/* ============================================================
   Saint AI Platform — Premium Dark Theme
   ============================================================ */

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

:root {
  --bg-deep:       #0a0a0a;
  --bg-primary:    #111111;
  --bg-base:       #171717;
  --bg-elevated:   #1e1e1e;
  --bg-surface:    #252525;
  --bg-hover:      #2a2a2a;
  --bg-active:     #333333;

  --text-primary:  #f0f0f0;
  --text-secondary:#8b8b8b;
  --text-tertiary: #555555;
  --text-inverse:  #0a0a0a;

  --accent:        #8b5cf6;
  --accent-hover:  #7c3aed;
  --accent-glow:   rgba(139,92,246,0.15);
  --accent-subtle: rgba(139,92,246,0.08);

  --success:       #22c55e;
  --success-bg:    rgba(34,197,94,0.1);
  --warning:       #f59e0b;
  --warning-bg:    rgba(245,158,11,0.1);
  --danger:        #ef4444;
  --danger-bg:     rgba(239,68,68,0.1);
  --info:          #3b82f6;
  --info-bg:       rgba(59,130,246,0.1);

  --border:        rgba(255,255,255,0.06);
  --border-strong: rgba(255,255,255,0.1);
  --border-accent: rgba(139,92,246,0.3);

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --sidebar-width: 280px;
  --navbar-height: 52px;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Fira Code', ui-monospace, monospace;

  --shadow-sm:  0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg:  0 8px 30px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px rgba(139,92,246,0.15);

  --transition-fast: 0.1s ease;
  --transition:      0.2s ease;
  --transition-slow:  0.3s ease;
}

/* ---------- reset ---------- */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

html { font-size: 15px; scroll-behavior: smooth; }

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

a { color: var(--accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-hover); }
p { color: var(--text-secondary); }

::selection { background: var(--accent); color: #fff; }

/* ---------- typography ---------- */
h1 { font-size: 1.75rem; font-weight: 700; letter-spacing: -0.03em; line-height: 1.2; color: var(--text-primary); }
h2 { font-size: 1.3rem; font-weight: 600; letter-spacing: -0.02em; line-height: 1.3; color: var(--text-primary); }
h3 { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em; color: var(--text-primary); }

/* ---------- navbar ---------- */
.navbar {
  height: var(--navbar-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.navbar .logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar .logo svg { width: 22px; height: 22px; }
.navbar .logo:hover { color: var(--text-primary); }

.nav-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-right .nav-link {
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-right .nav-link:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.nav-right .nav-link.active {
  background: var(--accent-subtle);
  color: var(--accent);
}

.user-menu {
  position: relative;
  margin-left: 8px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent), #a855f7);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color var(--transition-fast);
}

.user-avatar:hover { border-color: var(--accent); }

.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 220px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  display: none;
  z-index: 200;
}

.user-dropdown.open { display: block; animation: fadeDown 0.15s ease-out; }

.user-dropdown .dropdown-header {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.user-dropdown .dropdown-header .name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.user-dropdown .dropdown-header .email {
  font-size: 0.76rem;
  color: var(--text-tertiary);
  margin-top: 1px;
}

.user-dropdown a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--text-secondary);
  font-size: 0.84rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.user-dropdown a:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.user-dropdown a.danger { color: var(--danger); }
.user-dropdown a.danger:hover { background: var(--danger-bg); }

.user-dropdown a svg { width: 16px; height: 16px; opacity: 0.6; }

/* ---------- mobile hamburger ---------- */
.hamburger {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  margin-right: 8px;
}

.hamburger:hover { background: var(--bg-elevated); color: var(--text-primary); }
.hamburger svg { width: 20px; height: 20px; }

/* ---------- sidebar ---------- */
.sidebar {
  position: fixed;
  left: 0;
  top: var(--navbar-height);
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-primary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 50;
  transition: transform var(--transition-slow);
}

