/* ===================================================================
   InfraGuidAI — Design System
   Modern, sleek dark console. Indigo→violet primary, emerald accents.
   =================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap");

:root {
  /* Surfaces */
  --bg: #070a13;
  --bg-elev: #0c111d;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-2: rgba(255, 255, 255, 0.05);
  --surface-3: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.07);
  --border-strong: rgba(255, 255, 255, 0.12);

  /* Brand */
  --primary: #6366f1;
  --primary-2: #8b5cf6;
  --primary-grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --accent: #10b981;
  --accent-grad: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --success: #10b981;
  --danger: #f43f5e;
  --warn: #f59e0b;

  /* Text */
  --text: #e9edf6;
  --text-dim: #aab2c5;
  --text-muted: #6b7488;

  /* Effects */
  --glass-blur: blur(16px);
  --radius-sm: 9px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 0 1px rgba(99, 102, 241, 0.35), 0 8px 30px rgba(99, 102, 241, 0.25);

  --font: "Inter", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html, body { height: 100%; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(900px 600px at 12% -8%, rgba(99, 102, 241, 0.16), transparent 60%),
    radial-gradient(800px 600px at 100% 0%, rgba(139, 92, 246, 0.12), transparent 55%),
    radial-gradient(700px 700px at 50% 120%, rgba(16, 185, 129, 0.08), transparent 60%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
  overflow: hidden;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 10px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: var(--border-strong); background-clip: content-box; }

a { color: var(--primary-2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===================================================================
   App shell
   =================================================================== */
.app-shell {
  display: grid;
  grid-template-columns: 264px 1fr;
  height: 100vh;
}

/* Sidebar -------------------------------------------------------- */
.sidebar {
  display: flex;
  flex-direction: column;
  padding: 22px 16px;
  background: linear-gradient(180deg, rgba(12, 17, 29, 0.9), rgba(7, 10, 19, 0.9));
  border-right: 1px solid var(--border);
  backdrop-filter: var(--glass-blur);
}

.brand { display: flex; align-items: center; gap: 12px; padding: 6px 8px 22px; }
.brand-icon {
  width: 42px; height: 42px; flex: none;
  display: grid; place-items: center;
  font-weight: 800; font-size: 15px; letter-spacing: -0.5px;
  color: #fff;
  background: var(--primary-grad);
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(99, 102, 241, 0.45);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 16px; font-weight: 700; letter-spacing: -0.2px; }
.brand-text span { font-size: 11.5px; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.6px; }

.nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav a {
  display: flex; align-items: center; gap: 11px;
  padding: 11px 13px;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-weight: 500; font-size: 14px;
  text-decoration: none;
  transition: all 0.16s ease;
}
.nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav a.active {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.18), rgba(139, 92, 246, 0.1));
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.3);
}
.nav-icon { width: 18px; height: 18px; flex: none; }

/* Sidebar user */
.sidebar-user {
  display: flex; align-items: center; gap: 11px;
  margin-top: auto; padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.user-avatar {
  width: 38px; height: 38px; flex: none;
  display: grid; place-items: center;
  font-size: 13px; font-weight: 700; color: #fff;
  background: var(--accent-grad);
  border-radius: 11px;
}
.user-info { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.user-name { font-size: 13.5px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: 11px; color: var(--text-muted); text-transform: capitalize; }
.btn-logout {
  background: transparent; border: none; cursor: pointer;
  color: var(--text-muted); padding: 7px; border-radius: 9px;
  display: grid; place-items: center; transition: all 0.15s ease;
}
.btn-logout:hover { color: var(--danger); background: rgba(244, 63, 94, 0.1); }

/* Main ----------------------------------------------------------- */
.main { display: flex; flex-direction: column; min-width: 0; height: 100vh; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 10, 19, 0.5);
  backdrop-filter: var(--glass-blur);
}
.topbar-left h1 { font-size: 18px; font-weight: 700; letter-spacing: -0.3px; }
.topbar-left p { font-size: 12.5px; color: var(--text-muted); margin-top: 2px; }

.status-pill {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; font-weight: 600;
  padding: 7px 13px; border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.status-pill::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--text-muted);
}
.status-pill.ok { color: #6ee7b7; border-color: rgba(16, 185, 129, 0.3); background: rgba(16, 185, 129, 0.08); }
.status-pill.ok::before { background: var(--accent); box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25); animation: pulse 2s infinite; }
.status-pill.fail { color: #fda4af; border-color: rgba(244, 63, 94, 0.3); background: rgba(244, 63, 94, 0.08); }
.status-pill.fail::before { background: var(--danger); }

