:root{
  --bg: #121803;
  --panel: rgba(198,217,46,0.06);
  --panel-strong: rgba(198,217,46,0.12);
  --text: #e6f0c6;
  --muted: #a8b575;
  --brand: #2A2D08; /* Main green */
  --brand-2: #C6D92E; /* Lighter accent green */
  --brand-muted: #8fb522; /* Toned down green for challenge page */
  --accent: #C6D92E; /* Bright CTF green */
  --danger: #ff4757;
  --success: #2A2D08;
  --warning: #C6D92E;
  --chip: rgba(198,217,46,0.08);
  --card-glow: 0 10px 30px rgba(198,217,46,0.15);
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 8px 24px rgba(0,0,0,0.35);
}

*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Noto Sans, Ubuntu, Cantarell, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 15% -10%, #1a1f04 0%, transparent 60%),
              radial-gradient(1200px 600px at 85% 110%, #242908 0%, transparent 60%),
              radial-gradient(800px 400px at 50% 50%, rgba(198,217,46,0.05) 0%, transparent 70%),
              var(--bg);
  background-attachment: fixed;
  background-repeat: no-repeat;
  color:var(--text);
  letter-spacing: .2px;
  min-height: 100vh;
}

header{
  position: sticky; top:0; z-index: 50; backdrop-filter: blur(10px);
  background: linear-gradient(180deg, rgba(5,10,20,0.75), rgba(5,10,20,0.35));
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.container{max-width:1200px; margin:0 auto; padding: 16px;}
.hero{display:flex; align-items:center; gap:16px; padding:10px 0 14px}
.logo{
  width:44px; 
  height:44px; 
  border-radius:12px; 
  background: var(--brand-2); 
  box-shadow: var(--card-glow); 
  position:relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  color: var(--bg);
  letter-spacing: -0.5px;
  z-index: 2;
}
.logo::after{
  content:""; 
  position:absolute; 
  inset:3px; 
  border-radius:10px; 
  background: conic-gradient(from 180deg at 50% 50%, transparent, rgba(255,255,255,0.2), transparent); 
  filter: blur(6px);
  z-index: -1;
}
.title{font-size: clamp(22px, 4vw, 30px); font-weight: 800; letter-spacing: .3px}
.subtitle{color:var(--muted); font-size: 13px}

.nav-tabs {
  display: flex;
  gap: 4px;
  margin-top: 16px;
  background: var(--panel);
  border-radius: var(--radius-sm);
  padding: 4px;
  border: 1px solid rgba(255,255,255,0.08);
}

.nav-tab {
  flex: 1;
  padding: 12px 20px;
  text-decoration: none;
  color: var(--muted);
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-align: center;
  transition: all 0.2s ease;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.nav-tab:hover {
  color: var(--text);
  background: rgba(255,255,255,0.05);
}

.nav-tab.active {
  background: var(--brand-2);
  color: var(--bg);
  box-shadow: var(--card-glow);
}

@media(max-width: 640px) {
  .nav-tabs {
    margin-top: 12px;
  }
  
  .nav-tab {
    font-size: 13px;
    padding: 10px 16px;
  }
}

.toolbar{display:grid; grid-template-columns: 1fr; gap:12px; padding:12px 0 16px}

.search-field {
  position: relative;
  display: flex;
  align-items: center;
}

.search-field .input {
  padding-right: 44px; /* Make room for the reset button */
}

.search-reset {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 20px;
  font-weight: 300;
  cursor: pointer;
  border-radius: 50%;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
}

.search-reset:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

.search-reset:active {
  transform: translateY(-50%) scale(0.95);
}

.search-field:focus-within .search-reset {
  opacity: 0.6;
  pointer-events: auto;
}

.search-field .input:not(:placeholder-shown) ~ .search-reset {
  opacity: 1;
  pointer-events: auto;
}