.sidebar-header {
  padding: 12px;
  flex-shrink: 0;
}

.new-chat-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px rgba(139,92,246,0.25);
}

.new-chat-btn:hover { background: var(--accent-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(139,92,246,0.35); }

.sidebar-search {
  padding: 0 12px 10px;
  flex-shrink: 0;
}

.sidebar-search input {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 7px 10px 7px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-family: var(--font);
  outline: none;
  transition: border-color var(--transition-fast);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='none' stroke='%23555' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='6' cy='6' r='4.5'/%3E%3Cline x1='9.5' y1='9.5' x2='13' y2='13'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 10px center;
}

.sidebar-search input::placeholder { color: var(--text-tertiary); }
.sidebar-search input:focus { border-color: var(--accent); }

.convo-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  padding: 2px 0;
}

.convo-section-label {
  padding: 8px 16px 4px;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
}

.convo-item {
  position: relative;
}

.convo-item a {
  display: block;
  padding: 8px 36px 8px 16px;
  color: var(--text-secondary);
  font-size: 0.84rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-radius: var(--radius-sm);
  margin: 1px 8px;
  transition: all var(--transition-fast);
}

.convo-item a:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.convo-item.active a {
  background: var(--accent-subtle);
  color: var(--accent);
  font-weight: 500;
}

.convo-item .convo-delete {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  display: none;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  border-radius: var(--radius-xs);
  font-size: 0.7rem;
}

.convo-item:hover .convo-delete { display: flex; }
.convo-item .convo-delete:hover { color: var(--danger); background: var(--danger-bg); }

.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* ---------- main content (chat layout) ---------- */
.layout-with-sidebar {
  display: flex;
  height: 100vh;
  padding-top: var(--navbar-height);
  overflow: hidden;
}

.layout-with-sidebar .main-area {
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex: 1;
  min-height: 0;
}

/* ---------- welcome screen ---------- */
.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 40px 20px 100px;
  text-align: center;
  animation: fadeIn 0.4s ease-out;
}

/* Reset text-align when welcome screen is replaced with chat content */
.welcome-screen .messages-container,
.welcome-screen .chat-input-bar {
  text-align: left;
}

.welcome-logo {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent), #a855f7, #ec4899);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: var(--shadow-glow);
}

.welcome-logo svg { width: 28px; height: 28px; color: #fff; }

.welcome-screen h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.welcome-screen p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 460px;
  line-height: 1.6;
}

.welcome-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 560px;
  justify-content: center;
  margin-top: 24px;
}

.welcome-suggestion {
  padding: 8px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.welcome-suggestion:hover {
  background: var(--bg-hover);
  border-color: var(--border-strong);
  color: var(--text-primary);
}

/* ---------- chat input (shared) ---------- */
.welcome-input-container {
  max-width: 680px;
  width: 100%;
  margin-top: 32px;
}

.chat-input-bar {
  background: var(--bg-base);
  border-top: 1px solid var(--border);
  padding: 14px 24px 20px;
  z-index: 30;
  text-align: left;
  flex-shrink: 0;
}

.chat-input-bar .chat-input-container {
  max-width: 720px;
  margin: 0 auto;
}

.chat-input-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

.chat-input-box:focus-within {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.chat-input-box textarea {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-primary);
  padding: 14px 18px 6px;
  font-size: 0.94rem;
  font-family: var(--font);
  line-height: 1.55;
  resize: none;
  outline: none;
  display: block;
  max-height: 200px;
}

.chat-input-box textarea::placeholder { color: var(--text-tertiary); }

.chat-input-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 8px 8px;
}

.chat-input-left {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ---------- model selector ---------- */
.model-selector {
  position: relative;
}

.model-selector select {
  appearance: none;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-family: var(--font);
  font-weight: 500;
  padding: 5px 26px 5px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%238b8b8b' fill='none' stroke-width='1.3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.model-selector select:hover { border-color: var(--border-strong); color: var(--text-primary); }
.model-selector select:focus { outline: none; border-color: var(--accent); }
.model-selector select option { background: var(--bg-elevated); color: var(--text-primary); padding: 8px; }

