:root {
  --bg0: #070b14;
  --bg1: #0d1526;
  --card: rgba(16, 28, 48, 0.88);
  --line: rgba(120, 160, 220, 0.22);
  --text: #eef4ff;
  --muted: #93a7c4;
  --accent: #3ecf8e;
  --accent2: #2b8cee;
  --danger: #ff6b7a;
  --footer-bg: #000000;
  --radius: 18px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  background:
    radial-gradient(1000px 500px at 15% -10%, rgba(43, 140, 238, 0.28), transparent 60%),
    radial-gradient(800px 420px at 90% 10%, rgba(62, 207, 142, 0.18), transparent 55%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 55%, #0a1220);
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
}

.main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 0 2rem;
}

.hero-logo {
  display: block;
  width: min(520px, 100%);
  margin: 0 auto 1.5rem;
  filter: drop-shadow(0 12px 40px rgba(43, 140, 238, 0.35));
}

.card {
  width: min(440px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  padding: 1.75rem 1.6rem 1.5rem;
}

.card h1 {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.card .sub {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.85rem 0 0.35rem;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.65);
  color: var(--text);
  border-radius: 12px;
  padding: 0.78rem 0.9rem;
  font-size: 1rem;
}

input:focus {
  outline: 2px solid rgba(62, 207, 142, 0.45);
  border-color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
  margin-top: 1.25rem;
  border: 0;
  border-radius: 12px;
  padding: 0.85rem 1rem;
  font-size: 1rem;
  font-weight: 650;
  cursor: pointer;
  color: #041018;
  background: linear-gradient(135deg, var(--accent), #2bb673 40%, var(--accent2));
}

.btn:hover { filter: brightness(1.05); }
.btn.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}

.btn.secondary:hover { background: rgba(255, 255, 255, 0.04); }

.error {
  background: rgba(255, 107, 122, 0.12);
  border: 1px solid rgba(255, 107, 122, 0.35);
  color: #ffc2c8;
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  margin-bottom: 0.85rem;
  font-size: 0.92rem;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  width: min(920px, 100%);
}

.hub-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
  box-shadow: var(--shadow);
}

.hub-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.hub-card p {
  margin: 0 0 1rem;
  color: var(--muted);
  line-height: 1.5;
  font-size: 0.95rem;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(62, 207, 142, 0.35);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  margin-bottom: 0.7rem;
}

.guide {
  width: min(860px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem 1.5rem 2rem;
}

.guide h1 { margin-top: 0; }
.guide h2 {
  margin-top: 1.75rem;
  font-size: 1.15rem;
  color: #d7e6ff;
}
.guide p, .guide li { color: var(--muted); line-height: 1.55; }
.guide code, .guide pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
}
.guide code {
  background: rgba(0, 0, 0, 0.35);
  padding: 0.1rem 0.35rem;
  border-radius: 6px;
  color: #c9f7e0;
}
.guide pre {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  overflow: auto;
  color: #dce8ff;
}
.guide table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.92rem;
}
.guide th, .guide td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.65rem;
  text-align: left;
  vertical-align: top;
}
.guide th { background: rgba(255, 255, 255, 0.04); color: var(--text); }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0 0.5rem;
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
}
.topbar nav { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.topbar a {
  color: var(--muted);
  font-size: 0.92rem;
}
.topbar a:hover { color: var(--text); }

.footer {
  margin-top: auto;
  background: var(--footer-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 1.1rem 1rem;
}
.footer-inner {
  width: min(1080px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.footer .powered {
  color: #9aa3b5;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}
.footer img {
  height: 36px;
  width: auto;
  display: block;
}