:root {
  --bg: #0f1419;
  --panel: #1a222c;
  --panel-2: #243040;
  --text: #e8eef4;
  --muted: #9aa8b5;
  --accent: #3d9a6a;
  --accent-hover: #4db87f;
  --danger: #c45c5c;
  --warn: #c9a227;
  --border: #2e3b4a;
  --radius: 10px;
  --font: "Segoe UI", "Noto Sans TC", "PingFang TC", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(ellipse at top left, #1a2e24 0%, transparent 45%),
    radial-gradient(ellipse at bottom right, #1a2433 0%, transparent 40%),
    var(--bg);
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 420px;
  margin: 2rem auto;
}

.card.wide {
  max-width: 960px;
}

h1, h2, h3 {
  margin-top: 0;
  font-weight: 650;
}

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

label {
  display: block;
  margin: 0.85rem 0 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
}

input, textarea, button, select {
  font: inherit;
}

input, textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
}

textarea {
  min-height: 90px;
  resize: vertical;
}

.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 600;
}

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

.btn.secondary {
  background: var(--panel-2);
  border: 1px solid var(--border);
}

.btn.danger {
  background: var(--danger);
}

.btn.small {
  margin-top: 0;
  padding: 0.35rem 0.7rem;
  font-size: 0.85rem;
}

.flash {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.flash li {
  padding: 0.7rem 0.9rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
}

.flash .success {
  background: #1e3a2c;
  border: 1px solid #2f6b4a;
}

.flash .error {
  background: #3a1e1e;
  border: 1px solid #6b2f2f;
}

.flash .info {
  background: #1e2a3a;
  border: 1px solid #2f4a6b;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.game-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.game-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.table th, .table td {
  text-align: left;
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.actions form {
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
  margin: 0;
}

.actions input[type="password"] {
  width: 140px;
  padding: 0.35rem 0.5rem;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--muted);
}

#game {
  width: 100%;
  max-width: 800px;
  height: 600px;
  margin: 0 auto;
  background: #000;
}

.play-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.links {
  margin-top: 1rem;
  font-size: 0.9rem;
}

.upload-form {
  margin-bottom: 1.25rem;
  padding: 1rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.upload-form input[type="file"] {
  width: auto;
  max-width: 100%;
  padding: 0.35rem 0;
  border: none;
  background: transparent;
}