.search-field .search-reset:hover {
  opacity: 1 !important;
}

.field{position:relative}
.input, select{
  width:100%; border:1px solid rgba(255,255,255,0.1); background: var(--panel); color:var(--text);
  padding: 12px 14px; border-radius: var(--radius-sm); outline: none;
  transition:.2s border,.2s box-shadow,.2s background;
}
.input:focus, select:focus{border-color: var(--brand); box-shadow: 0 0 0 4px rgba(13,110,253,0.15)}
.range{width:100%}
.btn{display:inline-flex; align-items:center; gap:8px; border:none; background: var(--brand-2); color: var(--bg); padding: 10px 14px; border-radius: 999px; cursor:pointer; box-shadow: var(--card-glow); font-weight:600; text-decoration:none}
.btn.primary{background: var(--brand-2); color: var(--bg); box-shadow: var(--card-glow)}
.btn.secondary{background: var(--panel-strong); color:var(--text); box-shadow:none; border:1px solid rgba(255,255,255,0.1)}
.btn:hover{opacity:0.9; transform:translateY(-1px)}
.btn:active{transform:translateY(0)}

.grid{display:grid; grid-template-columns: 1fr; gap:14px}
@media(min-width:720px){.grid{grid-template-columns: 1fr 1fr}}
@media(min-width:1040px){.grid{grid-template-columns: 1fr 1fr 1fr}}

.challenge-section{margin-bottom: 40px}
.section-title{
  font-size: 24px; font-weight: 800; margin: 0 0 20px 0; 
  color: var(--brand-muted); letter-spacing: 0.3px;
  border-bottom: 2px solid var(--panel-strong);
  padding-bottom: 8px;
}

.card{
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow:hidden;
  position:relative;
  transition: all 0.2s ease;
}

.challenge-card:hover {
  transform: translateY(-2px);
  border-color: var(--brand-2);
  box-shadow: 0 8px 32px rgba(198,217,46,0.25);
}
.card::before{ /* cyber edge */
  content:""; position:absolute; inset:0; border-radius: inherit; padding:1px;
  background: rgba(198,217,46,0.15);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; 
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude; 
  opacity:.3;
  pointer-events:none;
}
.card-head{display:flex; align-items:flex-start; justify-content:space-between; gap:10px; padding:14px 14px 6px}

.card-indicators {
  display: flex;
  gap: 8px;
  align-items: center;
}

.writeup-indicator {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: rgba(198,217,46,0.15);
  border: 1px solid rgba(198,217,46,0.4);
  backdrop-filter: blur(10px);
  position: relative;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: rgba(198,217,46,0.9);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

.writeup-indicator::before {
  content: 'W';
}

.hint-indicator {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255,215,107,0.15);
  border: 1px solid rgba(255,215,107,0.4);
  backdrop-filter: blur(10px);
  position: relative;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: rgba(255,215,107,0.9);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

.hint-indicator::before {
  content: 'H';
}

.challenge-card:hover .writeup-indicator {
  background: rgba(198,217,46,0.25);
  border-color: rgba(198,217,46,0.6);
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(198,217,46,0.3);
}

.challenge-card:hover .hint-indicator {
  background: rgba(255,215,107,0.25);
  border-color: rgba(255,215,107,0.6);
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(255,215,107,0.3);
}
.badge{display:inline-flex; align-items:center; gap:8px; background: var(--chip); border:1px solid rgba(255,255,255,0.08); color: var(--brand-2); padding:6px 10px; border-radius: 999px; font-weight:700; font-size:12px}
.pts{color:var(--warning); font-weight:800; font-size: 12px}
.card-title{padding: 0 14px; font-weight: 800; font-size: 18px; line-height:1.3}
.card-desc{padding: 8px 14px 0; color:var(--muted); font-size: 14px}
.chips{padding: 10px 14px 14px; display:flex; flex-wrap:wrap; gap:8px}
.chip{background: var(--chip); border:1px solid rgba(255,255,255,0.08); color: #cfe3ff; padding:6px 10px; border-radius: 999px; font-size:12px}