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25); }
  50% { box-shadow: 0 0 0 5px rgba(16, 185, 129, 0); }
}

.workspace { flex: 1; min-height: 0; padding: 20px 28px 24px; display: flex; flex-direction: column; }

.alert {
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #fda4af;
  padding: 12px 16px; border-radius: var(--radius);
  font-size: 13.5px; margin-bottom: 14px;
}

/* Chat layout ---------------------------------------------------- */
.chat-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
  flex: 1; min-height: 0;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--glass-blur);
}

.chat-panel { display: flex; flex-direction: column; min-height: 0; overflow: hidden; }

.messages {
  flex: 1; min-height: 0; overflow-y: auto;
  padding: 24px;
  display: flex; flex-direction: column; gap: 18px;
  scroll-behavior: smooth;
}

/* Welcome state */
.welcome-state {
  margin: auto; text-align: center; max-width: 420px;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  animation: fadeUp 0.5s ease;
}
.welcome-icon {
  width: 72px; height: 72px; display: grid; place-items: center;
  color: #fff; background: var(--primary-grad); border-radius: 22px;
  box-shadow: 0 12px 36px rgba(99, 102, 241, 0.4);
}
.welcome-state h2 { font-size: 22px; font-weight: 700; letter-spacing: -0.4px; }
.welcome-state p { color: var(--text-dim); font-size: 14px; }

/* Message bubbles */
.message { display: flex; flex-direction: column; max-width: 82%; animation: fadeUp 0.32s ease; }
.message.user { align-self: flex-end; align-items: flex-end; }
.message.assistant { align-self: flex-start; align-items: flex-start; }

.bubble {
  padding: 13px 16px;
  border-radius: 16px;
  font-size: 14.5px; line-height: 1.6;
  white-space: pre-wrap; word-wrap: break-word;
}
.message.user .bubble {
  background: var(--primary-grad);
  color: #fff;
  border-bottom-right-radius: 5px;
  box-shadow: 0 6px 18px rgba(99, 102, 241, 0.35);
}
.message.assistant .bubble {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-bottom-left-radius: 5px;
  color: var(--text);
}
.message .meta { font-size: 11px; color: var(--text-muted); margin-top: 6px; padding: 0 4px; }

/* Markdown inside assistant bubbles */
.bubble code:not(pre code) {
  font-family: var(--mono); font-size: 12.5px;
  background: rgba(0, 0, 0, 0.35); padding: 2px 6px; border-radius: 6px;
  border: 1px solid var(--border); color: #c4b5fd;
}
.bubble strong { font-weight: 700; color: #fff; }
.code-block {
  position: relative; margin: 10px 0;
  background: #05080f; border: 1px solid var(--border-strong);
  border-radius: 12px; overflow: hidden;
}
.code-block-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 7px 12px; background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border);
  font-size: 11px; color: var(--text-muted); font-family: var(--mono);
  text-transform: uppercase; letter-spacing: 0.5px;
}
.code-block pre {
  margin: 0; padding: 14px; overflow-x: auto;
  font-family: var(--mono); font-size: 12.5px; line-height: 1.65; color: #d7dce8;
}
.copy-btn {
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-dim); cursor: pointer;
  font-size: 11px; padding: 3px 9px; border-radius: 7px; font-family: var(--font);
  transition: all 0.15s ease;
}
.copy-btn:hover { background: var(--surface-3); color: #fff; }
.copy-btn.copied { color: var(--accent); border-color: rgba(16, 185, 129, 0.4); }

/* Typing indicator */
.typing-indicator { display: inline-flex; gap: 5px; padding: 15px 18px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 16px; border-bottom-left-radius: 5px; }
.typing-indicator span { width: 7px; height: 7px; border-radius: 50%; background: var(--text-muted); animation: bounce 1.3s infinite ease-in-out; }
.typing-indicator span:nth-child(2) { animation-delay: 0.18s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.36s; }
@keyframes bounce { 0%, 60%, 100% { transform: translateY(0); opacity: 0.4; } 30% { transform: translateY(-6px); opacity: 1; } }

