/* CTF-platform — dark hacker theme */

:root {
  --bg: #0f0f1a;
  --bg-elev: #1a1a2e;
  --bg-card: #1f1f33;
  --border: #2a2a44;
  --text: #e6e6f0;
  --text-dim: #8a8aa3;
  --accent: #00e676;
  --accent-dim: #00b050;
  --danger: #ff5370;
  --warn: #ffb86c;
  --info: #82aaff;
  --mono: 'JetBrains Mono', 'Fira Code', 'Menlo', 'Consolas', monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
}

body {
  display: flex;
  flex-direction: column;
}

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

code, pre, .mono { font-family: var(--mono); }

pre {
  background: #0a0a14;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  overflow-x: auto;
  font-size: 0.9em;
}

code {
  background: #0a0a14;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.92em;
}

pre code {
  background: none;
  border: none;
  padding: 0;
}

h1, h2, h3 {
  font-family: var(--mono);
  letter-spacing: 0.5px;
}

.container {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 20px 80px;
  flex: 1;
}

.page-title {
  color: var(--accent);
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  margin-top: 0;
}

.page-sub {
  color: var(--text-dim);
  margin-top: -10px;
}

.section {
  color: var(--accent);
  border-bottom: 1px dashed var(--border);
  padding-bottom: 6px;
  margin-top: 36px;
}

/* ----- Navbar ----- */
.navbar {
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 12px 24px;
  gap: 20px;
  flex-wrap: wrap;
}

.brand {
  font-family: var(--mono);
  font-size: 1.2em;
  color: var(--accent);
  font-weight: 700;
}

.brand-name { color: var(--text); }
.cursor { color: var(--accent); animation: blink 1s steps(2, start) infinite; }
@keyframes blink { to { visibility: hidden; } }

.nav-links { display: flex; gap: 16px; flex: 1; flex-wrap: wrap; }
.nav-links a {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.95em;
}
.nav-links a:hover { color: var(--accent); text-decoration: none; }

.nav-user { display: flex; align-items: center; gap: 12px; }
.who { color: var(--text-dim); font-family: var(--mono); font-size: 0.9em; }
.logout-form { margin: 0; }

/* ----- Buttons ----- */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.9em;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  text-decoration: none;
  transition: all .15s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn-primary {
  background: var(--accent);
  color: #0a0a14;
  border-color: var(--accent);
  font-weight: 600;
}
.btn-primary:hover { background: var(--accent-dim); color: #0a0a14; }
.btn-ghost { background: transparent; }

/* ----- Login ----- */
.login-screen {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 40px;
  border-radius: 8px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 0 40px rgba(0, 230, 118, 0.05);
}
.login-logo {
  font-family: var(--mono);
  text-align: center;
  font-size: 2em;
  color: var(--accent);
  margin: 0;
}
.login-tag {
  text-align: center;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.85em;
  margin-bottom: 24px;
}
.login-form { display: flex; flex-direction: column; gap: 16px; }
.login-form label { display: flex; flex-direction: column; gap: 6px; }
.login-form span { color: var(--text-dim); font-family: var(--mono); font-size: 0.85em; }
.login-form input, .stack-form input, .stack-form textarea, .submit-form input, .inline-form input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.95em;
}
.login-form input:focus, .stack-form input:focus, .stack-form textarea:focus, .submit-form input:focus {
  outline: none;
  border-color: var(--accent);
}
.hint { color: var(--text-dim); font-size: 0.85em; }

/* ----- Flash ----- */
.flash-stack { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.flash {
  padding: 12px 16px;
  border-radius: 4px;
  border-left: 4px solid var(--text-dim);
  background: var(--bg-elev);
  font-family: var(--mono);
  font-size: 0.9em;
}
.flash-success { border-left-color: var(--accent); }
.flash-error { border-left-color: var(--danger); }
.flash-info { border-left-color: var(--info); }

/* ----- Announcements ----- */
.announcements { margin-bottom: 24px; display: flex; flex-direction: column; gap: 12px; }
.announcement {
  background: var(--bg-elev);
  border-left: 4px solid var(--info);
  padding: 12px 16px;
  border-radius: 4px;
}
.announcement-meta {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.8em;
  display: flex;
  gap: 12px;
  align-items: center;
}
.announcement-body { margin-top: 4px; }
.announcement-body p { margin: 4px 0; }
.inline { display: inline; }

/* ----- Challenge grid ----- */
.challenge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.challenge-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  transition: border-color .15s, transform .15s;
}
.challenge-card:hover:not(.locked) {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.challenge-num {
  font-family: var(--mono);
  color: var(--text-dim);
  font-size: 0.85em;
}
.challenge-title {
  font-family: var(--mono);
  font-size: 1.15em;
  color: var(--text);
}
.challenge-points {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.9em;
}
.challenge-status {
  color: var(--text-dim);
  font-size: 0.85em;
  margin: 8px 0;
}
.challenge-card.locked { opacity: 0.55; }
.challenge-card.solved { border-color: var(--accent-dim); }
.challenge-card.solved .challenge-status { color: var(--accent); }

