/* ── Reset & Base ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: #f8f9fa;
  color: #212529;
  line-height: 1.6;
}

/* ── Header ─────────────────────────────────────────────────────────── */
header {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  color: #fff;
  padding: 2rem 1rem;
  text-align: center;
}
.header-content { max-width: 800px; margin: 0 auto; }
header h1 { font-size: 2rem; margin-bottom: 0.25rem; }
header .subtitle { opacity: 0.8; font-size: 1.05rem; margin-bottom: 1rem; }
header nav a {
  color: #7ec8e3;
  text-decoration: none;
  margin: 0 0.75rem;
  font-size: 0.95rem;
}
header nav a:hover { text-decoration: underline; }

/* ── Layout ──────────────────────────────────────────────────────────── */
main { max-width: 900px; margin: 2rem auto; padding: 0 1rem; }
.card {
  background: #fff;
  border: 1px solid #dee2e6;
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}
.card-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
@media (max-width: 640px) { .card-row { grid-template-columns: 1fr; } }
.card h2 { font-size: 1.35rem; margin-bottom: 0.5rem; }
.card h3 { font-size: 1.1rem; margin-bottom: 0.75rem; }

/* ── Input ───────────────────────────────────────────────────────────── */
textarea {
  width: 100%;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  padding: 0.75rem;
  border: 1px solid #ced4da;
  border-radius: 6px;
  resize: vertical;
}
textarea:focus { outline: none; border-color: #4a90d9; box-shadow: 0 0 0 3px rgba(74,144,217,0.15); }
.button-row { display: flex; gap: 0.5rem; margin-top: 0.75rem; }
.btn-primary, .btn-secondary {
  padding: 0.55rem 1.25rem;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-primary { background: #1a1a2e; color: #fff; }
.btn-primary:hover { background: #16213e; }
.btn-secondary { background: #e9ecef; color: #212529; }
.btn-secondary:hover { background: #dee2e6; }

/* ── Status messages ─────────────────────────────────────────────────── */
.error { color: #c92a2a; background: #fff5f5; padding: 0.75rem; border-radius: 6px; border: 1px solid #ffc9c9; margin-top: 0.75rem; }
.loading { color: #1864ab; padding: 0.75rem; }
.hidden { display: none; }

/* ── Verdict ─────────────────────────────────────────────────────────── */
.verdict { display: flex; align-items: flex-start; gap: 1rem; padding: 1rem; border-radius: 6px; }
.verdict.pass { background: #ebfbee; border: 1px solid #8ce99a; }
.verdict.fail { background: #fff5f5; border: 1px solid #ffc9c9; }
.verdict-icon { font-size: 2rem; line-height: 1; }
.verdict.pass .verdict-icon { color: #2b8a3e; }
.verdict.fail .verdict-icon { color: #c92a2a; }

/* ── Meta grid ───────────────────────────────────────────────────────── */
.meta-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 0.75rem; margin-bottom: 0.5rem; }
.meta-item { display: flex; flex-direction: column; }
.meta-item.full-width { grid-column: 1 / -1; margin-top: 0.5rem; }
.meta-label { font-size: 0.8rem; color: #868e96; text-transform: uppercase; letter-spacing: 0.03em; }
.meta-value { font-size: 0.95rem; }
.mono { font-family: monospace; font-size: 0.85rem; word-break: break-all; }
.hash-section { margin-top: 0.5rem; }
.hash-section summary { font-size: 0.85rem; color: #495057; cursor: pointer; }
.hash-section code { font-size: 0.78rem; word-break: break-all; }

/* ── Checks list ─────────────────────────────────────────────────────── */
.check-item { display: flex; align-items: center; gap: 0.5rem; padding: 0.4rem 0; border-bottom: 1px solid #f1f3f5; }
.check-pass .check-icon { color: #2b8a3e; }
.check-fail .check-icon { color: #c92a2a; }
.check-label { font-weight: 500; text-transform: capitalize; }
.check-detail { font-size: 0.82rem; color: #868e96; }
.errors-list { margin-top: 0.75rem; padding: 0.75rem; background: #fff5f5; border-radius: 6px; }
.errors-list ul { margin: 0.25rem 0 0 1.25rem; }

/* ── Attestation badges ──────────────────────────────────────────────── */
.badge { display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.75rem; border-radius: 6px; margin-bottom: 0.5rem; }
.badge-icon { font-size: 1.5rem; }
.tee-badge { background: #e7f5ff; border: 1px solid #a5d8ff; }
.tee-badge.absent { background: #f8f9fa; border: 1px solid #dee2e6; opacity: 0.7; }
.rep-badge { background: #fff9db; border: 1px solid #ffd43b; }
.badge-detail { font-size: 0.8rem; color: #868e96; margin-top: 0.15rem; }
.badge p { font-size: 0.85rem; margin-top: 0.15rem; }

/* ── Provenance chain ────────────────────────────────────────────────── */
.chain-node { display: flex; flex-direction: column; padding: 0.5rem; background: #f8f9fa; border-radius: 6px; margin-bottom: 0.25rem; }
.chain-step { font-size: 0.78rem; color: #868e96; }
.chain-arrow { text-align: center; font-size: 1.2rem; color: #adb5bd; padding: 0.15rem 0; }

/* ── Raw JSON ────────────────────────────────────────────────────────── */
pre#raw-json {
  font-size: 0.8rem;
  background: #f8f9fa;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  max-height: 400px;
  margin-top: 0.75rem;
}

/* ── How it works ────────────────────────────────────────────────────── */
.how-it-works { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 1rem 0; }
@media (max-width: 640px) { .how-it-works { grid-template-columns: 1fr; } }
.step { text-align: center; }
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: #1a1a2e;
  color: #fff;
  font-weight: bold;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}
.spec-note { font-size: 0.9rem; color: #495057; margin-top: 1rem; }

/* ── Footer ──────────────────────────────────────────────────────────── */
footer {
  text-align: center;
  padding: 1.5rem 1rem;
  font-size: 0.85rem;
  color: #868e96;
  border-top: 1px solid #dee2e6;
  margin-top: 2rem;
}
footer a { color: #4a90d9; }