:root {
  --bg-primary: #0b0e14;
  --bg-secondary: #111620;
  --bg-card: #161b27;
  --bg-card-hover: #1a2030;
  --bg-input: #111620;

  --border: #1e2636;
  --border-focus: #3b82f6;

  --text-primary: #e2e8f0;
  --text-secondary: #8494a7;
  --text-muted: #4a5568;

  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.15);

  --grade-a: #10b981;
  --grade-b: #f59e0b;
  --grade-c: #f97316;
  --grade-d: #ef4444;
  --grade-f: #dc2626;

  --severity-critical: #ef4444;
  --severity-critical-bg: rgba(239, 68, 68, 0.08);
  --severity-warning: #f59e0b;
  --severity-warning-bg: rgba(245, 158, 11, 0.08);
  --severity-info: #3b82f6;
  --severity-info-bg: rgba(59, 130, 246, 0.08);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --font-body: 'Outfit', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

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

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, select {
  font-family: inherit;
  border: none;
  outline: none;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 60px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav__name {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.nav__tabs {
  display: flex;
  gap: 2px;
}

.nav__tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.nav__tab:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav__tab.active {
  color: var(--accent);
  background: var(--accent-glow);
}

.main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.hero {
  text-align: center;
  padding: 3rem 0 2rem;
}

.hero__title {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.hero__accent {
  background: linear-gradient(135deg, var(--accent), #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 300;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 600px;
  margin: 0 auto;
}

.search-box--sm {
  max-width: none;
  flex: 1;
}

.search-box--sm .search-box__input {
  height: 40px;
  font-size: 0.85rem;
}

.search-box__input-wrap {
  flex: 1;
  position: relative;
}

.search-box__icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-box__input {
  width: 100%;
  height: 50px;
  padding: 0 16px 0 44px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box__input::placeholder { color: var(--text-muted); }

.search-box__input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-box--sm .search-box__icon {
  left: 12px;
}

.search-box--sm .search-box__input {
  padding-left: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 24px;
  height: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all 0.2s;
  white-space: nowrap;
}

.button--primary {
  background: var(--accent);
  color: #fff;
}

.button--primary:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-glow);
}

.button--primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.error-msg {
  margin-top: 1rem;
  padding: 10px 16px;
  background: var(--severity-critical-bg);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-sm);
  color: var(--severity-critical);
  font-size: 0.85rem;
  text-align: center;
}

.grade-card {
  text-align: center;
  padding: 2.5rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.grade-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 3px;
  border-radius: 0 0 4px 4px;
}

.grade-card[data-grade^="A"]::before { background: var(--grade-a); }
.grade-card[data-grade^="B"]::before { background: var(--grade-b); }
.grade-card[data-grade^="C"]::before { background: var(--grade-c); }
.grade-card[data-grade^="D"]::before { background: var(--grade-d); }
.grade-card[data-grade="F"]::before  { background: var(--grade-f); }

.grade-card__grade {
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
}

.grade-card[data-grade^="A"] .grade-card__grade { color: var(--grade-a); }
.grade-card[data-grade^="B"] .grade-card__grade { color: var(--grade-b); }
.grade-card[data-grade^="C"] .grade-card__grade { color: var(--grade-c); }
.grade-card[data-grade^="D"] .grade-card__grade { color: var(--grade-d); }
.grade-card[data-grade="F"]  .grade-card__grade { color: var(--grade-f); }

.grade-card__domain {
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  margin-bottom: 0.25rem;
}

.grade-card__score {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.grade-card__score strong {
  color: var(--text-primary);
  font-weight: 600;
}

.grade-card__summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.5;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 1.5rem;
}

.stat {
  text-align: center;
  padding: 1.25rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.stat__count {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  line-height: 1;
  margin-bottom: 4px;
}

.stat--critical .stat__count { color: var(--severity-critical); }
.stat--warning .stat__count  { color: var(--severity-warning); }
.stat--info .stat__count     { color: var(--severity-info); }
.stat--total .stat__count    { color: var(--text-primary); }

.stat__label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.breakdown {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-bottom: 1.5rem;
}

.breakdown__item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.breakdown__label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  font-weight: 500;
}

.breakdown__bar {
  width: 100%;
  height: 6px;
  background: var(--bg-primary);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 6px;
}

.breakdown__fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.8s ease;
}

.breakdown__score {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 600;
}

.findings-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.filter-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

.filter-button {
  padding: 5px 12px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  transition: all 0.15s;
}

.filter-button:hover { color: var(--text-primary); }

.filter-button.active {
  background: var(--accent);
  color: #fff;
}

.filter-select {
  padding: 5px 10px;
  font-size: 0.8rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.findings-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.finding {
  display: grid;
  grid-template-columns: 8px 1fr auto;
  gap: 14px;
  align-items: start;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: background 0.15s;
}

.finding:hover { background: var(--bg-card-hover); }

.finding__indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-top: 7px;
}

.finding[data-severity="critical"] .finding__indicator { background: var(--severity-critical); box-shadow: 0 0 8px var(--severity-critical); }
.finding[data-severity="warning"] .finding__indicator  { background: var(--severity-warning); }
.finding[data-severity="info"] .finding__indicator     { background: var(--severity-info); }