.details{padding: 0 14px 14px; display:none; animation: fade .25s ease-out}
.details.open{display:block}
.section{margin-top:10px; padding: 10px; background: var(--panel); border:1px solid rgba(255,255,255,0.06); border-radius: 12px}
.section h4{margin:0 0 8px; font-size: 13px; letter-spacing:.4px; text-transform: uppercase; color:#bcd2ff}
.list{margin:0; padding-left:18px}

@keyframes fade{from{opacity:0; transform: translateY(-4px)} to{opacity:1; transform:none}}

.footer{color:var(--muted); text-align:center; font-size:12px; padding: 26px 0 40px}

dialog{border:none; border-radius: 16px; padding:0; background: linear-gradient(180deg, rgba(11,15,26,0.95), rgba(11,15,26,0.92)); color:var(--text); box-shadow: var(--shadow); width:min(680px, 92vw); max-height: 80vh; overflow-y: auto; backdrop-filter: blur(10px)}
dialog::backdrop{background: rgba(0,0,0,0.7)}
.modal-head{display:flex; align-items:center; justify-content:space-between; gap:8px; padding:14px; border-bottom: 1px solid rgba(255,255,255,0.08)}
.modal-body{padding:14px}
.modal-section{margin-bottom: 16px}
.modal-section h4{margin:0 0 8px; font-size: 13px; letter-spacing:.4px; text-transform: uppercase; color:#bcd2ff}
.kbd{font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; background: rgba(0,0,0,0.35); padding: 6px 8px; border-radius: 8px; border: 1px dashed rgba(255,255,255,0.18); display:inline-block}
.muted{color:var(--muted)}
.empty{padding:24px; text-align:center; color:var(--muted)}

.pillbar{display:flex; gap:8px; flex-wrap:wrap}
.pill{display:inline-flex; align-items:center; gap:6px; padding:6px 10px; background: var(--panel); border:1px solid rgba(255,255,255,0.08); border-radius:999px; font-size:12px}
.pill .x{opacity:.75; cursor:pointer}

.toggle{appearance:none; width:44px; height:26px; border-radius:999px; position:relative; background: var(--panel); border:1px solid rgba(255,255,255,0.12); outline:none; cursor:pointer}
.toggle::after{content:""; position:absolute; width:20px; height:20px; border-radius:50%; top:2px; left:2px; background: #fff; transition:.2s}
.toggle:checked{background: var(--brand-2)}
.toggle:checked::after{left:22px}

.util{display:flex; align-items:center; gap:10px; justify-content:space-between; margin-top:6px}
.left-util{display:flex; align-items:center; gap:12px; flex-wrap:wrap}

/* Challenge Page Styles */
#challenge-page {
  display: none;
  min-height: 60vh;
  padding-top: 20px;
}

.challenge-header {
  margin-bottom: 30px;
}

.challenge-meta {
  margin-top: 20px;
}

.challenge-title {
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 800;
  margin: 0 0 16px 0;
  letter-spacing: 0.3px;
  color: var(--brand-muted);
}

.challenge-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.category-badge {
  background: var(--brand-2);
  color: var(--bg);
  font-weight: 700;
}

.points-badge {
  background: var(--warning);
  color: var(--bg);
  font-weight: 800;
}

.difficulty-badge {
  background: var(--panel-strong);
  color: var(--accent);
  border: 1px solid var(--accent);
  font-weight: 600;
}

.challenge-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  background: var(--panel);
  border-radius: var(--radius-sm);
  padding: 4px;
  border: 1px solid rgba(255,255,255,0.08);
}

.tab-btn {
  flex: 1;
  padding: 12px 20px;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
  font-size: 14px;
}

.tab-btn:hover {
  color: var(--text);
  background: rgba(255,255,255,0.05);
}

.tab-btn.active {
  background: var(--brand-2);
  color: var(--bg);
  box-shadow: var(--card-glow);
}

.tab-content {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  position: relative;
}

