@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap");

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border-glass: rgba(255, 255, 255, 0.08);
  --accent-primary: #7c3aed;
  --accent-secondary: #06b6d4;
  --accent-glow: rgba(124, 58, 237, 0.4);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --msg-user-bg: linear-gradient(135deg, #7c3aed, #4f46e5);
  --msg-ai-bg: rgba(255, 255, 255, 0.05);
  --sidebar-width: 280px;
  --shadow-lg: 0 24px 80px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 20px var(--accent-glow);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --transition: 180ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scrollbar-color: rgba(124, 58, 237, 0.8) transparent;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 20%, rgba(124, 58, 237, 0.24), transparent 24%),
    radial-gradient(circle at 80% 10%, rgba(6, 182, 212, 0.18), transparent 25%),
    radial-gradient(circle at 50% 90%, rgba(79, 70, 229, 0.18), transparent 28%),
    linear-gradient(135deg, #06070a 0%, #0d0d14 40%, #090c12 100%);
  color: var(--text-primary);
  font-family: "Inter", sans-serif;
  overflow: hidden;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

img,
svg {
  display: block;
}

code,
pre {
  font-family: "JetBrains Mono", monospace;
}

a {
  color: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-shell,
.screen {
  min-height: 100vh;
}

.screen[hidden] {
  display: none;
}

.login-screen {
  position: relative;
  display: grid;
  place-items: center;
  padding: 24px;
  overflow: hidden;
}

.login-mesh {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.mesh-orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(24px);
  opacity: 0.9;
  animation: floatOrb 12s ease-in-out infinite;
}

.orb-1 {
  top: 10%;
  left: 8%;
  width: 28rem;
  height: 28rem;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.45), transparent 70%);
}

.orb-2 {
  right: 10%;
  bottom: 8%;
  width: 24rem;
  height: 24rem;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.38), transparent 68%);
  animation-delay: -5s;
}

.orb-3 {
  left: 42%;
  top: 55%;
  width: 18rem;
  height: 18rem;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.28), transparent 68%);
  animation-delay: -2s;
}

.mesh-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black, transparent 80%);
}

.login-card {
  position: relative;
  z-index: 1;
  width: min(100%, 440px);
  padding: 36px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 32px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
    rgba(10, 10, 15, 0.76);
  backdrop-filter: blur(28px);
  box-shadow: var(--shadow-lg);
}

.login-card.shake {
  animation: shake 0.42s ease;
}

.login-logo {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.22), rgba(6, 182, 212, 0.14));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12), var(--shadow-glow);
}

.login-logo svg {
  width: 38px;
  height: 38px;
}

.login-copy h1 {
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.05em;
}

.login-copy p {
  margin: 6px 0 28px;
  color: var(--text-secondary);
}

.login-form {
  display: grid;
  gap: 16px;
}

.password-shell {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px;
  border: 1px solid var(--border-glass);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
}

.password-shell:focus-within {
  border-color: rgba(124, 58, 237, 0.55);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.12);
}

.password-input {
  width: 100%;
  padding: 12px 14px;
  border: 0;
  outline: none;
  color: var(--text-primary);
  background: transparent;
}

.password-input::placeholder,
#message-input::placeholder {
  color: rgba(148, 163, 184, 0.7);
}

.primary-btn,
.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 16px;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition),
    background var(--transition),
    opacity var(--transition);
}

.primary-btn {
  padding: 14px 18px;
  color: white;
  background: linear-gradient(135deg, #7c3aed, #4f46e5 55%, #06b6d4);
  box-shadow: 0 10px 30px rgba(79, 70, 229, 0.35);
}

.primary-btn:hover:not(:disabled),
.send-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 0 20px var(--accent-glow);
}

.ghost-btn {
  padding: 12px 14px;
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.ghost-btn:hover:not(:disabled) {
  border-color: rgba(124, 58, 237, 0.35);
  background: rgba(255, 255, 255, 0.06);
}

.ghost-btn.small {
  min-width: 94px;
}

.primary-btn.compact {
  padding: 12px 14px;
}

.primary-btn:disabled,
.ghost-btn:disabled,
.send-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.login-error {
  min-height: 20px;
  margin: 0;
  color: #fda4af;
  font-size: 0.95rem;
}

.app-screen {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
}

.sidebar {
  position: relative;
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 100vh;
  padding: 24px 18px;
  border-right: 1px solid var(--border-glass);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    rgba(17, 17, 24, 0.7);
  backdrop-filter: blur(20px);
}

.sidebar-header,
.sidebar-footer,
.brand-block,
.user-card,
.chat-header,
.chat-header-left,
.chat-header-actions,
.input-toolbar {
  display: flex;
  align-items: center;
}

.sidebar-header,
.sidebar-footer {
  justify-content: space-between;
  gap: 14px;
}