/* ---------- send button ---------- */
.send-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(139,92,246,0.3);
}

.send-btn:hover { background: var(--accent-hover); transform: scale(1.05); }
.send-btn:disabled { opacity: 0.3; cursor: not-allowed; transform: none; box-shadow: none; }
.send-btn svg { width: 16px; height: 16px; }

/* ---------- messages area ---------- */
.chat-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 0;
  min-height: 0;
  text-align: left;
}

.messages-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 24px 16px;
  text-align: left;
}

.message {
  padding: 20px 0;
  display: flex;
  gap: 14px;
  animation: msgFadeIn 0.25s ease-out;
  text-align: left;
}

.message + .message { border-top: 1px solid var(--border); }

.message-avatar {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.message.user .message-avatar {
  background: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border-strong);
}

.message.assistant .message-avatar {
  background: linear-gradient(135deg, var(--accent), #a855f7);
  color: #fff;
}

.message-body { flex: 1; min-width: 0; }

.message-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.message-role {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.message-time {
  font-size: 0.7rem;
  color: var(--text-tertiary);
}

.message-content {
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text-primary);
  word-wrap: break-word;
  overflow-wrap: break-word;
  text-align: left;
}

/* Markdown content styles */
.message-content p { color: var(--text-primary); margin-bottom: 10px; text-align: left; }
.message-content p:last-child { margin-bottom: 0; }
.message-content ul, .message-content ol { margin: 8px 0; padding-left: 24px; color: var(--text-primary); }
.message-content li { margin-bottom: 4px; }
.message-content strong { font-weight: 600; }
.message-content em { font-style: italic; }
.message-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 14px;
  margin: 10px 0;
  color: var(--text-secondary);
  background: var(--accent-subtle);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.message-content h1, .message-content h2, .message-content h3 {
  margin: 16px 0 8px;
}

.message-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }

/* Inline code */
.message-content code:not(pre code) {
  font-family: var(--mono);
  background: var(--bg-surface);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-size: 0.86em;
  color: #e879f9;
  border: 1px solid var(--border);
}

/* Code blocks */
.message-content pre {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin: 12px 0;
  overflow: hidden;
  text-align: left;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--text-tertiary);
  font-family: var(--mono);
}

.copy-btn {
  padding: 3px 8px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  color: var(--text-tertiary);
  font-size: 0.7rem;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover { background: var(--bg-hover); color: var(--text-primary); border-color: var(--border-strong); }
.copy-btn.copied { color: var(--success); border-color: var(--success); }

.message-content pre code {
  display: block;
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 0.84rem;
  line-height: 1.6;
  overflow-x: auto;
  color: var(--text-primary);
  background: transparent;
  border: none;
  text-align: left;
  white-space: pre;
}

/* Tables in markdown */
.message-content table {
  border-collapse: collapse;
  margin: 12px 0;
  width: 100%;
  font-size: 0.88rem;
}

.message-content th, .message-content td {
  padding: 8px 12px;
  text-align: left;
  border: 1px solid var(--border);
}

.message-content th {
  background: var(--bg-surface);
  font-weight: 600;
  color: var(--text-primary);
}

/* ---------- streaming cursor ---------- */
.streaming-cursor::after {
  content: '';
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: cursorBlink 1s step-end infinite;
}

/* ---------- typing indicator ---------- */
.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 4px 0;
}

.typing-indicator span {
  width: 6px;
  height: 6px;
  background: var(--text-tertiary);
  border-radius: 50%;
  animation: typingBounce 1.2s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.15s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.3s; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  font-size: 0.84rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  background: var(--bg-elevated);
  transition: all var(--transition-fast);
  line-height: 1.3;
  text-decoration: none;
}

.btn:hover { background: var(--bg-hover); text-decoration: none; color: var(--text-primary); }
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 2px 6px rgba(139,92,246,0.25);
}

