.app-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--bg-header);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.logo-area { display: flex; flex-direction: column; gap: 2px; }
.wordmark { font-size: 18px; font-weight: 700; letter-spacing: 0.12em; }
.logo-area .tagline { font-size: 11px; color: var(--text-secondary); letter-spacing: 0.06em; }
.header-left { display: flex; align-items: center; gap: var(--space-5); }
.header-right { display: flex; align-items: center; gap: var(--space-3); align-self: flex-start; }

.gemini-float {
  position: fixed;
  left: clamp(18px, 4vw, 48px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 20;
  pointer-events: none;
}
.gemini-lottie {
  width: clamp(140px, 18vw, 220px);
  height: clamp(140px, 18vw, 220px);
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

@media (max-width: 720px) {
  .app-header { flex-direction: column; align-items: flex-start; gap: var(--space-3); }
  .header-left { width: 100%; justify-content: space-between; }
  .header-right { justify-content: flex-start; }
  .gemini-float { left: 12px; }
  .gemini-lottie { width: 120px; height: 120px; }

  .hero {
    padding: var(--space-7) var(--space-4);
  }

  .hero-content {
    gap: var(--space-4);
  }

  .url-input-container {
    flex-direction: column;
    padding: var(--space-3);
  }

  .guard-panel {
    padding: var(--space-4);
  }

  .guard-panel-header,
  .guard-verdict-header {
    align-items: flex-start;
    flex-direction: column;
  }
}

.hero {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-5);
}

.hero-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 360px);
  align-items: center;
  gap: clamp(var(--space-5), 4vw, 40px);
}

.hero-content {
  max-width: 680px;
  width: 100%;
  justify-self: center;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.hero-tagline { color: var(--text-secondary); font-size: 14px; }

.guard-panel {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)),
    var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  animation: fadeSlideIn 450ms 120ms ease both;
}

.guard-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-secondary), var(--accent-primary), transparent);
  background-size: 200% 100%;
  animation: shimmer 6s linear infinite;
  opacity: 0.8;
}

.guard-panel::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -70px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(124, 106, 247, 0.18), transparent 70%);
  pointer-events: none;
}

.guard-panel-header,
.guard-verdict-header,
.guard-step {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.guard-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.guard-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: rgba(18, 18, 26, 0.88);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
}

.guard-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-secondary);
  box-shadow: 0 0 12px rgba(62, 207, 207, 0.55);
  animation: pulseGlow 2.4s ease-in-out infinite;
}

.guard-title-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

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

.title-icon {
  color: var(--accent-warning);
}

.guard-subtitle {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
}

.guard-description {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.7;
}

.guard-flow {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(26, 26, 38, 0.72);
}

.guard-step {
  justify-content: flex-start;
  color: var(--text-secondary);
  font-size: 12px;
}

.guard-step-node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid var(--border-medium);
  background: rgba(124, 106, 247, 0.12);
  color: var(--accent-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  flex-shrink: 0;
}

.guard-step-line {
  width: 1px;
  height: 12px;
  margin-left: 10px;
  background: linear-gradient(180deg, rgba(62, 207, 207, 0.48), rgba(124, 106, 247, 0.16));
}

.guard-verdict-card {
  position: relative;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, rgba(34, 34, 58, 0.88), rgba(18, 18, 26, 0.92));
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.guard-verdict-label {
  color: var(--text-tertiary);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.guard-verdict-score {
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
}

.guard-verdict-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--accent-warning);
  font-size: 13px;
  font-weight: 600;
}

.guard-verdict-status.success {
  color: var(--accent-success);
}

.guard-verdict-status.warning {
  color: var(--accent-warning);
}

.guard-verdict-status.danger {
  color: var(--accent-danger);
}

.guard-verdict-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.guard-verdict-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.guard-verdict-item {
  color: var(--text-secondary);
  font-size: 12px;
}

