:root {
  --bg: #07090f;
  --panel: #0f1422;
  --panel-2: #131b2b;
  --line: #243452;
  --text: #e6edf6;
  --muted: #9fb0c9;
  --accent: #20f4a8;
  --accent-2: #00d1ff;
  --danger: #ff5f7a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 10% 10%, #143059 0%, rgba(20, 48, 89, 0) 45%),
    radial-gradient(circle at 90% 20%, #1d4f3f 0%, rgba(29, 79, 63, 0) 40%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

header {
  padding: 22px 0;
  border-bottom: 1px solid #1a253c;
  background: rgba(6, 10, 18, 0.75);
  backdrop-filter: blur(6px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand img {
  width: 40px;
  height: 40px;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  padding: 40px 0 18px;
}

.card {
  background: linear-gradient(180deg, rgba(19, 27, 43, 0.95) 0%, rgba(12, 18, 31, 0.95) 100%);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
}

h1, h2, h3 {
  margin-top: 0;
}

h1 {
  font-size: clamp(1.9rem, 3.7vw, 3rem);
  line-height: 1.1;
}

.subtitle {
  color: var(--muted);
  max-width: 60ch;
}

.tag {
  display: inline-block;
  border: 1px solid #1f725b;
  color: var(--accent);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.metric {
  padding: 14px;
  border-radius: 12px;
  border: 1px solid #233555;
  background: rgba(9, 15, 27, 0.65);
}

.metric strong {
  display: block;
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.upload-form {
  display: grid;
  gap: 12px;
}

label {
  font-weight: 600;
}

input[type="file"],
input[type="text"] {
  width: 100%;
  border: 1px solid #2b3d60;
  background: #091221;
  color: var(--text);
  border-radius: 10px;
  padding: 12px;
}

.button {
  border: 0;
  border-radius: 12px;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  color: #051119;
  padding: 12px 16px;
  font-weight: 700;
  cursor: pointer;
}

.button.secondary {
  background: #122440;
  color: var(--text);
  border: 1px solid #2b3d60;
}

ul.clean {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.small {
  color: var(--muted);
  font-size: 0.92rem;
}

.result-highlight {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
}

.sample {
  background: #070d1a;
  border: 1px solid #1f2e49;
  border-radius: 12px;
  padding: 12px;
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.88rem;
  max-height: 220px;
  overflow: auto;
}

.error {
  border: 1px solid #5a2536;
  background: rgba(63, 18, 31, 0.5);
  color: #ffc4d0;
}

.progress-wrap {
  width: 100%;
  height: 14px;
  border-radius: 999px;
  border: 1px solid #2b3d60;
  background: #07101d;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  transition: width 0.35s ease;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid #274367;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

footer {
  margin-top: 30px;
  padding: 22px 0 30px;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }
}