/*
 * Autonomous BM - Main Styles
 * Built accessibility-first
 */

/* Reset and base */
*, *::before, *::after {
  box-sizing: border-box;
}

:root {
  /* Colors - high contrast by default */
  --color-bg: #0a0a0a;
  --color-surface: #141414;
  --color-surface-elevated: #1a1a1a;
  --color-text: #f5f5f5;
  --color-text-secondary: #a3a3a3;
  --color-primary: #3b82f6;
  --color-primary-hover: #60a5fa;
  --color-accent: #22c55e;
  --color-error: #ef4444;
  --color-border: #333333;

  /* Typography - readable sizes */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Focus ring - highly visible */
  --focus-ring: 0 0 0 3px var(--color-primary);
}

/* High contrast mode */
@media (prefers-contrast: more) {
  :root {
    --color-bg: #000000;
    --color-text: #ffffff;
    --color-border: #ffffff;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Skip link - essential for keyboard navigation */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: white;
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  font-weight: 600;
  z-index: 9999;
  border-radius: 0 0 4px 4px;
}

.skip-link:focus {
  top: 0;
  outline: none;
}

/* Focus styles - always visible */
:focus {
  outline: none;
  box-shadow: var(--focus-ring);
}

:focus:not(:focus-visible) {
  box-shadow: none;
}

:focus-visible {
  box-shadow: var(--focus-ring);
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-primary-hover);
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-md);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Header */
header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-primary);
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-lg);
}

nav a {
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-sm);
}

nav a:hover,
nav a:focus {
  color: var(--color-primary);
}

/* Hero section */
.hero {
  padding: var(--space-3xl) 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
}

.hero .subtitle {
  font-size: 1.5rem;
  color: var(--color-text-secondary);
  max-width: 800px;
  margin: 0 auto var(--space-xl);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-size: 1.125rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Sections */
section {
  padding: var(--space-3xl) 0;
}

section:nth-child(even) {
  background: var(--color-surface);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.card {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-xl);
}

.card h3 {
  margin-bottom: var(--space-sm);
}

.card p {
  color: var(--color-text-secondary);
  margin: 0;
}

/* Feature list */
.feature-list {
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0;
}

.feature-list li {
  padding: var(--space-sm) 0;
  padding-left: var(--space-xl);
  position: relative;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

/* Footer */
footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0;
  text-align: center;
}

footer p {
  margin: var(--space-sm) 0;
  color: var(--color-text-secondary);
}

/* Upload area - NoEyes specific */
.upload-area {
  border: 3px dashed var(--color-border);
  border-radius: 12px;
  padding: var(--space-3xl);
  text-align: center;
  background: var(--color-surface);
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
}

.upload-area:hover,
.upload-area:focus-within {
  border-color: var(--color-primary);
  background: var(--color-surface-elevated);
}

.upload-area input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.upload-area label {
  display: block;
  cursor: pointer;
}

/* Results area */
.results {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-xl);
  margin-top: var(--space-xl);
}

.results h2 {
  margin-bottom: var(--space-lg);
}

.results-content {
  font-family: var(--font-sans);
  line-height: 1.8;
}

.results-section {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.results-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

/* Loading state */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-xl);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Screen reader only text */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Live regions for announcements */
[aria-live] {
  position: relative;
}

/* Staff cards */
.staff-card .role {
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.staff-card .credentials {
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.staff-card .specialties {
  font-size: 0.9rem;
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.staff-card .specialties strong {
  color: var(--color-text);
}

.staff-card p {
  margin-bottom: var(--space-sm);
}

.staff-card h3 {
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

/* Mobile responsive */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .hero h1 {
    font-size: 2rem;
  }

  .hero .subtitle {
    font-size: 1.125rem;
  }

  .header-content {
    flex-direction: column;
    text-align: center;
  }

  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }
}