:root {
  --bg-top: #edf3f9;
  --bg-bottom: #dbe6f1;
  --panel: rgba(255, 255, 255, 0.88);
  --surface: #ffffff;
  --text-main: #1f2b3a;
  --text-muted: #55657a;
  --accent: #1e628f;
  --accent-strong: #15496d;
  --accent-soft: rgba(30, 98, 143, 0.12);
  --line: #c9d7e4;
  --shadow: 0 20px 42px rgba(20, 40, 60, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
  background: linear-gradient(160deg, var(--bg-top), var(--bg-bottom));
  padding: 24px;
}

.site-page {
  display: grid;
  place-items: center;
}

.shell {
  width: min(980px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  backdrop-filter: blur(3px);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: rise 520ms ease-out;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-header {
  padding: 30px 28px 22px;
  background: linear-gradient(120deg, rgba(30, 98, 143, 0.14), rgba(24, 142, 144, 0.1));
  border-bottom: 1px solid var(--line);
}

.site-title {
  margin: 0;
  font-size: clamp(1.8rem, 3.9vw, 2.6rem);
  letter-spacing: 0.01em;
}

.site-lead {
  margin: 10px 0 0;
  color: var(--text-muted);
  font-size: clamp(1rem, 2vw, 1.1rem);
  line-height: 1.45;
  max-width: 68ch;
}

.site-main {
  display: grid;
  gap: 16px;
  padding: 24px 28px 28px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  padding: 16px;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  color: var(--accent);
}

.card p,
.card li {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

ul {
  margin: 8px 0 0 20px;
  padding: 0;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.links a,
.chip-link {
  text-decoration: none;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 0.95rem;
  background: #fff;
  transition: all 180ms ease;
}

.links a:hover,
.chip-link:hover {
  background: var(--accent);
  color: #fff;
}

.stack-form {
  display: grid;
  gap: 12px;
}

.field-grid {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
}

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

input[type="text"],
input[type="password"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
  font: inherit;
  color: var(--text-main);
  background: #fff;
}

input[readonly] {
  background: #f7fbff;
  font-family: "Consolas", "Courier New", monospace;
}

.btn-primary {
  border: 1px solid var(--accent);
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  padding: 10px 16px;
  cursor: pointer;
  width: fit-content;
}

.btn-primary:hover {
  background: var(--accent-strong);
}

.hint {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-top: -4px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #f7fbff;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 14px 28px;
}

@media (max-width: 680px) {
  body {
    padding: 14px;
  }

  .site-header,
  .site-main,
  .site-footer {
    padding-left: 18px;
    padding-right: 18px;
  }

  .field-grid {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}