/* ----- Challenge view ----- */
.back-link {
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--text-dim);
}
.challenge-meta { display: flex; gap: 8px; margin-bottom: 16px; }
.badge {
  display: inline-block;
  padding: 4px 10px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--text-dim);
}
.badge-solved { color: var(--accent); border-color: var(--accent); }

.briefing {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 24px;
  margin-bottom: 24px;
  line-height: 1.55;
}
.briefing h1 { color: var(--accent); margin-top: 0; }
.briefing h2 { color: var(--accent); }
.briefing ul, .briefing ol { padding-left: 24px; }
.briefing table { border-collapse: collapse; margin: 12px 0; }
.briefing th, .briefing td { border: 1px solid var(--border); padding: 6px 10px; }

.file-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.file-list li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 10px 14px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
}
.file-tag {
  margin-left: auto;
  font-size: 0.75em;
  color: var(--accent);
  background: rgba(0, 230, 118, 0.08);
  padding: 2px 8px;
  border-radius: 3px;
}
.file-tag-common { color: var(--info); background: rgba(130, 170, 255, 0.08); }

.submit-form {
  display: flex;
  gap: 8px;
  margin: 12px 0;
}
.submit-form input { flex: 1; }
.submit-locked {
  background: var(--bg-elev);
  border: 1px dashed var(--accent);
  padding: 16px;
  border-radius: 4px;
  color: var(--accent);
  font-family: var(--mono);
}
.rate-tip { color: var(--text-dim); font-size: 0.8em; font-family: var(--mono); }

.submission-table, .leaderboard, .data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.9em;
  margin-top: 12px;
}
.submission-table th, .leaderboard th, .data-table th {
  text-align: left;
  background: var(--bg-elev);
  color: var(--accent);
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}
.submission-table td, .leaderboard td, .data-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}
.row-correct { background: rgba(0, 230, 118, 0.04); }
.row-wrong { background: rgba(255, 83, 112, 0.03); }
.row-me { background: rgba(0, 230, 118, 0.08); }
.rank { color: var(--accent); width: 50px; }
.points { color: var(--accent); font-weight: 600; }
.flag-cell { font-size: 0.85em; color: var(--warn); }
.ach { font-size: 1.1em; margin-right: 4px; }

/* ----- Stats ----- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin: 16px 0 32px;
}
.stat {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 6px;
}
.stat-num {
  font-family: var(--mono);
  font-size: 1.6em;
  color: var(--accent);
}
.stat-label {
  font-size: 0.85em;
  color: var(--text-dim);
  margin-top: 4px;
}
.stat-bar {
  height: 6px;
  background: var(--bg);
  margin-top: 10px;
  border-radius: 3px;
  overflow: hidden;
}
.stat-bar-fill {
  height: 100%;
  background: var(--accent);
}

/* ----- Forms ----- */
.stack-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 600px;
}
.stack-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.85em;
}
.stack-form .md-editor {
  font-family: var(--mono);
  min-height: 300px;
}
.inline-form { display: flex; gap: 8px; margin: 12px 0; flex-wrap: wrap; align-items: center; }
.inline-form input[type=text], .inline-form input[type=number] { flex: 1; min-width: 140px; }
.checkbox-inline {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  color: var(--text-dim);
  font-size: 0.85em;
}

.profile-info {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 8px 16px;
  font-family: var(--mono);
  font-size: 0.9em;
}
.profile-info dt { color: var(--text-dim); }
.profile-info dd { margin: 0; }

.ach-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.ach-list li {
  background: var(--bg-card);
  padding: 8px 12px;
  border-left: 3px solid var(--accent);
  border-radius: 3px;
}

.error-page {
  text-align: center;
  padding: 80px 0;
}
.error-page h1 {
  font-size: 5em;
  color: var(--accent);
  margin: 0;
}

/* ----- Footer ----- */
.footer {
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  color: var(--text-dim);
  font-size: 0.8em;
}
.footer-tip { opacity: 0.5; }

/* ----- Mobile ----- */
@media (max-width: 600px) {
  .navbar { padding: 10px 12px; gap: 10px; }
  .nav-links { gap: 10px; font-size: 0.85em; }
  .container { padding: 16px 12px 60px; }
  .login-box { padding: 24px; }
  .stat-grid { grid-template-columns: 1fr; }
  .data-table, .leaderboard, .submission-table {
    display: block;
    overflow-x: auto;
  }
  .profile-info { grid-template-columns: 1fr; }
  .profile-info dt { color: var(--accent); margin-top: 8px; }
}