:root {
  --bg: #000000;
  --surface: #0a0a0a;
  --border: #1a1a1a;
  --text: #e0e0e0;
  --dim: #777777;
  --accent: #cccccc;
  --green: #999999;
  --orange: #aaaaaa;
}
body:has(#theme-switch:checked) {
  --bg: #ffffff;
  --surface: #f6f8fa;
  --border: #d0d7de;
  --text: #1f2328;
  --dim: #656d76;
  --accent: #333333;
  --green: #555555;
  --orange: #666666;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Noto Sans, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  cursor: auto;
}
.container { max-width: 800px; margin: 0 auto; padding: 2rem 1.5rem; flex: 1; }

header {
  text-align: center;
  padding: 2rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}
header h1 {
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--text);
}
body:not(:has(#theme-switch:checked)) header h1 {
  text-shadow: 0 0 8px rgba(255,255,255,0.25), 0 0 25px rgba(255,255,255,0.12), 0 0 50px rgba(255,255,255,0.06);
}
body:has(#theme-switch:checked) header h1 {
  text-shadow: none;
}

#theme-toggle {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 2px solid var(--text);
  background: var(--bg);
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, opacity 0.2s;
  z-index: 999;
  box-shadow: 0 2px 12px rgba(0,0,0,0.5);
  opacity: 0.9;
}
#theme-toggle::before { content: '\2600'; }
body:has(#theme-switch:checked) #theme-toggle::before { content: '\263E'; }
body:not(:has(#theme-switch:checked)) #theme-toggle:hover {
  opacity: 1;
  box-shadow: 0 0 12px rgba(255,255,255,0.35), 0 0 30px rgba(255,255,255,0.12);
  border-color: #fff;
}
body:has(#theme-switch:checked) #theme-toggle:hover {
  opacity: 1;
  box-shadow: 0 0 12px rgba(0,0,0,0.3);
  border-color: #666;
}

.badges {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  font-size: 0.8rem;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--dim);
  background: var(--surface);
  transition: border-color 0.2s, color 0.2s, box-shadow 0.2s;
}
body:not(:has(#theme-switch:checked)) .badge:hover { box-shadow: 0 0 8px rgba(255,255,255,0.15); border-color: var(--text); color: var(--text); }
body:has(#theme-switch:checked) .badge:hover { box-shadow: 0 0 8px rgba(0,0,0,0.1); border-color: var(--text); color: var(--text); }

section { margin-bottom: 2.5rem; }
main > section:last-child { margin-bottom: 0; }
section h2 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.card p { margin-bottom: 0.5rem; }
.card p:last-child { margin-bottom: 0; }

.monero-addr {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.78rem;
  color: var(--text);
  word-break: break-all;
  background: rgba(128,128,128,0.05);
  padding: 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  margin-top: 0.5rem;
  line-height: 1.5;
}

details.card {
  cursor: pointer;
}
details.card summary {
  font-weight: 500;
  cursor: pointer;
  color: var(--dim);
  transition: color 0.2s, text-shadow 0.2s;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
details.card summary::-webkit-details-marker { display: none; }
details.card summary::marker { display: none; content: ''; }
details.card summary::before {
  content: '';
  display: inline-flex;
  width: 0.40rem;
  height: 0.40rem;
  border-right: 1.5px solid var(--dim);
  border-bottom: 1.5px solid var(--dim);
  transform: rotate(-45deg);
  transition: transform 0.25s;
  flex-shrink: 0;
}
details.card[open] summary::before {
  transform: rotate(45deg);
}
body:not(:has(#theme-switch:checked)) details.card summary:hover { color: var(--text); text-shadow: 0 0 6px rgba(255,255,255,0.1); }
body:has(#theme-switch:checked) details.card summary:hover { color: var(--text); }
details.card pre {
  margin-top: 1rem;
  font-size: 0.72rem;
  max-height: 400px;
  overflow-y: auto;
  background: var(--bg);
  padding: 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--dim);
  line-height: 1.3;
  white-space: pre;
  word-break: normal;
}

.challenge-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem;
}
.challenge-box .bounty {
  display: inline-block;
  background: var(--border);
  color: var(--text);
  font-weight: 600;
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

footer {
  text-align: center;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  color: var(--dim);
  font-size: 0.8rem;
}
footer a { color: var(--dim); text-decoration: none; }
body:not(:has(#theme-switch:checked)) footer a:hover { color: var(--text); text-shadow: 0 0 6px rgba(255,255,255,0.15); }
body:has(#theme-switch:checked) footer a:hover { color: var(--text); }

.challenge-box a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
  transition: text-shadow 0.2s, color 0.2s, text-decoration-color 0.2s;
}
body:not(:has(#theme-switch:checked)) .challenge-box a:hover {
  color: var(--text);
  text-shadow: 0 0 8px rgba(255,255,255,0.25), 0 0 20px rgba(255,255,255,0.08);
  text-decoration-color: var(--text);
}
body:has(#theme-switch:checked) .challenge-box a:hover {
  color: var(--text);
  text-shadow: 0 0 8px rgba(0,0,0,0.15);
  text-decoration-color: var(--text);
}


/* Upload form */
.upload-form {
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.upload-form .input-wrap {
  position: relative;
}
.upload-form input[type="file"] {
  display: block;
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
}
.upload-form input[type="file"]::file-selector-button {
  background: var(--border);
  color: var(--text);
  border: none;
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
  margin-right: 0.75rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.2s;
}
.upload-form input[type="file"]::file-selector-button:hover {
  background: var(--dim);
}
.upload-form input[type="password"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
}
.upload-form input[type="password"]:focus {
  border-color: var(--accent);
}
.upload-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.upload-form .btn {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 0.7rem 2.5rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  align-self: center;
  margin-top: 0.25rem;
  letter-spacing: 0.5px;
  transition: border-color 0.25s, color 0.25s, box-shadow 0.25s;
}
body:not(:has(#theme-switch:checked)) .upload-form .btn:hover {
  border-color: var(--text);
  color: var(--text);
  box-shadow: 0 0 8px rgba(255,255,255,0.10);
}
body:has(#theme-switch:checked) .upload-form .btn:hover {
  border-color: var(--text);
  color: var(--text);
  box-shadow: 0 0 6px rgba(0,0,0,0.08);
}
.upload-result {
  text-align: center;
  padding: 2rem 0;
}
.upload-result a {
  color: var(--accent);
  word-break: break-all;
}
.error-msg {
  color: #ff5555;
  font-size: 0.85rem;
  text-align: center;
}

@media (max-width: 600px) {
  .container { padding: 1rem; }
  header h1 { font-size: 1.3rem; }
}