.finding__body {
  min-width: 0;
}

.finding__title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.finding__desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.finding__value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 10px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  color: var(--text-primary);
}

.finding__category {
  display: inline-block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: var(--bg-primary);
  padding: 2px 6px;
  border-radius: 3px;
  margin-top: 6px;
  font-weight: 500;
}

.section-header {
  padding: 2rem 0 1.5rem;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-sub {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.history-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 1.25rem;
  align-items: center;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.history-item {
  display: grid;
  grid-template-columns: 50px 1fr auto auto;
  gap: 16px;
  align-items: center;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s;
}

.history-item:hover { background: var(--bg-card-hover); }

.history-item__grade {
  font-size: 1.3rem;
  font-weight: 700;
  font-family: var(--font-mono);
  text-align: center;
}

.history-item__domain {
  font-weight: 600;
  font-size: 0.95rem;
}

.history-item__date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.history-item__score {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.history-item__actions {
  display: flex;
  gap: 6px;
}

.history-item__delete {
  padding: 6px 10px;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}

.history-item__delete:hover {
  background: var(--severity-critical-bg);
  color: var(--severity-critical);
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 1.5rem;
}

.pagination__button {
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}

.pagination__button:hover { background: var(--bg-card-hover); }
.pagination__button.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.compare-inputs {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.compare-input-group {
  flex: 1;
  min-width: 180px;
}

.compare-input-group .search-box__input {
  height: 46px;
  padding-left: 16px;
}

.compare-vs {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  padding-bottom: 12px;
}

.compare-inputs .button { height: 46px; }

.compare-results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.compare-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.compare-col--winner {
  border-color: var(--grade-a);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.1);
}

.compare-col__header {
  text-align: center;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.compare-col__domain {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.compare-col__grade {
  font-size: 2.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  line-height: 1;
}

.compare-col__score {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.compare-col__winner-badge {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 3px 10px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(16, 185, 129, 0.15);
  color: var(--grade-a);
  border-radius: var(--radius-sm);
}

.compare-stat-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}

.compare-stat-row:last-child { border-bottom: none; }

.compare-stat-label { color: var(--text-secondary); }
.compare-stat-value { font-weight: 600; font-family: var(--font-mono); }

.footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer a {
  color: var(--text-secondary);
  font-weight: 500;
}

.nav__user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav__username {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 4px 12px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
}

.nav__logout {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--severity-critical);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}

.nav__logout:hover {
  background: var(--severity-critical-bg);
}

.auth-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 60px);
  padding: 2rem 1rem;
}

.auth-screen[hidden] { display: none; }

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.4s ease;
}

.auth-card__logo {
  text-align: center;
  margin-bottom: 1rem;
}

.auth-card__title {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.auth-card__sub {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.auth-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 1.5rem;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  padding: 3px;
}

.auth-tab {
  flex: 1;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all 0.15s;
}

.auth-tab:hover { color: var(--text-primary); }

.auth-tab.active {
  background: var(--accent);
  color: #fff;
}

.auth-form { display: none; }
.auth-form.active { display: block; }

.auth-field {
  margin-bottom: 1rem;
}

.auth-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.auth-input {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.auth-input::placeholder { color: var(--text-muted); }

.auth-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
  outline: none;
}

.button--full { width: 100%; margin-top: 0.5rem; }

.auth-form .error-msg {
  text-align: left;
  margin-bottom: 0.5rem;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

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

.results { animation: fadeInUp 0.4s ease; }
.finding { animation: fadeInUp 0.3s ease; animation-fill-mode: both; }
.finding:nth-child(1)  { animation-delay: 0.02s; }
.finding:nth-child(2)  { animation-delay: 0.04s; }
.finding:nth-child(3)  { animation-delay: 0.06s; }
.finding:nth-child(4)  { animation-delay: 0.08s; }
.finding:nth-child(5)  { animation-delay: 0.10s; }
.finding:nth-child(6)  { animation-delay: 0.12s; }
.finding:nth-child(7)  { animation-delay: 0.14s; }
.finding:nth-child(8)  { animation-delay: 0.16s; }
.finding:nth-child(9)  { animation-delay: 0.18s; }
.finding:nth-child(10) { animation-delay: 0.20s; }

@media (max-width: 768px) {
  .nav { padding: 0 1rem; }
  .nav__tabs { gap: 0; }
  .nav__tab { padding: 6px 10px; font-size: 0.8rem; }
  .hero__title { font-size: 1.6rem; }
  .search-box { flex-direction: column; }
  .button { width: 100%; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .breakdown { grid-template-columns: repeat(2, 1fr); }
  .findings-controls { flex-direction: column; align-items: flex-start; }
  .compare-results { grid-template-columns: 1fr; }
  .compare-inputs { flex-direction: column; }
  .compare-vs { text-align: center; padding: 0; }
  .history-item { grid-template-columns: 40px 1fr auto; }
  .history-item__score { display: none; }
  .history-controls { flex-direction: column; }
}