:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #334155;
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #0ea5e9;
  --ok: #22c55e;
  --ok-bg: rgba(34, 197, 94, 0.15);
  --bad: #f87171;
  --bad-bg: rgba(248, 113, 113, 0.15);
  --border: rgba(148, 163, 184, 0.25);
  --radius: 14px;
  --shadow: 0 18px 50px rgba(2, 6, 23, 0.45);
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(56, 189, 248, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(14, 165, 233, 0.12), transparent 50%),
    var(--bg);
}

.wrap {
  width: min(880px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.85);
  z-index: 10;
}

.site-header .wrap {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1rem 0;
  flex-wrap: wrap;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.subtitle { color: var(--muted); font-size: 0.95rem; }

main.wrap { padding: 2rem 0 3rem; }

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
  padding: 1.25rem 0 2rem;
}

.card {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.95), rgba(15, 23, 42, 0.92));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

h1 { margin: 0 0 0.75rem; font-size: clamp(1.6rem, 3vw, 2.1rem); }
h2 { margin: 0 0 0.75rem; font-size: 1.25rem; }
p { color: var(--muted); line-height: 1.55; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin: 1.25rem 0 1.5rem;
}

.stat {
  background: rgba(51, 65, 85, 0.45);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 1rem;
}

.stat strong {
  display: block;
  font-size: 1.4rem;
  color: var(--accent);
}

.stat span { color: var(--muted); font-size: 0.85rem; }

label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text);
  font-weight: 600;
}

input[type="text"] {
  width: 100%;
  max-width: 420px;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text);
  font-size: 1rem;
}

.actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

.btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 0.75rem 1.25rem;
  font-weight: 650;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #082f49;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.progress {
  height: 8px;
  background: rgba(51, 65, 85, 0.7);
  border-radius: 999px;
  overflow: hidden;
  margin: 0.75rem 0 1.25rem;
}

.progress > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #67e8f9);
}

.meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.options {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.65rem;
}

.option {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.55);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.option:hover { border-color: rgba(56, 189, 248, 0.55); }
.option input { margin-top: 0.2rem; accent-color: var(--accent-2); }
.option span { line-height: 1.45; }

.feedback {
  margin-top: 1.25rem;
  border-radius: 12px;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
}

.feedback.ok {
  background: var(--ok-bg);
  border-color: rgba(34, 197, 94, 0.45);
}

.feedback.bad {
  background: var(--bad-bg);
  border-color: rgba(248, 113, 113, 0.45);
}

.feedback h2 {
  margin-bottom: 0.35rem;
  color: var(--text);
}

.feedback.ok h2 { color: var(--ok); }
.feedback.bad h2 { color: var(--bad); }

.feedback p { color: var(--text); margin: 0.35rem 0; }

.category-chip {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent);
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
}

.score-hero {
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  font-weight: 800;
  margin: 0.5rem 0;
}

.pass { color: var(--ok); }
.fail { color: var(--bad); }

.review {
  margin-top: 1.5rem;
  display: grid;
  gap: 0.75rem;
}

.review-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  background: rgba(15, 23, 42, 0.4);
}

.review-item.ok { border-left: 4px solid var(--ok); }
.review-item.bad { border-left: 4px solid var(--bad); }

.validation {
  color: var(--bad);
  margin-top: 0.5rem;
}

@media (max-width: 640px) {
  .card { padding: 1.15rem; }
  .btn { width: 100%; }
}