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

:root {
  --bg: #0a0a0f;
  --bg2: #111118;
  --bg3: #1a1a24;
  --border: rgba(255,255,255,0.08);
  --border2: rgba(255,255,255,0.12);
  --text: #f0f0f5;
  --text2: #9090a8;
  --text3: #6060780;
  --accent: #7c6dfa;
  --accent2: #a89dfc;
  --green: #22c987;
  --red: #ff5c5c;
  --amber: #ffa930;
  --radius: 12px;
  --radius-sm: 8px;
  --navbar-h: 56px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.hidden { display: none !important; }

/* Auth gate */
.auth-gate {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.auth-gate-inner { text-align: center; }
.auth-logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent2);
  margin-bottom: 1.5rem;
}
.auth-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Navbar */
.navbar {
  height: var(--navbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(10,10,15,0.9);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 1rem;
}
.navbar-left { display: flex; align-items: center; gap: 0.5rem; }
.navbar-brand {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text2);
  text-decoration: none;
  transition: color 0.2s;
}
.navbar-brand:hover { color: var(--text); }
.navbar-sep { color: var(--border2); font-size: 0.9rem; }
.navbar-product {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent2);
}
.navbar-tabs { display: flex; gap: 0.25rem; }
.nav-tab {
  background: none;
  border: none;
  color: var(--text2);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.875rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}
.nav-tab:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-tab.active { color: var(--text); background: rgba(255,255,255,0.08); }
.navbar-right { display: flex; align-items: center; gap: 0.75rem; }
.plan-badge {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  background: rgba(124,109,250,0.12);
  color: var(--accent2);
  border: 1px solid rgba(124,109,250,0.2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.plan-badge.pro { background: rgba(34,201,135,0.1); color: var(--green); border-color: rgba(34,201,135,0.2); }
.plan-badge.agency { background: rgba(255,169,48,0.1); color: var(--amber); border-color: rgba(255,169,48,0.2); }
.upgrade-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.9rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
}
.upgrade-btn:hover { opacity: 0.85; }
.user-menu { position: relative; }
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
}
.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 0.5rem;
  min-width: 180px;
  z-index: 200;
}
.user-email {
  font-size: 0.78rem;
  color: var(--text2);
  padding: 0.35rem 0.5rem;
  word-break: break-all;
}
.user-dropdown hr { border: none; border-top: 1px solid var(--border); margin: 0.35rem 0; }
.user-dropdown button {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  padding: 0.4rem 0.5rem;
  text-align: left;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
}
.user-dropdown button:hover { background: rgba(255,255,255,0.05); }

/* Tab content */
.tab-content { min-height: calc(100vh - var(--navbar-h)); }

/* Search */
.search-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
  text-align: center;
}
.search-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.search-sub { font-size: 0.95rem; color: var(--text2); margin-bottom: 2rem; }
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.35rem 0.35rem 0.35rem 1rem;
  gap: 0.5rem;
  transition: border-color 0.2s;
}
.search-box:focus-within { border-color: var(--accent); }
.search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  padding: 0.5rem 0;
}
.search-input::placeholder { color: var(--text2); }
.lang-select {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  padding: 0.4rem 0.5rem;
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
}
.search-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.25rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}
.search-btn:hover { opacity: 0.85; }
.search-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.search-meta { font-size: 0.78rem; color: var(--text2); margin-top: 0.6rem; }
.spinner { width: 16px; height: 16px; animation: spin 0.8s linear infinite; }

/* Results */
.results-area { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem 3rem; }
.results-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.results-info { font-size: 0.82rem; color: var(--text2); }
.results-actions { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.filter-select {
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text2);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  padding: 0.4rem 0.65rem;
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
}
.export-btn {
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.2s;
}
.export-btn:hover { border-color: var(--accent); }
.results-table-wrap { overflow-x: auto; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); }
.results-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.results-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text2);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.results-table td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border); color: var(--text); white-space: nowrap; }
.results-table tr:last-child td { border-bottom: none; }
.results-table tr:hover td { background: rgba(255,255,255,0.02); }
.results-table tr.clickable { cursor: pointer; }