/* Composer */
.composer {
  display: flex; align-items: flex-end; gap: 10px;
  padding: 14px; margin: 0 14px 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.composer:focus-within { border-color: rgba(99, 102, 241, 0.5); box-shadow: var(--shadow-glow); }
.composer textarea {
  flex: 1; resize: none; border: none; outline: none; background: transparent;
  color: var(--text); font-family: var(--font); font-size: 14.5px; line-height: 1.5;
  max-height: 160px; padding: 6px 4px;
}
.composer textarea::placeholder { color: var(--text-muted); }
.btn-send {
  flex: none; width: 42px; height: 42px;
  display: grid; place-items: center;
  border: none; cursor: pointer; border-radius: 12px;
  color: #fff; background: var(--primary-grad);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn-send:hover { transform: translateY(-1px); }
.btn-send:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-send svg { width: 18px; height: 18px; }

/* Side panel ----------------------------------------------------- */
.side-panel { padding: 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 26px; }
.side-panel h2 {
  font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.8px;
  color: var(--text-muted); margin-bottom: 12px;
}
.quick-actions { display: flex; flex-direction: column; gap: 9px; }
.quick-actions button {
  text-align: left; cursor: pointer;
  padding: 11px 13px; border-radius: var(--radius);
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-dim); font-family: var(--font); font-size: 13px; font-weight: 500;
  transition: all 0.16s ease;
}
.quick-actions button:hover {
  background: var(--surface-3); color: #fff;
  border-color: rgba(99, 102, 241, 0.4); transform: translateX(3px);
}

.source-list { display: flex; flex-direction: column; gap: 10px; }
.source {
  padding: 12px 13px; border-radius: var(--radius);
  background: var(--surface-2); border: 1px solid var(--border);
  transition: border-color 0.15s ease;
}
.source:hover { border-color: var(--border-strong); }
.source strong { display: block; font-size: 13px; font-weight: 600; margin-bottom: 5px; color: var(--text); }
.source-link {
  display: inline-flex; align-items: center;
  font-family: var(--mono); font-size: 11px; color: var(--text-muted);
  word-break: break-all;
}
.source-link:hover { color: var(--primary-2); text-decoration: none; }

/* ===================================================================
   Auth pages
   =================================================================== */
.auth-page {
  min-height: 100vh; display: grid; place-items: center; padding: 24px;
  overflow-y: auto;
}
.auth-card {
  width: 100%; max-width: 410px;
  padding: 38px 34px;
  background: rgba(12, 17, 29, 0.72);
  border: 1px solid var(--border-strong);
  border-radius: 24px;
  backdrop-filter: var(--glass-blur);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
  animation: fadeUp 0.45s ease;
}
.auth-header { text-align: center; margin-bottom: 28px; }
.auth-logo {
  width: 58px; height: 58px; margin: 0 auto 18px;
  display: grid; place-items: center;
  font-size: 20px; font-weight: 800; color: #fff;
  background: var(--primary-grad); border-radius: 17px;
  box-shadow: 0 10px 28px rgba(99, 102, 241, 0.45);
}
.auth-header h1 { font-size: 24px; font-weight: 700; letter-spacing: -0.5px; }
.auth-header p { color: var(--text-dim); font-size: 14px; margin-top: 6px; }

.auth-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group label { font-size: 13px; font-weight: 600; color: var(--text-dim); }
.form-group input, .form-group select {
  width: 100%; padding: 12px 14px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius); color: var(--text);
  font-family: var(--font); font-size: 14px;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}
.form-group input::placeholder { color: var(--text-muted); }
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: rgba(99, 102, 241, 0.6);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}
.auth-form button[type="submit"] {
  margin-top: 6px; padding: 13px;
  border: none; cursor: pointer; border-radius: var(--radius);
  color: #fff; font-family: var(--font); font-size: 14.5px; font-weight: 600;
  background: var(--primary-grad);
  box-shadow: 0 8px 22px rgba(99, 102, 241, 0.4);
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.auth-form button[type="submit"]:hover { transform: translateY(-1px); }
.auth-form button[type="submit"]:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.auth-error {
  display: none;
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #fda4af;
  padding: 11px 14px; border-radius: var(--radius);
  font-size: 13px; margin-bottom: 18px;
}
.auth-error.visible { display: block; animation: fadeUp 0.25s ease; }

.auth-footer { text-align: center; margin-top: 24px; font-size: 13.5px; color: var(--text-dim); }

@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ===================================================================
   Responsive
   =================================================================== */
@media (max-width: 1040px) {
  .chat-layout { grid-template-columns: 1fr; }
  .side-panel { display: none; }
}
@media (max-width: 720px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .workspace { padding: 14px; }
  .message { max-width: 92%; }
}