.guard-verdict-item.success {
  color: var(--accent-success);
}

.guard-verdict-item.warning {
  color: var(--accent-warning);
}

.guard-verdict-item.danger {
  color: var(--accent-danger);
}

.url-input-container {
  display: flex; gap: var(--space-3);
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-5);
  transition: border-color var(--transition-base);
}
.url-input-container:focus-within {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}
.url-input-container input {
  flex: 1; background: none;
  color: var(--text-primary);
  font-family: var(--font-mono); font-size: 13px;
}

.btn-primary {
  background: var(--accent-primary); color: white;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-weight: 600; font-size: 14px;
  transition: opacity var(--transition-fast), 
              transform var(--transition-fast);
  white-space: nowrap;
}
.btn-primary:hover  { opacity: 0.9; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary {
  background: var(--bg-elevated); color: var(--text-primary);
  border: 1px solid var(--border-medium);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 13px; font-weight: 500;
  transition: background var(--transition-fast);
}
.btn-secondary:hover { background: var(--bg-tertiary); }

.btn-danger {
  background: var(--accent-danger-soft);
  color: var(--accent-danger);
  border: 1px solid var(--border-danger);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 13px; font-weight: 500;
}

.demo-repos {
  display: flex; align-items: center; 
  gap: var(--space-2); justify-content: center;
  flex-wrap: wrap;
}
.demo-pill {
  padding: var(--space-1) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  font-family: var(--font-mono); font-size: 12px;
  color: var(--accent-secondary);
  transition: border-color var(--transition-fast);
}
.demo-pill:hover { border-color: var(--accent-secondary); }

.progress-view {
  max-width: 480px; margin: 0 auto;
  padding: var(--space-8) var(--space-5);
  text-align: center;
}
.progress-lottie {
  width: clamp(88px, 14vw, 120px);
  height: clamp(88px, 14vw, 120px);
  margin: 0 auto var(--space-6);
}
.progress-steps {
  display: flex; flex-direction: column; 
  gap: var(--space-3); text-align: left;
}
.step { 
  display: flex; align-items: center; gap: var(--space-3);
  color: var(--text-tertiary); transition: color var(--transition-base);
}
.step.active  { color: var(--text-primary); }
.step.done    { color: var(--accent-success); }
.step-indicator {
  width: 8px; height: 8px; border-radius: 50%;
  background: currentColor; flex-shrink: 0;
}
.step.active .step-indicator { animation: pulseGlow 1s ease infinite; }

.knowledge-core {
  max-width: 900px; margin: 0 auto;
  padding: var(--space-5);
}

.tab-nav {
  display: flex; gap: var(--space-2); 
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0; margin-bottom: var(--space-5);
}
.tab-btn {
  padding: var(--space-3) var(--space-4);
  color: var(--text-secondary); font-size: 13px; font-weight: 500;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), 
              border-color var(--transition-fast);
  position: relative; bottom: -1px;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { 
  color: var(--accent-primary); 
  border-bottom-color: var(--accent-primary); 
}
.tab-btn.ghost-tab { color: var(--accent-danger); }
.tab-btn.ghost-tab.active { border-bottom-color: var(--accent-danger); }

.badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 18px; height: 18px; padding: 0 var(--space-1);
  background: var(--bg-tertiary); border-radius: 9px;
  font-size: 11px; font-weight: 600; color: var(--text-secondary);
}
.badge.danger { 
  background: var(--accent-danger-soft);
  color: var(--accent-danger); 
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-7);
}
.tool-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex; flex-direction: column; gap: var(--space-3);
}
.tool-header {
  display: flex; align-items: center; gap: var(--space-3);
}
.tool-panel textarea, .tool-panel input {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  color: var(--text-primary);
  resize: vertical;
  transition: border-color var(--transition-fast);
}
.tool-panel textarea:focus, .tool-panel input:focus {
  border-color: var(--accent-primary);
}

.error-message {
  padding: var(--space-3);
  border: 1px solid var(--border-danger);
  color: var(--accent-danger);
  background: var(--accent-danger-soft-2);
  border-radius: var(--radius-md);
}

.progress-hint { color: var(--text-tertiary); font-size: 12px; }

@media (max-width: 980px) {
  .hero-shell {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .hero-content,
  .guard-panel {
    max-width: 680px;
    width: 100%;
    margin: 0 auto;
  }
}