:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --surface: #ffffff;
  --ink: #1d242d;
  --muted: #5b6776;
  --line: #d9e0ea;
  --brand: #11324d;
  --accent: #1f6f78;
  --accent-strong: #0f4a52;
  --warning: #9b6b00;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: var(--brand);
}

.brand-badge {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.95rem;
}

.nav a {
  color: var(--muted);
  font-weight: 600;
}

.nav a.active,
.nav a:hover {
  color: var(--brand);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.hero {
  background: var(--surface);
  padding: 28px;
  border-radius: 18px;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(15, 25, 35, 0.06);
  margin-bottom: 28px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--brand);
}

.hero p {
  margin: 0 0 12px;
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 10px 24px rgba(15, 25, 35, 0.04);
}

.card h2,
.card h3 {
  margin-top: 0;
  color: var(--brand);
}

.card + .card {
  margin-top: 20px;
}

.sidebar {
  display: grid;
  gap: 16px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(31, 111, 120, 0.12);
  color: var(--accent-strong);
}

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

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s ease;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: #0b2233;
}

.btn-secondary {
  background: #fff;
  color: var(--brand);
  border-color: var(--brand);
}

.btn-secondary:hover {
  background: rgba(17, 50, 77, 0.08);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--line);
}

form {
  display: grid;
  gap: 14px;
}

label {
  font-weight: 600;
  color: var(--brand);
}

input,
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  font-size: 0.95rem;
  font-family: inherit;
  background: #fff;
}

textarea {
  resize: vertical;
  min-height: 120px;
}

input[type="file"] {
  padding: 8px;
}

.form-grid {
  display: grid;
  gap: 14px;
}

.form-grid.two {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.notice {
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(31, 111, 120, 0.12);
  color: var(--accent-strong);
  font-weight: 600;
  display: none;
}

.notice.show {
  display: block;
}

.notice.error {
  background: rgba(176, 55, 55, 0.12);
  color: #b03737;
}

.debug {
  background: #0d1b2a;
  color: #d5e6f7;
  border-radius: 12px;
  padding: 16px;
  font-size: 0.85rem;
  overflow-x: auto;
  max-height: 320px;
}

.progress {
  width: 100%;
  height: 10px;
  background: #e3e7ee;
  border-radius: 999px;
  overflow: hidden;
  margin: 12px 0 20px;
}

.progress span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--brand));
  width: 0;
  transition: width 0.3s ease;
}

.response-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.response-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 16px;
  background: #fff;
}

.response-item strong {
  display: block;
  color: var(--brand);
}

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

.footer {
  border-top: 1px solid var(--line);
  padding: 24px 20px 40px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (min-width: 900px) {
  .layout {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    align-items: start;
  }

  .sidebar {
    position: sticky;
    top: 100px;
  }
}