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

:root {
  --bg: #f5f5f5;
  --card: #ffffff;
  --ink: #111111;
  --muted: #aaa;
  --border: #e8e8e8;
}

body {
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 3rem 1rem;
}

.card {
  width: 100%;
  max-width: 480px;
}

h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.subtitle {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 2.5rem;
}

.section { margin-bottom: 1.2rem; }

.section-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--muted);
  margin-bottom: 0.5rem;
  display: block;
}

/* Action buttons */
.action-btn {
  display: block;
  width: 100%;
  padding: 1rem 1.2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-bottom: none;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: background 0.1s;
}

.action-btn:last-of-type { border-bottom: 1px solid var(--border); }
.action-btn:hover { background: #f7f7f7; }

/* Expandable */
details {
  border: 1px solid var(--border);
}

details summary {
  padding: 1rem 1.2rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  background: var(--card);
}

details summary::-webkit-details-marker { display: none; }
details summary::after { content: '+'; font-size: 1rem; font-weight: 300; color: var(--muted); }
details[open] summary::after { content: '−'; }

.name-list a {
  display: block;
  padding: 0.85rem 1.2rem;
  text-decoration: none;
  color: var(--ink);
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
  transition: background 0.1s;
  background: var(--card);
}

.name-list a:hover { background: #f7f7f7; }

/* Forms */
.form-stack {
  border: 1px solid var(--border);
  background: var(--card);
  margin-bottom: 1px;
}

.form-stack input,
.form-stack select,
.form-stack textarea {
  width: 100%;
  padding: 0.95rem 1.1rem;
  border: none;
  border-bottom: 1px solid var(--border);
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  background: transparent;
  color: var(--ink);
  display: block;
}

.form-stack input:last-child,
.form-stack select:last-child,
.form-stack textarea:last-child { border-bottom: none; }

.form-stack input:focus,
.form-stack select:focus,
.form-stack textarea:focus { outline: none; background: #fafafa; }

textarea { resize: vertical; min-height: 140px; }

button {
  width: 100%;
  padding: 1rem;
  background: var(--ink);
  color: white;
  border: none;
  font-family: system-ui, sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  cursor: pointer;
  margin-top: 0.75rem;
  transition: opacity 0.12s;
}

button:hover { opacity: 0.7; }

.back {
  display: inline-block;
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
}
.back:hover { color: var(--ink); }

.message-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-bottom: none;
  padding: 1.1rem 1.2rem;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--ink);
}
.message-card:last-of-type { border-bottom: 1px solid var(--border); }

.success { color: #2d7a4f; background: #f2faf5; border: 1px solid #c8e6d4; padding: 0.75rem 1rem; margin-bottom: 0.75rem; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.error { color: #c0392b; background: #fdf5f5; border: 1px solid #f0c8c8; padding: 0.75rem 1rem; margin-bottom: 0.75rem; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.empty { color: var(--muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; text-align: center; padding: 2.5rem 0; }

@media (max-width: 480px) {
  body { padding: 1.5rem 1rem; }
  h1 { font-size: 1.3rem; }
}