/* Shared layout and typography */
:root {
  --bg: #0f172a;
  --card: #111827;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  /* background: radial-gradient(circle at 20% 20%, rgba(56, 189, 248, 0.12), transparent 25%),
    radial-gradient(circle at 80% 0%, rgba(14, 165, 233, 0.14), transparent 20%),
    linear-gradient(145deg, #0b1224, #0f172a 55%, #0b1224); */
  background: none;
  position: relative;
  color: var(--text);
  font-family: 'Helvetica Neue', 'Segoe UI', sans-serif;
  letter-spacing: 0.01em;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: url('background.jpg') center / cover no-repeat;
  filter: blur(1.5px);
  transform: scale(1.05);
  z-index: -1;
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  background: rgba(17, 24, 39, 0.75);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  display: grid;
  place-items: center;
  color: #0b1224;
  font-weight: 800;
  font-size: 14px;
}

.nav-links {
  display: flex;
  gap: 18px;
  align-items: center;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--muted);
  transition: color 0.2s ease, background 0.2s ease;
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a[aria-current='page'] {
  color: var(--text);
  background: rgba(56, 189, 248, 0.12);
}

.nav-auth-link {
  margin-left: auto;
}

main {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 18px 32px;
}

.content {
  width: 100%;
  max-width: 720px;
}

.panel {
  background: rgba(17, 24, 39, 0.75);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.35);
}

.panel h1 {
  margin: 0 0 10px;
  font-size: 28px;
  letter-spacing: 0.02em;
}

.panel p {
  margin: 0 0 18px;
  color: var(--muted);
}

form {
  display: grid;
  gap: 14px;
  margin-top: 6px;
}

label {
  font-size: 14px;
  color: var(--muted);
}

input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 15px;
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}

input[type="checkbox"] {
  width: auto;
  margin-right: 8px;
  cursor: pointer;
  accent-color: var(--accent);
}

button {
  padding: 12px 14px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #0b1224;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 25px rgba(56, 189, 248, 0.25);
}

table button[type="submit"] {
  padding: 6px 12px;
  background: #ef4444;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.1s ease;
}

table button[type="submit"]:hover {
  background: #dc2626;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  color: var(--text);
}

th,
td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

footer {
  padding: 12px 24px 18px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--border);
  background: rgba(17, 24, 39, 0.78);
  backdrop-filter: blur(8px);
}

.footer-content {
  max-width: 1080px;
  margin: 0 auto;
}

.game-control-btn {
  padding: 10px 20px;
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.2s ease;
  font-size: 14px;
}

.game-control-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}