:root {
  color-scheme: dark;
  --bg: #020617;
  --panel: rgba(15, 23, 42, 0.75);
  --border: rgba(148, 163, 184, 0.3);
  --text: #e2e8f0;
  --accent: #38bdf8;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica,
    Arial, sans-serif;
  margin: 0;
  background: radial-gradient(circle at 10% 10%, #1d4ed8 0%, #0f172a 40%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.5;
}

.top-banner {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  backdrop-filter: blur(14px);
  background: rgba(2, 6, 23, 0.75);
  border-bottom: 1px solid var(--border);
}

.site-name { margin: 0; font-size: 1.1rem; letter-spacing: 0.04em; }

nav { display: flex; flex-wrap: wrap; gap: 0.8rem; }

nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  border: 1px solid transparent;
}

nav a:hover,
nav a[aria-current="page"] {
  border-color: var(--accent);
  color: #f8fafc;
}

main {
  width: min(1000px, 92vw);
  margin: 2rem auto 3rem;
  display: grid;
  gap: 1rem;
}

section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.2rem;
}

h2 { margin-top: 0; margin-bottom: 0.6rem; }

.placeholder {
  display: inline-block;
  background: rgba(56, 189, 248, 0.16);
  border: 1px dashed rgba(56, 189, 248, 0.7);
  color: #bae6fd;
  border-radius: 10px;
  padding: 0.15rem 0.45rem;
}

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

.auth-form {
  display: grid;
  gap: 0.8rem;
  max-width: 420px;
}

.auth-form input {
  width: 100%;
  background: rgba(15, 23, 42, 0.85);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
}

.auth-form button {
  width: fit-content;
  border: 1px solid var(--accent);
  background: transparent;
  color: #f8fafc;
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
}

.auth-form button:hover {
  background: rgba(56, 189, 248, 0.2);
}

.status {
  min-height: 1.6rem;
  margin: 0.7rem 0 0;
  color: #fca5a5;
}

.hidden {
  display: none;
}

ul { margin: 0; padding-left: 1.2rem; }
li { margin-bottom: 0.7rem; }

footer {
  text-align: center;
  color: #94a3b8;
  padding: 0 1rem 1.5rem;
}