/* Structural styles shared by every theme. Themes (see /css/themes/*.css)
   only define color tokens: --bg, --bg-panel, --text, --primary(-dim/-rgb),
   --accent(-dim/-rgb), --accent2(-rgb), --danger(-rgb), and the three
   --border-glow-* shadows built from them. */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Consolas', 'Courier New', ui-monospace, monospace;
}

body {
  position: relative;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(var(--accent-rgb), 0.07), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(var(--primary-rgb), 0.08), transparent 40%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.02),
    rgba(255, 255, 255, 0.02) 1px,
    transparent 1px,
    transparent 3px
  );
  z-index: 1000;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent2); text-shadow: 0 0 6px rgba(var(--accent2-rgb), 0.5); }

.wrapper {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

header.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--primary-dim);
  padding-bottom: 14px;
  margin-bottom: 28px;
}

header.topbar .brand {
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--primary);
  text-shadow: 0 0 8px var(--primary), 0 0 18px rgba(var(--primary-rgb), 0.4);
  letter-spacing: 2px;
}

header.topbar .brand::before { content: "// "; color: var(--accent); }

nav.navlinks a {
  margin-left: 18px;
  color: var(--text);
  border: 1px solid transparent;
  padding: 4px 10px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
nav.navlinks a:hover {
  border-color: var(--accent);
  box-shadow: var(--border-glow-accent);
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--primary-dim);
  border-radius: 4px;
  box-shadow: var(--border-glow-primary);
  padding: 22px 24px;
  margin-bottom: 24px;
}

.panel.purple {
  border-color: var(--accent-dim);
  box-shadow: var(--border-glow-accent);
}

.panel.danger {
  border-color: var(--danger);
  box-shadow: var(--border-glow-danger);
}

.text-danger {
  color: var(--danger);
  text-shadow: 0 0 6px rgba(var(--danger-rgb), 0.4);
}

h1, h2, h3 {
  color: var(--primary);
  text-shadow: 0 0 6px rgba(var(--primary-rgb), 0.5);
  letter-spacing: 1px;
}

h1::before, h2::before { content: "// "; color: var(--accent); text-shadow: none; }

.subtitle { color: var(--accent); opacity: 0.85; margin-top: -8px; }

label {
  display: block;
  margin: 14px 0 6px;
  color: var(--accent);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 1px;
}

input[type="text"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  background: #010202;
  border: 1px solid var(--primary-dim);
  color: var(--primary);
  font-family: inherit;
  padding: 10px 12px;
  border-radius: 3px;
  font-size: 1rem;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--border-glow-primary);
}

textarea { resize: vertical; min-height: 80px; }

.checkbox-row { display: flex; align-items: center; gap: 8px; margin: 14px 0; }
.checkbox-row input { width: auto; }
.checkbox-row label { margin: 0; text-transform: none; color: var(--text); }

button, .btn {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-family: inherit;
  padding: 10px 20px;
  margin-top: 16px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-radius: 3px;
  transition: all 0.15s ease;
}
button:hover, .btn:hover {
  background: var(--primary);
  color: #000;
  box-shadow: var(--border-glow-primary);
}

.btn.purple { border-color: var(--accent); color: var(--accent); }
.btn.purple:hover { background: var(--accent); color: #000; box-shadow: var(--border-glow-accent); }

.btn.danger { border-color: var(--danger); color: var(--danger); }
.btn.danger:hover { background: var(--danger); color: #000; box-shadow: var(--border-glow-danger); }

.btn.small { padding: 4px 10px; font-size: 0.75rem; margin-top: 0; }

.alert {
  padding: 12px 16px;
  border-radius: 3px;
  margin-bottom: 18px;
  font-size: 0.95rem;
}
.alert.error {
  border: 1px solid var(--danger);
  color: var(--danger);
  box-shadow: var(--border-glow-danger);
}
.alert.success {
  border: 1px solid var(--primary);
  color: var(--primary);
  box-shadow: var(--border-glow-primary);
}

table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid rgba(var(--primary-rgb), 0.2);
}
th { color: var(--accent); text-transform: uppercase; font-size: 0.8rem; letter-spacing: 1px; }
tr:hover td { background: rgba(var(--accent-rgb), 0.05); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.badge.solved { border: 1px solid var(--primary); color: var(--primary); }
.badge.locked { border: 1px solid #555; color: #777; }
.badge.open { border: 1px solid var(--accent); color: var(--accent); }
.badge.pending { border: 1px solid var(--danger); color: var(--danger); }
.badge.approved { border: 1px solid var(--primary); color: var(--primary); }
.badge.admin { border: 1px solid var(--accent2); color: var(--accent2); }

