:root {
  --color-bg: #ffffff;
  --color-text: #111827;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-border: #e5e7eb;
  --color-error: #b91c1c;
  --color-success: #15803d;
  --color-surface: #f9fafb;
}

:root[data-theme="dark"] {
  --color-bg: #020617;
  --color-text: #e5e7eb;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-border: #1f2937;
  --color-error: #fca5a5;
  --color-success: #4ade80;
  --color-surface: #020617;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
}

.sr-only-focusable {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.sr-only-focusable:focus {
  left: 0.75rem;
  top: 0.75rem;
  width: auto;
  height: auto;
  padding: 0.5rem 0.75rem;
  background-color: var(--color-primary);
  color: #ffffff;
  z-index: 1000;
}

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

a:hover,
button:hover {
  cursor: pointer;
}

header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.navbar {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.navbar a {
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 0.75rem;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1rem 2rem;
}

form {
  display: grid;
  gap: 0.75rem;
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

input,
textarea {
  width: 100%;
  padding: 0.5rem 0.6rem;
  border-radius: 0.375rem;
  border: 1px solid var(--color-border);
  font-size: 0.95rem;
}

button,
input[type="submit"],
input[type="button"] {
  border-radius: 0.375rem;
  border: 1px solid transparent;
  padding: 0.5rem 1rem;
  background-color: var(--color-primary);
  color: white;
  font-weight: 500;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.375rem;
  border: 1px solid transparent;
  padding: 0.5rem 1rem;
  font-weight: 500;
  text-decoration: none;
}

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

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

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

.btn-secondary:hover {
  background-color: var(--color-surface);
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

#flash-messages {
  list-style: none;
  margin: 0;
  padding: 0.5rem 1rem;
}

#flash-messages li {
  margin-bottom: 0.25rem;
}

#flash-messages li[data-category="error"] {
  color: var(--color-error);
}

#flash-messages li[data-category="success"] {
  color: var(--color-success);
}

.error {
  color: var(--color-error);
  font-size: 0.85rem;
}

.hero {
  margin-top: 2.5rem;
  display: grid;
  gap: 2rem;
}

.hero-main {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-kicker {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: var(--color-primary);
}

.hero-subtitle {
  max-width: 36rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-benefits {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.95rem;
  color: #6b7280;
}

:root[data-theme="dark"] .hero-benefits {
  color: #9ca3af;
}

.hero-panel {
  padding: 1rem 1.25rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 55%),
    var(--color-surface);
}

.hero-panel-text {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.hero-example {
  margin: 0 0 0.75rem;
  padding: 0.75rem;
  border-radius: 0.5rem;
  border: 1px dashed var(--color-border);
  background-color: rgba(15, 23, 42, 0.03);
  font-size: 0.85rem;
  white-space: pre-wrap;
}

:root[data-theme="dark"] .hero-example {
  background-color: rgba(15, 23, 42, 0.6);
}

.hero-panel-footer {
  font-size: 0.85rem;
  color: #6b7280;
}

:root[data-theme="dark"] .hero-panel-footer {
  color: #9ca3af;
}

.realtime-panel {
  margin-top: 1.5rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.realtime-panel h2 {
  margin-top: 0;
  font-size: 1rem;
}

.realtime-status {
  margin-bottom: 0.5rem;
}

.confidence-bar {
  position: relative;
  width: 100%;
  height: 0.5rem;
  border-radius: 999px;
  background-color: var(--color-border);
  overflow: hidden;
}

.confidence-bar-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #22c55e, #ef4444);
  transition: width 0.2s ease-out;
}

#realtime-result[data-loading="true"] .realtime-status::after {
  content: " ";
  display: inline-block;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 999px;
  border: 2px solid var(--color-primary);
  border-top-color: transparent;
  margin-left: 0.5rem;
  animation: spin 0.7s linear infinite;
}

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

.theme-toggle {
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  background-color: transparent;
  border-color: var(--color-border);
  color: inherit;
}

@media (max-width: 640px) {
  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }

  main {
    padding-inline: 0.75rem;
  }
}

@media (min-width: 768px) {
  .hero {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr);
    align-items: flex-start;
  }
}