.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.btn-sm { padding: 5px 12px; font-size: 0.78rem; }
.btn-xs { padding: 3px 8px; font-size: 0.72rem; }

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover { background: var(--bg-hover); color: var(--text-primary); }

.btn-danger { background: var(--danger-bg); border-color: rgba(239,68,68,0.2); color: var(--danger); }
.btn-danger:hover { background: rgba(239,68,68,0.18); }

.btn-success { background: var(--success-bg); border-color: rgba(34,197,94,0.2); color: var(--success); }

.btn-icon {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: var(--radius-sm);
}

.btn-icon svg { width: 16px; height: 16px; }

/* ---------- cards ---------- */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  transition: border-color var(--transition-fast);
}

.card:hover { border-color: var(--border-strong); }

.card + .card { margin-top: 12px; }

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.card-subtitle {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ---------- forms ---------- */
.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
}

.form-input {
  width: 100%;
  background: var(--bg-base);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font);
  transition: all var(--transition);
  line-height: 1.4;
}

.form-input::placeholder { color: var(--text-tertiary); }
.form-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
select.form-input { cursor: pointer; }

.form-hint {
  font-size: 0.76rem;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* ---------- tables ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  padding: 10px 14px;
  text-align: left;
  font-size: 0.86rem;
}

.data-table th {
  color: var(--text-tertiary);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 8px;
}

.data-table td {
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.data-table tbody tr { transition: background var(--transition-fast); }
.data-table tbody tr:hover { background: var(--bg-elevated); }
.data-table tbody tr:last-child td { border-bottom: none; }

/* ---------- badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.3;
}

.badge-healthy, .badge-success { background: var(--success-bg); color: var(--success); }
.badge-degraded, .badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-down, .badge-error { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-free { background: var(--success-bg); color: var(--success); }
.badge-pro { background: var(--accent-subtle); color: var(--accent); }

/* ---------- stat cards ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.stat-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: all var(--transition-fast);
}

.stat-card:hover { border-color: var(--border-strong); }

.stat-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.stat-icon.purple { background: var(--accent-subtle); color: var(--accent); }
.stat-icon.green { background: var(--success-bg); color: var(--success); }
.stat-icon.blue { background: var(--info-bg); color: var(--info); }
.stat-icon.orange { background: var(--warning-bg); color: var(--warning); }

.stat-icon svg { width: 18px; height: 18px; }

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ---------- toggle switch ---------- */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 22px;
  cursor: pointer;
}

.toggle-switch input { display: none; }

.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--bg-active);
  border-radius: 11px;
  transition: background var(--transition);
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  background: var(--text-primary);
  border-radius: 50%;
  transition: transform var(--transition);
  box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked ~ .toggle-track { background: var(--accent); }
.toggle-switch input:checked ~ .toggle-thumb { transform: translateX(16px); }

/* ---------- admin layout ---------- */
.admin-layout {
  display: flex;
  padding-top: var(--navbar-height);
  min-height: 100vh;
}

.admin-sidebar {
  position: sticky;
  top: var(--navbar-height);
  align-self: flex-start;
  width: 200px;
  min-height: calc(100vh - var(--navbar-height));
  background: var(--bg-primary);
  border-right: 1px solid var(--border);
  padding: 16px 0;
  flex-shrink: 0;
}

.admin-sidebar .sidebar-label {
  padding: 8px 20px 6px;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
}

.admin-sidebar a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  color: var(--text-secondary);
  font-size: 0.86rem;
  transition: all var(--transition-fast);
}

.admin-sidebar a svg { width: 16px; height: 16px; opacity: 0.5; }

.admin-sidebar a:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.admin-sidebar a:hover svg { opacity: 0.8; }

.admin-sidebar a.active {
  background: var(--accent-subtle);
  color: var(--accent);
  font-weight: 500;
}

