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

/* ─── Design Tokens ─────────────────────────────────────────── */
:root {
  --bg-base:        #080b10;
  --bg-surface:     #0f1520;
  --bg-card:        #131b28;
  --bg-card-hover:  #1a2333;

  --accent:         #6366f1;
  --accent-soft:    rgba(99,102,241,0.15);
  --accent-glow:    rgba(99,102,241,0.3);
  --accent-blue:    #3b82f6;
  --accent-green:   #10b981;
  --accent-text:    #818cf8;

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #4b5563;

  --border:         rgba(255,255,255,0.07);
  --border-accent:  rgba(99,102,241,0.4);

  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  18px;
  --radius-xl:  24px;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --transition:  all 0.2s ease;

  --sidebar-w:   260px;
  --header-h:    60px;
  --nav-h:       68px;   /* mobile bottom nav height */
  --input-h:     80px;   /* chat footer height */
}

/* ─── Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}

button { cursor: pointer; font-family: inherit; }
input, textarea { font-family: inherit; }
h1,h2,h3,h4 { font-weight: 600; line-height: 1.3; }
p { color: var(--text-secondary); }

/* ─── App Shell ──────────────────────────────────────────────── */
.app-shell {
  display: flex;
  width: 100%;
  height: 100dvh;
  background:
    radial-gradient(ellipse at 0% 0%, rgba(99,102,241,0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 100% 100%, rgba(30,27,75,0.5) 0%, transparent 50%),
    var(--bg-base);
  overflow: hidden;
}

/* ─── Sidebar (Desktop Only) ─────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  height: 100%;
  background: rgba(15, 21, 32, 0.9);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  gap: 8px;
  overflow: hidden;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 8px 28px;
}

.sidebar-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-logo h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: left;
  width: 100%;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
}

.nav-link.active {
  background: var(--accent-soft);
  color: var(--accent-text);
  box-shadow: inset 0 0 0 1px var(--border-accent);
}

.sidebar-status {
  margin-top: auto;
  padding: 14px 16px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.sidebar-status .label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 6px; }
.sidebar-status .value { font-size: 0.85rem; color: var(--accent-green); display: flex; align-items: center; gap: 7px; }
.sidebar-status .dot { width: 6px; height: 6px; background: currentColor; border-radius: 50%; }

/* ─── Main Content ───────────────────────────────────────────── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-width: 0;
  overflow: hidden;
}

/* ─── View Header ────────────────────────────────────────────── */
.view-header {
  height: var(--header-h);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(8,11,16,0.6);
  backdrop-filter: blur(12px);
  gap: 16px;
  flex-shrink: 0;
  z-index: 10;
}

.view-header h1 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
}

.upload-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--accent-text);
}

/* ─── Scroll Area ────────────────────────────────────────────── */
.scroll-area {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px;
  scroll-behavior: smooth;
}

.scroll-area::-webkit-scrollbar { width: 4px; }
.scroll-area::-webkit-scrollbar-track { background: transparent; }
.scroll-area::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ─── Chat Bubbles ───────────────────────────────────────────── */
.chat-container { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }

.message-bubble {
  display: flex;
  flex-direction: column;
  max-width: 75%;
  animation: fadeSlideUp 0.25s ease forwards;
}

.message-bubble.user { align-self: flex-end; }
.message-bubble.assistant { align-self: flex-start; }

.bubble-content {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 0.92rem;
  line-height: 1.65;
  word-break: break-word;
}

.message-bubble.user .bubble-content {
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.message-bubble.assistant .bubble-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

.bubble-source {
  font-size: 0.72rem;
  color: var(--text-muted);
  padding: 4px 8px 0;
}

.typing-indicator .bubble-content {
  color: var(--text-secondary);
  font-style: italic;
}

/* ─── Chat Input Footer ──────────────────────────────────────── */
.input-frame {
  flex-shrink: 0;
  padding: 12px 24px 16px;
  background: linear-gradient(to top, var(--bg-base) 60%, transparent);
  display: flex;
  justify-content: center;
}

.input-frame .glass-input {
  width: 100%;
  max-width: 760px;
}

.glass-input {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 6px 8px 6px 16px;
  transition: var(--transition);
}

.glass-input:focus-within {
  border-color: var(--border-accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.chat-field {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  padding: 8px 0;
  min-width: 0;
}

.chat-field::placeholder { color: var(--text-muted); }

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-icon:hover { color: var(--text-primary); background: rgba(255,255,255,0.07); }

.btn-send {
  background: var(--accent);
  border: none;
  border-radius: var(--radius-md);
  padding: 9px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}
.btn-send:hover:not(:disabled) { background: #5254d4; }
.btn-send:disabled { opacity: 0.5; cursor: not-allowed; }

/* ─── Cards & Grids ──────────────────────────────────────────── */
.view-container { max-width: 960px; margin: 0 auto; width: 100%; }

.section-title { font-size: 1.4rem; margin-bottom: 6px; }
.section-subtitle { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 28px; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.premium-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: var(--transition);
}
.premium-card:hover { background: var(--bg-card-hover); border-color: rgba(255,255,255,0.1); }

.doc-card {
  display: flex;
  align-items: center;
  gap: 14px;
  overflow: hidden; /* contain children */
}
.doc-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;  /* prevent icon from shrinking */
  background: var(--accent-soft);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-text);
  flex-shrink: 0;
}
.doc-text {
  min-width: 0;     /* KEY: allows flex child to shrink below content size */
  overflow: hidden;
}
.doc-name { font-weight: 600; font-size: 0.88rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.doc-sub  { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }

.btn-delete {
  margin-left: auto;
  flex-shrink: 0;
  background: transparent;
  border: none;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-delete:hover { color: #f87171; background: rgba(248,113,113,0.1); }

