────────────────────────────────────────────
   INPUT AREA
───────────────────────────────────────────────────────────── */
.input-area {
  padding: 0.75rem 1.25rem 1rem;
  flex-shrink: 0;
  background: linear-gradient(to top, var(--bg-primary) 75%, transparent);
}

.input-wrapper {
  max-width: 780px;
  margin: 0 auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-strong);
  border-radius: 22px;
  overflow: hidden;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}
.input-wrapper:focus-within {
  border-color: var(--accent-border);
  box-shadow:
    0 0 0 3px rgba(124, 58, 237, 0.07),
    0 4px 20px rgba(0, 0, 0, 0.25);
}

.input-textarea {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 0.92rem;
  line-height: 1.6;
  padding: 0.9rem 1.15rem 0.45rem;
  resize: none;
  max-height: 200px;
  overflow-y: auto;
}
.input-textarea::placeholder {
  color: var(--text-muted);
}
.input-textarea:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.input-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 0.75rem 0.6rem;
}
.input-footer__left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.input-hint {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}
.input-hint--thinking {
  color: var(--accent-bright);
  animation: pulse 1.5s ease infinite;
}

.send-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  color: white;
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
  flex-shrink: 0;
}
.send-btn:hover:not(:disabled) {
  background: var(--accent-bright);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--accent-glow);
}
.send-btn:disabled {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  cursor: not-allowed;
}

.input-disclaimer {
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
  font-family: var(--font-mono);
}

/* ─────────────────────────────────────────────────────────────
   COMPARISON MODE
───────────────────────────────────────────────────────────── */
.msg-bubble--comparison {
  max-width: 95% !important;
  background: transparent !important;
  box-shadow: none !important;
  padding: 0 !important;
  border: none !important;
}
.comparison-container {
  display: flex;
  gap: 1.25rem;
  width: 100%;
}
.comparison-pane {
  flex: 1;
  min-width: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.15rem 1.25rem;
}
.comparison-pane--powerful {
  border-color: var(--accent-border);
  background: rgba(124, 58, 237, 0.04);
  box-shadow: 0 4px 20px -8px var(--accent-glow);
}
.comparison-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 0.75rem;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.comparison-pane--powerful .comparison-label {
  background: var(--accent-subtle);
  color: var(--text-accent);
  border-color: var(--accent-border);
}

.compare-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.compare-toggle:hover {
  border-color: var(--border-strong);
  background: var(--bg-hover);
}
.compare-toggle--active {
  background: var(--accent-subtle);
  border-color: var(--accent-border);
  color: var(--text-accent);
  box-shadow: 0 0 12px var(--accent-glow);
}
.compare-toggle__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: all 0.2s;
}
.compare-toggle--active .compare-toggle__dot {
  background: var(--accent-bright);
  box-shadow: 0 0 6px var(--accent-bright);
}

/* ─────────────────────────────────────────────────────────────
   AUTH PAGES
───────────────────────────────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: 2rem;
  position: relative;
}

/* bg decorations used in LoginPage / RegisterPage */
.auth-page__bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(124, 58, 237, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 58, 237, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  z-index: 0;
}
.auth-page__bg-glow {
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  pointer-events: none;
  background: radial-gradient(
    circle,
    rgba(124, 58, 237, 0.07) 0%,
    transparent 65%
  );
  z-index: 0;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 2.5rem 2rem;
  position: relative;
  z-index: 1;
  animation: fadeUp 0.4s var(--ease-spring) forwards;
}

.auth-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 0.4rem;
  gap: 10px;
}
.auth-logo__icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  box-shadow: 0 0 22px var(--accent-glow);
}
.auth-logo__name {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.auth-subtitle {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 1.75rem;
}

.auth-error {
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.25);
  color: #fca5a5;
  border-radius: 10px;
  padding: 0.65rem 1rem;
  font-size: 0.83rem;
  margin-bottom: 1rem;
  animation: slideDown 0.25s ease;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.auth-label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.auth-input {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  outline: none;
  width: 100%;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}
.auth-input:focus {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.07);
}
.auth-input::placeholder {
  color: var(--text-muted);
}

.auth-btn {
  width: 100%;
  padding: 0.85rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 0.25rem;
  transition: all 0.2s var(--ease-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.25);
}
.auth-btn:hover:not(:disabled) {
  background: var(--accent-bright);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
}
.auth-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.auth-switch {
  text-align: center;
  margin-top: 1.2rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.auth-link {
  color: var(--text-accent);
  text-decoration: none;
  font-weight: 500;
}
.auth-link:hover {
  text-decoration: underline;
}