.challenge-list { list-style: none; padding: 0; margin: 0; }
.challenge-list li { margin-bottom: 12px; }

.challenge-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--primary-dim);
  border-radius: 4px;
  padding: 14px 18px;
}
a.challenge-row {
  color: inherit;
  text-decoration: none;
  transition: all 0.15s ease;
}
a.challenge-row:hover {
  border-color: var(--primary);
  box-shadow: var(--border-glow-primary);
  color: inherit;
  text-shadow: none;
}
.challenge-row.locked { opacity: 0.5; border-color: #444; }

.challenge-list .title { font-size: 1.05rem; color: var(--primary); }
.challenge-list .points { color: var(--accent); font-size: 0.85rem; }

.challenge-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
}

.challenge-card {
  display: block;
  background: var(--bg-panel);
  border: 1px solid var(--primary-dim);
  border-radius: 4px;
  padding: 18px 20px;
  color: var(--text);
  transition: all 0.15s ease;
}
.challenge-card:hover {
  border-color: var(--primary);
  box-shadow: var(--border-glow-primary);
  color: var(--text);
  text-shadow: none;
}

.challenge-card-title {
  color: var(--primary);
  font-size: 1.1rem;
  text-shadow: 0 0 6px rgba(var(--primary-rgb), 0.4);
  margin-bottom: 6px;
}
.challenge-card-desc { min-height: 1.2em; margin-bottom: 14px; font-size: 0.85rem; }
.challenge-card-score {
  font-size: 2rem;
  color: var(--accent);
  text-shadow: 0 0 6px rgba(var(--accent-rgb), 0.4);
}
.challenge-card-footer { margin-top: 14px; }

.score-hero {
  text-align: center;
  padding: 10px 0 20px;
}
.score-hero .score-value {
  font-size: 3rem;
  color: var(--primary);
  text-shadow: 0 0 12px var(--primary), 0 0 30px rgba(var(--primary-rgb), 0.5);
}

.hint-box {
  border: 1px dashed var(--accent-dim);
  border-radius: 4px;
  padding: 14px 16px;
  margin: 16px 0;
  background: rgba(var(--accent-rgb), 0.05);
}
.hint-box form { margin: 0; }
.hint-box button { margin-top: 0; }

.hint-prompt {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.answer-reveal {
  border: 1px solid var(--accent);
  box-shadow: var(--border-glow-accent);
  padding: 16px 18px;
  border-radius: 4px;
  margin-top: 18px;
  white-space: pre-wrap;
}

.flicker {
  animation: flicker 3s infinite;
}
@keyframes flicker {
  0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% { opacity: 1; }
  20%, 22%, 24%, 55% { opacity: 0.7; }
}

.muted { color: #7a8a7a; font-size: 0.85rem; }

.rank {
  color: var(--accent);
  font-weight: bold;
  width: 40px;
}

.form-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

.drag-list { list-style: none; padding: 0; margin: 0; }
.drag-item {
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--primary-dim);
  border-radius: 4px;
  padding: 12px 16px;
  margin-bottom: 10px;
  background: var(--bg-panel);
  cursor: grab;
}
.drag-item.dragging { opacity: 0.4; border-style: dashed; }
.drag-handle { color: var(--accent); font-size: 1.2rem; user-select: none; line-height: 1; }
.drag-item-body { flex: 1; min-width: 0; }
.drag-item-title { color: var(--primary); }
.drag-item-actions { display: flex; gap: 8px; flex-shrink: 0; }
.reorder-status { font-size: 0.8rem; color: var(--primary); margin-left: 4px; }

.theme-swatches { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; }
.theme-option {
  display: block;
  width: 220px;
  border: 1px solid var(--primary-dim);
  border-radius: 4px;
  padding: 14px 16px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.theme-option:hover { border-color: var(--primary); box-shadow: var(--border-glow-primary); }
.theme-option.selected { border-color: var(--primary); box-shadow: var(--border-glow-primary); }
.theme-option input { width: auto; margin-right: 8px; }
.theme-option-name { color: var(--primary); font-weight: bold; }
.theme-option-desc { margin-top: 6px; }
.theme-preview-strip { display: flex; gap: 6px; margin-top: 10px; }
.theme-preview-swatch { width: 22px; height: 22px; border-radius: 3px; border: 1px solid rgba(255,255,255,0.15); }