/* Intent badges */
.intent { display: inline-block; font-size: 0.7rem; padding: 0.2rem 0.55rem; border-radius: 4px; font-weight: 500; }
.intent-info { background: rgba(124,109,250,0.15); color: var(--accent2); }
.intent-com { background: rgba(34,201,135,0.12); color: var(--green); }
.intent-trans { background: rgba(255,92,92,0.12); color: var(--red); }
.intent-nav { background: rgba(144,144,168,0.12); color: var(--text2); }

/* Diff bar */
.diff-wrap { display: flex; align-items: center; gap: 6px; }
.diff-bar-bg { width: 40px; height: 4px; background: var(--bg3); border-radius: 2px; }
.diff-bar-fill { height: 4px; border-radius: 2px; }

/* Opp score */
.opp-score { display: inline-block; font-size: 0.8rem; font-weight: 500; padding: 0.15rem 0.5rem; border-radius: 4px; }
.opp-high { background: rgba(34,201,135,0.12); color: var(--green); }
.opp-mid { background: rgba(255,169,48,0.1); color: var(--amber); }
.opp-low { background: rgba(255,92,92,0.1); color: var(--red); }

/* Locked row */
.locked-row td { color: var(--text2); opacity: 0.4; }
.locked-row td:first-child { display: flex; align-items: center; gap: 6px; }

/* AI panel */
.ai-panel {
  margin-top: 0.75rem;
  background: rgba(124,109,250,0.06);
  border: 1px solid rgba(124,109,250,0.2);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}
.ai-panel-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.5rem; }
.ai-label { font-size: 0.75rem; font-weight: 500; color: var(--accent2); text-transform: uppercase; letter-spacing: 0.06em; }
.ai-close { background: none; border: none; color: var(--text2); font-size: 1.1rem; cursor: pointer; line-height: 1; }
.ai-content { font-size: 0.875rem; color: var(--text); line-height: 1.6; }

/* Results footer */
.results-footer {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--text2);
  padding: 0.75rem 1rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* Upgrade wall */
.upgrade-wall {
  max-width: 480px;
  margin: 3rem auto;
  padding: 3rem 2rem;
  background: var(--bg2);
  border: 1px solid rgba(124,109,250,0.3);
  border-radius: var(--radius);
  text-align: center;
}
.upgrade-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.upgrade-wall h3 { font-family: 'Syne', sans-serif; font-size: 1.3rem; margin-bottom: 0.5rem; }
.upgrade-wall p { color: var(--text2); font-size: 0.9rem; margin-bottom: 1.5rem; line-height: 1.6; }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.5rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.85; }

/* History */
.history-container { max-width: 720px; margin: 0 auto; padding: 2.5rem 1.5rem; }
.history-header { margin-bottom: 1.5rem; }
.history-header h2 { font-family: 'Syne', sans-serif; font-size: 1.5rem; font-weight: 700; margin-bottom: 0.25rem; }
.history-sub { font-size: 0.875rem; color: var(--text2); }
.history-list { display: flex; flex-direction: column; gap: 0.5rem; }
.history-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: border-color 0.2s;
}
.history-item:hover { border-color: var(--border2); }
.history-topic { font-size: 0.9rem; font-weight: 500; }
.history-meta { font-size: 0.78rem; color: var(--text2); }
.history-empty { text-align: center; color: var(--text2); font-size: 0.9rem; padding: 3rem 0; }
.history-locked {
  text-align: center;
  padding: 3rem 0;
}
.history-locked p { color: var(--text2); margin-bottom: 1rem; }

.history-delete {
  background: none;
  border: none;
  color: var(--text2);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0 0.25rem;
  line-height: 1;
  transition: color 0.2s;
}
.history-delete:hover { color: var(--red); }