:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #d0d9e4;
  --brand: #0b4b89;
  --brand-2: #08355f;
  --accent: #0ea5e9;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top right, #e8f2ff 0%, var(--bg) 40%);
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  flex-wrap: wrap;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.2rem 1rem 2.5rem;
}

.banner {
  border: 1px solid #c5d7f2;
  background: #eff6ff;
  color: #1e3a8a;
  border-radius: 10px;
  padding: 0.65rem 0.8rem;
  margin-bottom: 1rem;
}

.hero {
  border: 1px solid var(--line);
  background: linear-gradient(140deg, #ffffff 0%, #edf5ff 100%);
  border-radius: 18px;
  padding: 1.25rem;
}

.hero h1 {
  margin: 0;
  font-size: 1.9rem;
}

.hero .headline {
  margin: 0.45rem 0;
  font-size: 1.45rem;
  font-weight: 700;
}

.hero .subheadline {
  margin: 0;
  color: var(--muted);
  max-width: 760px;
}

.cta-row {
  margin-top: 1rem;
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  border-radius: 10px;
  padding: 0.68rem 0.95rem;
  border: 1px solid var(--line);
  font-weight: 600;
}

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

.btn-primary:hover { background: var(--brand-2); text-decoration: none; }

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

.section {
  margin-top: 1rem;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 14px;
  padding: 1rem;
}

.section h2 {
  margin: 0 0 0.55rem;
  font-size: 1.2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  padding: 0.85rem;
}

.muted { color: var(--muted); }

.form-card {
  max-width: 760px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 1rem;
}

label {
  display: block;
  margin-top: 0.75rem;
  font-weight: 600;
}

.helper {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

input, textarea, select, button {
  width: 100%;
  padding: 0.62rem;
  border: 1px solid #9ca3af;
  border-radius: 8px;
  margin-top: 0.3rem;
  font: inherit;
}

.check input {
  width: auto;
  margin-right: 0.4rem;
}

button {
  margin-top: 1rem;
  background: var(--brand);
  color: #fff;
  border: 0;
  cursor: pointer;
  font-weight: 600;
}

button:hover { background: var(--brand-2); }

#error-box {
  display: none;
  margin-top: 0.75rem;
  border: 1px solid #fecaca;
  background: #fff1f2;
  color: #9f1239;
  border-radius: 8px;
  padding: 0.55rem 0.65rem;
}

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--line);
  padding: 0.5rem;
  text-align: left;
  vertical-align: top;
}

.site-footer {
  margin-top: 1.5rem;
  border-top: 1px solid var(--line);
  padding: 0.9rem 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .hero h1 { font-size: 1.55rem; }
  .hero .headline { font-size: 1.2rem; }
  .header-inner { padding: 0.75rem; }
}