.brand-block {
  gap: 12px;
}

.brand-mark,
.avatar-circle,
.message-avatar {
  display: grid;
  place-items: center;
  border-radius: 999px;
  color: white;
  font-weight: 700;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, #7c3aed, #06b6d4);
}

.brand-mark {
  width: 42px;
  height: 42px;
  font-size: 1.1rem;
}

.brand-label {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}

.brand-subtitle,
.user-role {
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.model-panel,
.input-shell,
.chat-item,
.welcome-screen,
.toast,
.message-bubble {
  border: 1px solid var(--border-glass);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
}

.model-panel {
  padding: 14px;
  border-radius: var(--radius-lg);
}

.model-panel label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.select-shell,
.header-model-picker {
  position: relative;
}

.select-shell::after,
.header-model-picker::after {
  content: "⌄";
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-54%);
  pointer-events: none;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

select {
  width: 100%;
  appearance: none;
  padding: 12px 40px 12px 14px;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  background: rgba(12, 14, 20, 0.9);
  outline: none;
}

select:focus {
  border-color: rgba(124, 58, 237, 0.45);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.12);
}

.chats-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
  padding-right: 4px;
  overflow-y: auto;
}

.chat-item {
  position: relative;
  padding: 14px;
  border-radius: 18px;
  transition:
    transform var(--transition),
    border-color var(--transition),
    background var(--transition);
}

.chat-item:hover {
  transform: translateY(-1px);
  border-color: rgba(124, 58, 237, 0.22);
  background: rgba(255, 255, 255, 0.07);
}

.chat-item.active {
  border-color: rgba(124, 58, 237, 0.45);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), 0 0 20px rgba(124, 58, 237, 0.18);
}

.chat-item-button {
  width: 100%;
  padding: 0;
  border: 0;
  color: inherit;
  text-align: left;
  background: transparent;
}

.chat-item-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.chat-item-title {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 600;
}

.chat-item-date {
  color: var(--text-muted);
  font-size: 0.76rem;
  white-space: nowrap;
}

.chat-item-preview {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.45;
}

.chat-delete-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  color: #fca5a5;
  opacity: 0;
  background: rgba(239, 68, 68, 0.14);
  transition: opacity var(--transition), background var(--transition);
}

.chat-item:hover .chat-delete-btn,
.chat-item.active .chat-delete-btn {
  opacity: 1;
}

.chat-delete-btn:hover {
  background: rgba(239, 68, 68, 0.2);
}

.user-card {
  gap: 12px;
}

.avatar-circle {
  width: 42px;
  height: 42px;
}

.user-meta {
  display: grid;
  gap: 3px;
}

.user-name {
  font-weight: 600;
}

.main-area {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-width: 0;
  min-height: 100vh;
}

.chat-header {
  justify-content: space-between;
  gap: 18px;
  padding: 22px 26px 18px;
  border-bottom: 1px solid var(--border-glass);
  background: linear-gradient(180deg, rgba(10, 10, 15, 0.72), rgba(10, 10, 15, 0.4));
  backdrop-filter: blur(18px);
}

.chat-header-left {
  gap: 16px;
  min-width: 0;
}

.chat-heading {
  min-width: 0;
}

.chat-heading h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.chat-heading p {
  margin: 6px 0 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.chat-header-actions {
  gap: 12px;
}

.header-model-picker select {
  min-width: 220px;
  padding-right: 42px;
}

.model-badge {
  padding: 10px 14px;
  border: 1px solid rgba(124, 58, 237, 0.26);
  border-radius: 999px;
  color: #ddd6fe;
  font-size: 0.88rem;
  white-space: nowrap;
  background: rgba(124, 58, 237, 0.12);
}

.icon-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 44px;
  height: 44px;
  padding: 0;
}

.icon-btn span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.messages-area {
  position: relative;
  min-height: 0;
  padding: 24px 26px;
  overflow-y: auto;
}

.messages-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.welcome-screen {
  max-width: 720px;
  margin: 10vh auto 0;
  padding: 28px;
  border-radius: 26px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.welcome-screen.hidden {
  display: none;
}

.welcome-logo {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
  border-radius: 20px;
  color: white;
  font-size: 1.75rem;
  background: linear-gradient(135deg, #7c3aed, #06b6d4);
  box-shadow: var(--shadow-glow);
}

.welcome-screen h3 {
  margin: 0 0 8px;
  font-size: 1.55rem;
}

.welcome-screen p {
  margin: 0 auto;
  max-width: 56ch;
  color: var(--text-secondary);
  line-height: 1.7;
}

.welcome-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
}

.suggestion-chip {
  padding: 11px 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  transition:
    transform var(--transition),
    border-color var(--transition);
}

.suggestion-chip:hover {
  transform: translateY(-1px);
  border-color: rgba(124, 58, 237, 0.35);
}

.message-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  animation: fadeInUp 0.3s ease;
}

.message-row.user {
  justify-content: flex-end;
}

.message-row.user .message-content {
  align-items: flex-end;
}

.message-row.assistant .message-content {
  align-items: flex-start;
}

.message-row.user .message-avatar {
  order: 2;
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
}

