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

:root {
  --bg: #0a0a0f;
  --surface: #111118;
  --border: #1e1e2e;
  --accent: #00ff88;
  --accent-dim: rgba(0, 255, 136, 0.1);
  --accent-mid: rgba(0, 255, 136, 0.3);
  --error: #ff4466;
  --error-dim: rgba(255, 68, 102, 0.1);
  --text: #e0e0f0;
  --muted: #555570;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Syne', sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 24px;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,255,136,0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}

header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  /* gap: 16px; */
  margin-bottom: 40px;
}

.badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--accent);
  border: 1px solid var(--accent-mid);
  padding: 4px 12px;
  border-radius: 2px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 16px;
  background: var(--accent-dim);
}

h1 {
  font-size: clamp(2.125rem, 4.8vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 12px;
}

h1 span {
  color: var(--accent);
}

.subtitle {
  font-family: var(--mono);
  font-size: 1.0625rem;
  color: var(--muted);
  letter-spacing: 0.05em;
  line-height: 1.7;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
}

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

label {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1.85;
  padding: 16px;
  resize: vertical;
  min-height: 200px;
  width: 100%;
  transition: border-color 0.2s;
  outline: none;
}

textarea:focus {
  border-color: var(--accent-mid);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

textarea::placeholder {
  color: var(--muted);
}

.btn {
  width: 100%;
  padding: 16px;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 4px;
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
}

.btn:hover {
  background: #00ffaa;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,255,136,0.25);
}

.btn:active { transform: translateY(0); }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn .spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0,0,0,0.3);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto;
}

.btn.loading .btn-text { display: none; }
.btn.loading .spinner { display: block; }

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

.result {
  display: none;
  border-radius: 4px;
  overflow: hidden;
  animation: fadeUp 0.4s ease;
}

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

.result.visible { display: block; }

.result-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  font-family: var(--mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.result.valid .result-header {
  background: rgba(0,255,136,0.08);
  border: 1px solid rgba(0,255,136,0.2);
  color: var(--accent);
}

.result.invalid .result-header {
  background: rgba(255,68,102,0.08);
  border: 1px solid rgba(255,68,102,0.2);
  color: var(--error);
}

.result-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.result.valid .result-dot { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.result.invalid .result-dot { background: var(--error); box-shadow: 0 0 8px var(--error); }

.result-body {
  padding: 20px;
  border: 1px solid var(--border);
  border-top: none;
  background: var(--surface);
}

.errors-list {
  margin-bottom: 20px;
}

.errors-title {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.error-item {
  font-family: var(--mono);
  font-size: 0.9375rem;
  color: var(--error);
  padding: 8px 12px;
  background: var(--error-dim);
  border-left: 2px solid var(--error);
  margin-bottom: 6px;
  border-radius: 0 2px 2px 0;
}

.ai-section {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  margin-top: 4px;
}

.ai-label {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ai-label::before {
  content: '\25C6';
  color: var(--accent);
  font-size: 8px;
}

.ai-text {
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text);
  white-space: pre-wrap;
}

.ai-text strong { color: var(--accent); font-weight: 600; }

.error-banner {
  display: none;
  padding: 16px 20px;
  background: var(--error-dim);
  border: 1px solid rgba(255,68,102,0.2);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.9375rem;
  color: var(--error);
  margin-bottom: 16px;
  animation: fadeUp 0.3s ease;
}

.error-banner.visible { display: block; }

footer {
  margin-top: 48px;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.9375rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

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

footer a:hover { text-decoration: underline; }

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}
.scope-note {
  margin: -16px 0 28px;
  font-family: var(--mono);
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--muted);
  text-align: center;
}
.logo {
  width: min(460px, 100%);
  height: auto;
  display: block;
  padding: 0;
  margin: 0 auto;
}