/* ─── Eval View ──────────────────────────────────────────────── */
.eval-input-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 28px;
}

.eval-input {
  flex: 1;
  min-width: 200px;
  padding: 11px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}
.eval-input:focus { border-color: var(--border-accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.eval-input::placeholder { color: var(--text-muted); }

.btn-primary {
  background: var(--accent);
  color: white;
  border: none;
  padding: 11px 22px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary:hover:not(:disabled) { background: #5254d4; transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
.metric-card { text-align: center; padding: 24px 16px; }
.metric-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 10px; }
.metric-value { font-size: 2.2rem; font-weight: 700; line-height: 1; }

.audit-log-item {
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: linear-gradient(90deg, rgba(99,102,241,0.04), transparent);
  margin-bottom: 16px;
}
.audit-q { font-weight: 600; color: var(--accent-text); display: flex; align-items: center; gap: 8px; margin-bottom: 12px; font-size: 0.9rem; }
.audit-answer { font-size: 0.9rem; line-height: 1.6; margin-bottom: 14px; color: var(--text-secondary); }
.audit-gt { padding: 12px; background: var(--bg-base); border-radius: var(--radius-sm); border: 1px solid var(--border); }
.audit-gt-label { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); font-weight: 700; margin-bottom: 6px; }
.audit-gt-text { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }

.eval-empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ─── Mobile Bottom Nav ──────────────────────────────────────── */
.mobile-nav-bar {
  display: none; /* Hidden on desktop */
}

/* ─── Animations ─────────────────────────────────────────────── */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.animate-spin { animation: spin 1s linear infinite; }

/* ─── Mobile Responsive (<= 768px) ──────────────────────────── */
@media (max-width: 768px) {
  /* Hide desktop sidebar */
  .sidebar { display: none; }

  /* Full height minus nav bar */
  .main-content { height: 100dvh; }

  /* Show mobile bottom nav */
  .mobile-nav-bar {
    display: flex;
    flex-shrink: 0;
    height: var(--nav-h);
    background: rgba(15,21,32,0.97);
    backdrop-filter: blur(16px);
    border-top: 1px solid var(--border);
    padding-bottom: env(safe-area-inset-bottom);
  }

  .mobile-nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 8px 4px;
    transition: var(--transition);
  }
  .mobile-nav-btn.active { color: var(--accent-text); }
  .mobile-nav-btn.active svg { filter: drop-shadow(0 0 6px var(--accent)); }

  /* Adjust scroll area so content clears the nav bar */
  .scroll-area { padding: 16px; }

  /* Chat: ensure footer clears the nav bar */
  .input-frame { padding: 8px 12px 12px; }

  /* Eval: stack metrics vertically */
  .metrics-grid { grid-template-columns: 1fr; gap: 12px; }
  .metric-card { padding: 16px; display: flex; align-items: center; gap: 16px; text-align: left; }
  .metric-value { font-size: 1.6rem; }

  /* Library: single column, proper box */
  .card-grid { grid-template-columns: 1fr; gap: 12px; }
  .doc-card { width: 100%; min-width: 0; overflow: hidden; }
  .doc-name { font-size: 0.85rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }

  /* Slightly reduce padding */
  .premium-card { padding: 16px; }

  /* Chat bubbles wider on mobile */
  .message-bubble { max-width: 90%; }
}

/* ─── Login Screen ───────────────────────────────────────────── */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: 
    radial-gradient(circle at 10% 20%, rgba(99,102,241,0.15) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(59,130,246,0.1) 0%, transparent 40%),
    #080b10;
  padding: 24px;
}

.login-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 32px;
  max-width: 420px;
  width: 100%;
  padding: 48px 32px;
  text-align: center;
  animation: fadeSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 16px;
  background: white;
  border: none;
  border-radius: 18px;
  color: #1f2937;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  margin-top: 12px;
}

.btn-google:hover {
  background: #f9fafb;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

/* ─── Sidebar User ───────────────────────────────────────────── */
.sidebar-user {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 20px 8px 0;
}

.user-info img {
  border: 2px solid var(--border-accent);
  padding: 2px;
}

.user-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.user-email {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ─── Header Login Button ─────────────────────────────────────── */
.header-login-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--accent-soft);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  color: var(--accent-text);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}
.header-login-btn:hover {
  background: rgba(99,102,241,0.25);
  transform: translateY(-1px);
}
@media (max-width: 480px) {
  .header-login-label { display: none; }
  .header-login-btn { padding: 8px; }
}

/* ─── Login Modal ─────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: rgba(19, 27, 40, 0.98);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 28px;
  padding: 48px 36px 36px;
  text-align: center;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.07);
  animation: modalSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(24px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(255,255,255,0.06);
  border: none;
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}
.modal-close:hover { background: rgba(255,255,255,0.12); color: var(--text-primary); }

.modal-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin: 0 auto 20px;
  box-shadow: 0 8px 24px rgba(99,102,241,0.35);
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.modal-subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.modal-pills {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.modal-pill {
  padding: 4px 12px;
  background: var(--accent-soft);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: 999px;
  font-size: 12px;
  color: var(--accent-text);
  font-weight: 500;
}

.modal-google-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 15px 24px;
  background: white;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: #1f2937;
  transition: all 0.25s ease;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.modal-google-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.modal-google-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.modal-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(0,0,0,0.15);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.modal-footer {
  margin-top: 16px;
  font-size: 11px;
  color: var(--text-muted);
}

@media (max-width: 480px) {
  .modal-card { padding: 40px 24px 28px; border-radius: 24px; }
  .modal-title { font-size: 1.2rem; }
}