.message-row.assistant .message-avatar {
  background: linear-gradient(135deg, #06b6d4, #7c3aed);
}

.message-avatar {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  font-size: 0.82rem;
}

.message-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: min(78%, 820px);
}

.message-bubble {
  padding: 14px 16px;
  border-radius: 20px;
  line-height: 1.65;
  overflow: hidden;
}

.message-row.user .message-bubble {
  border-top-right-radius: 8px;
  background: var(--msg-user-bg);
}

.message-row.assistant .message-bubble {
  border-top-left-radius: 8px;
  background: var(--msg-ai-bg);
}

.message-bubble p:first-child {
  margin-top: 0;
}

.message-bubble p:last-child {
  margin-bottom: 0;
}

.message-bubble ul,
.message-bubble ol {
  padding-left: 20px;
}

.message-bubble blockquote {
  margin: 16px 0;
  padding-left: 14px;
  color: var(--text-secondary);
  border-left: 3px solid rgba(124, 58, 237, 0.45);
}

.message-bubble pre {
  position: relative;
  margin: 16px 0 0;
  padding: 18px;
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background: rgba(3, 7, 18, 0.9);
}

.message-bubble code:not(pre code) {
  padding: 0.16em 0.4em;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.copy-code-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

.copy-code-btn:hover {
  background: rgba(255, 255, 255, 0.14);
}

.message-meta {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.typing-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  animation: blinkDot 1s infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.3s;
}

.input-area {
  padding: 0 26px 26px;
}

.input-shell {
  padding: 14px;
  border-radius: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

#message-input {
  width: 100%;
  resize: none;
  padding: 6px 4px 0;
  border: 0;
  outline: none;
  color: var(--text-primary);
  background: transparent;
  line-height: 1.65;
}

.input-shell:focus-within {
  border-color: rgba(124, 58, 237, 0.5);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.11), 0 20px 50px rgba(0, 0, 0, 0.28);
}

.input-toolbar {
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
}

.char-counter {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.send-btn {
  padding: 12px 16px;
}

.send-btn svg {
  width: 18px;
  height: 18px;
}

.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 80;
  display: grid;
  gap: 12px;
  width: min(92vw, 360px);
}

.toast {
  padding: 14px 16px;
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.25s ease;
}

.toast.error {
  border-color: rgba(239, 68, 68, 0.25);
  background: rgba(46, 11, 17, 0.88);
}

.toast.success {
  border-color: rgba(34, 197, 94, 0.2);
  background: rgba(7, 33, 16, 0.86);
}

.sidebar-backdrop {
  display: none;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(124, 58, 237, 0.92), rgba(99, 102, 241, 0.92));
  background-clip: padding-box;
}

@keyframes floatOrb {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(0, -22px, 0) scale(1.05);
  }
}

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

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-8px);
  }
  40% {
    transform: translateX(8px);
  }
  60% {
    transform: translateX(-5px);
  }
  80% {
    transform: translateX(5px);
  }
}

@keyframes blinkDot {
  0%,
  80%,
  100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  40% {
    transform: translateY(-2px);
    opacity: 1;
  }
}

@media (max-width: 960px) {
  .app-screen {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(88vw, 320px);
    transform: translateX(-105%);
    transition: transform 220ms ease;
  }

  .sidebar.is-open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 15;
    display: block;
    opacity: 0;
    pointer-events: none;
    background: rgba(3, 5, 10, 0.6);
    transition: opacity 220ms ease;
  }

  .sidebar-backdrop.is-visible {
    opacity: 1;
    pointer-events: auto;
  }

  .icon-btn {
    display: inline-flex;
  }

  .chat-header,
  .messages-area,
  .input-area {
    padding-left: 18px;
    padding-right: 18px;
  }

  .chat-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .chat-header-left,
  .chat-header-actions {
    width: 100%;
  }

  .chat-header-actions {
    justify-content: space-between;
    flex-wrap: wrap;
  }

  .header-model-picker {
    flex: 1;
    min-width: 0;
  }

  .header-model-picker select {
    min-width: 0;
    width: 100%;
  }

  .message-content {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  body {
    overflow: auto;
  }

  .login-screen {
    padding: 16px;
  }

  .login-card {
    padding: 26px 20px;
    border-radius: 24px;
  }

  .chat-header {
    padding-top: 18px;
  }

  .welcome-screen {
    margin-top: 8vh;
    padding: 22px 18px;
  }

  .welcome-pills {
    justify-content: stretch;
  }

  .suggestion-chip {
    flex: 1 1 100%;
  }

  .message-row {
    gap: 10px;
  }

  .message-avatar {
    width: 34px;
    height: 34px;
  }

  .message-bubble {
    padding: 12px 14px;
  }

  .input-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .send-btn {
    width: 100%;
  }

  .model-badge {
    width: 100%;
    text-align: center;
  }
}