/* ─────────────────────────────────────────────────────────────
   TRAINING PAGE
───────────────────────────────────────────────────────────── */
.training-scroll {
  flex: 1;
  min-height: 0;
  width: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

.training-container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 2.5rem 1.75rem 4rem;
  animation: fadeUp 0.4s var(--ease-spring) forwards;
}
.training-header {
  margin-bottom: 2.5rem;
  text-align: center;
}
.training-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: linear-gradient(
    to right,
    var(--text-primary),
    var(--text-accent)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
}
.training-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 540px;
  margin: 0 auto;
}

.training-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.training-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color 0.2s;
}
.training-card:focus-within {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.05);
}

.training-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-accent);
}

.training-input,
.training-textarea {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  padding: 0.85rem 1rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  transition: border-color 0.2s;
  width: 100%;
}
.training-input:focus,
.training-textarea:focus {
  outline: none;
  border-color: var(--accent-border);
}
.training-textarea {
  min-height: 180px;
  resize: vertical;
  line-height: 1.6;
}

.save-button {
  width: 100%;
  padding: 1.1rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  font-family: var(--font-display);
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.25);
}
.save-button:hover:not(:disabled) {
  background: var(--accent-bright);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.4);
}
.save-button:active:not(:disabled) {
  transform: translateY(0);
}
.save-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--bg-tertiary);
  box-shadow: none;
}

.kb-section {
  margin-top: 3.5rem;
  animation: fadeIn 0.8s ease;
}
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
}
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.kb-upload-zone {
  margin-bottom: 2.5rem;
}
.kb-upload-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3.5rem 2rem;
  border: 2px dashed var(--border);
  border-radius: 22px;
  background: var(--accent-subtle);
  cursor: pointer;
  transition: all 0.3s var(--ease-smooth);
}
.kb-upload-label:hover {
  border-color: var(--accent-border);
  background: rgba(124, 58, 237, 0.06);
  transform: scale(1.01);
}
.kb-upload-label--disabled {
  cursor: wait;
  opacity: 0.78;
  pointer-events: none;
}
.kb-upload-icon {
  font-size: 2.75rem;
  margin-bottom: 1.25rem;
}
.kb-upload-progress {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.kb-upload-progress__bar {
  height: 6px;
  background: var(--bg-primary);
  border-radius: 999px;
  overflow: hidden;
}
.kb-upload-progress__fill {
  height: 100%;
  background: var(--accent);
  border-radius: inherit;
  transition: width 0.25s var(--ease-smooth);
}
.kb-upload-progress__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 0.65rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.knowledge-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 0.75rem;
}
.knowledge-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.1rem 1.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.15s;
}
.knowledge-item:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-strong);
}
.knowledge-item__info {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.knowledge-item__icon {
  font-size: 1.65rem;
}
.knowledge-item__name {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-primary);
  display: block;
  max-width: 170px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.knowledge-item__meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.knowledge-item__delete {
  padding: 7px;
  background: transparent;
  border: 1px solid rgba(248, 113, 113, 0.2);
  color: var(--danger);
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.15s;
}
.knowledge-item__delete:hover {
  background: rgba(248, 113, 113, 0.1);
  border-color: var(--danger);
}

/* ─────────────────────────────────────────────────────────────
   ALERTS & LOADERS
───────────────────────────────────────────────────────────── */
.alert {
  padding: 1rem 1.25rem;
  border-radius: 14px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideDown 0.35s var(--ease-smooth);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}
.alert--error {
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.25);
  color: #fca5a5;
}
.alert--success {
  background: rgba(52, 211, 153, 0.08);
  border: 1px solid rgba(52, 211, 153, 0.25);
  color: #6ee7b7;
}

@keyframes slideDown {
  from {
    transform: translateY(-12px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  gap: 1.25rem;
  color: var(--text-secondary);
}
.spinner {
  width: 44px;
  height: 44px;
  border: 2px solid var(--border);
  border-top-color: var(--accent-bright);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
.spinner-small {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ─────────────────────────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .comparison-container {
    flex-direction: column;
  }
  .training-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .suggestions {
    grid-template-columns: 1fr;
    max-width: 100%;
  }
  .welcome__title {
    font-size: 1.35rem;
  }
  .messages-list {
    padding: 1rem 0.75rem;
  }
  .input-area {
    padding: 0.5rem 0.75rem 0.75rem;
  }
  .training-container {
    padding: 1.5rem 1rem;
  }
}