.admin-sidebar a.active svg { opacity: 1; color: var(--accent); }

.admin-content {
  flex: 1;
  padding: 28px 32px 48px;
  min-width: 0;
  max-width: 1100px;
}

.admin-header {
  margin-bottom: 24px;
}

.admin-header h2 { margin-bottom: 4px; }

.admin-header p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.admin-header-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

/* ---------- auth pages ---------- */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-deep);
  padding: var(--navbar-height) 20px 20px;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px 28px;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: var(--shadow-glow);
}

.auth-logo svg { width: 24px; height: 24px; color: #fff; }

.auth-title {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.auth-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 28px;
}

.auth-divider {
  text-align: center;
  margin: 18px 0 0;
  color: var(--text-tertiary);
  font-size: 0.82rem;
  cursor: pointer;
  transition: color var(--transition-fast);
  padding: 8px 0;
}

.auth-divider:hover { color: var(--accent); }

.auth-error {
  background: var(--danger-bg);
  border: 1px solid rgba(239,68,68,0.2);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  margin-bottom: 16px;
  display: none;
}

/* ---------- settings layout ---------- */
.settings-layout {
  padding-top: var(--navbar-height);
  max-width: 720px;
  margin: 0 auto;
  padding: calc(var(--navbar-height) + 28px) 24px 48px;
}

.settings-section {
  margin-bottom: 32px;
}

.settings-section h3 {
  margin-bottom: 4px;
}

.settings-section p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* ---------- toast ---------- */
.toast {
  position: fixed;
  top: calc(var(--navbar-height) + 16px);
  right: 20px;
  padding: 12px 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  color: var(--text-primary);
  z-index: 300;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.25s ease-out;
  max-width: 380px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.toast-success { border-left: 3px solid var(--success); }
.toast.toast-error { border-left: 3px solid var(--danger); }
.toast.toast-info { border-left: 3px solid var(--accent); }

.toast.toast-out { animation: toastOut 0.2s ease-in forwards; }

/* ---------- empty state ---------- */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-tertiary);
}

.empty-state svg { width: 48px; height: 48px; margin-bottom: 16px; opacity: 0.3; }
.empty-state p { font-size: 0.9rem; margin-bottom: 16px; }

/* ---------- spinner ---------- */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-lg { width: 32px; height: 32px; border-width: 3px; }

/* ---------- modal overlay ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 250;
  backdrop-filter: blur(4px);
}

.modal-overlay.open { display: flex; animation: fadeIn 0.15s ease-out; }

.modal {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 480px;
  width: 90%;
  box-shadow: var(--shadow-lg);
}

.modal-title { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.modal-body { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 20px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; }

/* ---------- animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes msgFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes spin { to { transform: rotate(360deg); } }

@keyframes cursorBlink { 50% { opacity: 0; } }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(16px); }
}

/* ---------- scrollbar ---------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

/* ---------- responsive ---------- */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    width: 280px;
    z-index: 90;
  }

  .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }

  .sidebar-overlay {
    position: fixed;
    inset: 0;
    top: var(--navbar-height);
    background: rgba(0,0,0,0.5);
    z-index: 80;
    display: none;
  }

  .sidebar-overlay.open { display: block; }

  .layout-with-sidebar .main-area { margin-left: 0; width: 100%; }
  .admin-sidebar { display: none; }
  .admin-content { padding: 20px 16px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .chat-input-bar { padding: 12px 12px 16px; }
  .messages-container { padding: 16px 14px 12px; }
  .nav-right .nav-link { padding: 6px 8px; font-size: 0.78rem; }
  .welcome-screen h1 { font-size: 1.5rem; }
  .auth-card { padding: 28px 24px 24px; }
}

@media (max-width: 480px) {
  .stat-grid { grid-template-columns: 1fr; }
  .welcome-suggestions { flex-direction: column; align-items: center; }
}

/* ---------- hljs overrides ---------- */
.hljs { background: transparent !important; padding: 0 !important; }