frontend/src/App.css

/* NeuralVault - Global Component Styles */

.nv-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nv-section {
  padding: 72px 0;
}

/* Nav */
.nv-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.nv-nav.scrolled {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(10, 10, 15, 0.92);
  border-bottom-color: var(--border);
}

/* Cards */
.nv-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.nv-card:hover {
  transform: translateY(-3px);
  border-color: var(--purple-l);
  box-shadow: 0 12px 30px -18px rgba(0, 0, 0, 0.65);
}

/* Buttons */
.nv-btn-primary {
  background: linear-gradient(135deg, #7C3AED, #A855F7);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 11px 22px;
  font-weight: 600;
  font-size: 14px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.1s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.nv-btn-primary:hover {
  opacity: 0.9;
}
.nv-btn-primary:active {
  transform: scale(0.98);
}
.nv-btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.nv-btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text2);
  border-radius: 8px;
  padding: 11px 22px;
  font-weight: 600;
  font-size: 14px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.nv-btn-ghost:hover {
  border-color: var(--text3);
  color: var(--text);
}

/* Badge styles */
.nv-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-body);
}
.nv-badge-purple {
  background: rgba(124, 58, 237, 0.12);
  color: var(--purple-l);
  border: 1px solid rgba(124, 58, 237, 0.25);
}
.nv-badge-teal {
  background: rgba(20, 184, 166, 0.12);
  color: var(--teal);
  border: 1px solid rgba(20, 184, 166, 0.25);
}
.nv-badge-amber {
  background: rgba(245, 158, 11, 0.12);
  color: var(--amber);
  border: 1px solid rgba(245, 158, 11, 0.25);
}
.nv-badge-red {
  background: rgba(239, 68, 68, 0.12);
  color: var(--red);
  border: 1px solid rgba(239, 68, 68, 0.25);
}
.nv-badge-green {
  background: rgba(74, 222, 128, 0.12);
  color: var(--green);
  border: 1px solid rgba(74, 222, 128, 0.25);
}
.nv-badge-gray {
  background: rgba(107, 107, 138, 0.12);
  color: var(--text2);
  border: 1px solid rgba(107, 107, 138, 0.25);
}

/* Terminal */
.nv-terminal {
  background: #0D1117;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.nv-terminal-header {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  background: rgba(28, 28, 40, 0.5);
  border-bottom: 1px solid var(--border);
  gap: 8px;
}
.nv-terminal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.nv-terminal-body {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  min-height: 200px;
  overflow-x: auto;
}

/* Code block */
.nv-code-block {
  background: #0D1117;
  border-left: 3px solid var(--purple);
  border-radius: 0 8px 8px 0;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Tab strip */
.nv-tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow-x: auto;
}
.nv-tab {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text2);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
  border: none;
  background: transparent;
  font-family: var(--font-body);
  white-space: nowrap;
}
.nv-tab:hover {
  color: var(--text);
}
.nv-tab.active {
  background: var(--surface2);
  color: var(--text);
}

/* Input */
.nv-input, .nv-textarea {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 14px;
  width: 100%;
  transition: border-color 0.2s ease;
  outline: none;
}
.nv-input:focus, .nv-textarea:focus {
  border-color: var(--purple);
}
.nv-textarea {
  resize: vertical;
  min-height: 80px;
}

/* Chip */
.nv-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 12px;
  color: var(--text2);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
  font-family: var(--font-body);
}
.nv-chip:hover {
  border-color: var(--purple);
  color: var(--text);
}

/* Loading steps */
.nv-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 13px;
  color: var(--text3);
  font-family: var(--font-mono);
  transition: color 0.3s ease;
}
.nv-step.active {
  color: var(--text);
}
.nv-step.done {
  color: var(--green);
}

/* Score bar */
.nv-score-bar {
  height: 6px;
  background: var(--surface2);
  border-radius: 3px;
  overflow: hidden;
}
.nv-score-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s ease;
}

/* Expandable */
.nv-expandable {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.nv-expandable:hover {
  border-color: var(--text3);
}
.nv-expandable-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  background: var(--surface);
  user-select: none;
}
.nv-expandable-content {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}
.nv-expandable.open .nv-expandable-content {
  max-height: 2000px;
  padding: 0 20px 20px;
}

/* Failure card */
.nv-failure-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--red);
  border-radius: 12px;
  padding: 24px;
}

/* Animate in */
.nv-animate-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.nv-animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Typewriter cursor */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}
.nv-cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: var(--green);
  animation: blink 1s infinite;
  vertical-align: text-bottom;
  margin-left: 2px;
}

/* Spinner */
@keyframes spin {
  to { transform: rotate(360deg); }
}
.nv-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Mobile */
@media (max-width: 768px) {
  .nv-container {
    padding: 0 16px;
  }
  .nv-section {
    padding: 48px 0;
  }
}

/* Reduced motion: respect user preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .nv-cursor {
    animation: none;
    opacity: 1;
  }
  .nv-spinner {
    animation-duration: 1.5s !important;
  }
  .nv-card:hover {
    transform: none;
  }
  .nv-animate-in {
    opacity: 1;
    transform: none;
  }
}

/* Focus visible styles for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--purple-l);
  outline-offset: 2px;
  border-radius: 4px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--purple-l);
  outline-offset: 2px;
}

.nv-tab:focus-visible {
  outline: 2px solid var(--purple-l);
  outline-offset: -2px;
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 100;
  background: var(--purple);
  color: white;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 0 0 8px 0;
  text-decoration: none;
}
.skip-to-content:focus {
  position: fixed;
  left: 0;
  top: 0;
  width: auto;
  height: auto;
  overflow: visible;
  outline: 2px solid var(--purple-l);
  outline-offset: 2px;
}