:root {
  --bg: #03040a;
  --panel: rgba(6, 9, 20, 0.78);
  --accent: #6ed8ff;
  --accent-2: #ff5aa8;
  --accent-dark: #f8f9ff;
  --text: #f2f4ff;
  --muted: #b9c2e0;
  --border: rgba(255, 255, 255, 0.16);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.42);
  --image-url: url("images/blackhole-kite-3.png");
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    linear-gradient(140deg, rgba(3, 4, 10, 0.8) 0%, rgba(6, 10, 25, 0.9) 45%, rgba(19, 26, 54, 0.92) 100%),
    var(--image-url) center/cover no-repeat;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(110, 216, 255, 0.18), transparent 28%),
    radial-gradient(circle at 85% 18%, rgba(255, 90, 168, 0.2), transparent 24%),
    radial-gradient(circle at center, rgba(255,255,255,0.05), transparent 55%);
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: 0.9;
}

.page-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: linear-gradient(180deg, rgba(4, 7, 16, 0.95) 0%, rgba(13, 19, 37, 0.9) 100%);
  color: #f8ebf2;
  padding: 2rem 1.25rem;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.sidebar h2 {
  margin-top: 0;
  font-size: 1.5rem;
}

.sidebar p {
  color: #d8def6;
  line-height: 1.6;
}

.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.sidebar a {
  color: #f8ebf2;
  text-decoration: none;
  padding: 0.7rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar a.active,
.sidebar a:hover {
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #07111c;
}

.content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero {
  background:
    linear-gradient(135deg, rgba(5, 9, 22, 0.78), rgba(22, 35, 68, 0.64)),
    var(--image-url) center/cover no-repeat;
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 2rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% 50% auto -20%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(110, 216, 255, 0.26), transparent 72%);
  filter: blur(18px);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.8rem;
  color: #8ddcff;
  font-weight: 700;
}

.hero h1 {
  font-size: clamp(2rem, 3vw, 2.8rem);
  margin: 0.2rem 0 0.8rem;
}

.hero-copy {
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 700px;
  color: #dfe7ff;
}

.button {
  display: inline-block;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  margin-top: 0.8rem;
}

.button.primary {
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #07111c;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.25rem 1.4rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.card h2 {
  margin-top: 0;
  color: #f6f8ff;
}

.card p {
  color: var(--muted);
  line-height: 1.7;
}

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

.links-grid a {
  text-decoration: none;
  color: #fff;
  padding: 0.7rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.links-grid a:hover {
  background: rgba(255, 255, 255, 0.16);
  transform: translateY(-1px);
}

.song-page {
  max-width: 760px;
  margin: 2rem auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.song-page h1 {
  margin-top: 0;
}

.song-page a {
  color: var(--accent-dark);
}

.log-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 1rem 0 0.5rem;
}

.log-form input {
  flex: 1 1 220px;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.log-status {
  color: var(--accent);
  margin-bottom: 1rem;
}

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

.log-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.log-table th,
.log-table td {
  text-align: left;
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  vertical-align: top;
}

.log-table thead {
  background: rgba(255, 255, 255, 0.06);
}

.log-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.04);
}

.badge {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: rgba(110, 216, 255, 0.2);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
}

.log-table pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(3, 4, 10, 0.5);
  padding: 0.75rem;
  border-radius: 12px;
  color: var(--muted);
  overflow-x: auto;
  margin: 0;
  min-width: 200px;
}

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

@media (max-width: 800px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    padding-bottom: 1rem;
  }

  .content {
    padding: 1rem;
  }
}