.tab-content::before {
  content:""; 
  position:absolute; 
  inset:0; 
  border-radius: inherit; 
  padding:1px;
  background: rgba(198,217,46,0.1);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; 
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude; 
  opacity:.2;
  pointer-events:none;
}

.tab-section {
  margin-bottom: 24px;
}

.tab-section:last-child {
  margin-bottom: 0;
}

.tab-section h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 16px 0;
  color: var(--brand-muted);
  letter-spacing: 0.2px;
}

.description-content {
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
}

.description-content img {
  max-width: 100%;
  height: auto;
  margin: 16px 0;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: var(--shadow);
}

.file-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.file-list li {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  padding: 12px 16px;
  transition: all 0.2s ease;
}

.file-list li:hover {
  background: var(--panel-strong);
  transform: translateX(4px);
}

.file-list a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.file-list a::before {
  content: "📁";
  font-size: 16px;
}

.connection-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.connection-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.connection-url {
  background: rgba(0,0,0,0.35);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(255,255,255,0.2);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color: var(--accent);
  font-size: 14px;
  word-break: break-all;
}

.external-link-icon {
  width: 14px;
  height: 14px;
  position: relative;
  display: inline-block;
  flex-shrink: 0;
}

.external-link-icon::before {
  content: '';
  position: absolute;
  width: 10px;
  height: 10px;
  border: 2px solid currentColor;
  border-bottom: none;
  border-left: none;
  top: 0;
  right: 0;
}

.external-link-icon::after {
  content: '';
  position: absolute;
  width: 6px;
  height: 2px;
  background: currentColor;
  bottom: 2px;
  left: 0;
  box-shadow: 
    0 -2px 0 currentColor,
    0 -4px 0 currentColor,
    2px -2px 0 currentColor,
    4px 0 0 currentColor;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
}

.empty-state h3 {
  color: var(--muted) !important;
  margin-bottom: 8px !important;
}

.hints-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hints-notice {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 16px;
}

.hints-notice p {
  margin: 0;
  color: var(--brand-2);
  font-size: 14px;
  font-weight: 600;
}

.hint-item {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.hint-header {
  background: var(--brand-2);
  padding: 10px 16px;
  color: var(--bg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hint-number {
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.3px;
}

.hint-status {
  font-size: 12px;
  opacity: 0.9;
  font-weight: 600;
}

.hint-content {
  padding: 16px;
  color: var(--text);
  line-height: 1.5;
  position: relative;
  min-height: 60px;
}

.hint-content.spoiler {
  cursor: pointer;
  user-select: none;
}

.spoiler-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, 
    rgba(0,0,0,0.9) 0%, 
    rgba(20,20,20,0.95) 25%, 
    rgba(0,0,0,0.9) 50%, 
    rgba(20,20,20,0.95) 75%, 
    rgba(0,0,0,0.9) 100%);
  background-size: 20px 20px;
  animation: spoilerPattern 2s linear infinite;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: opacity 0.3s ease;
}

.spoiler-text {
  color: var(--accent);
  font-weight: 700;
  text-shadow: 0 0 10px rgba(127,255,212,0.5);
  font-size: 14px;
  letter-spacing: 0.5px;
}

.spoiler-timer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: rgba(255,255,255,0.1);
  border-radius: 0 0 8px 8px;
}

.timer-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--success), var(--warning), var(--danger));
  border-radius: inherit;
  width: 100%;
  transform-origin: left;
}

.hint-text {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.hint-content.revealed .hint-text {
  opacity: 1;
}

.hint-content.hiding {
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

@keyframes spoilerPattern {
  0% { background-position: 0 0; }
  100% { background-position: 20px 20px; }
}

@keyframes countdown {
  from { transform: scaleX(1); }
  to { transform: scaleX(0); }
}

.writeup-placeholder {
  text-align: center;
  padding: 40px 20px;
}

.contribute-section {
  margin-top: 32px;
  padding: 24px;
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
}

.contribute-section h4 {
  margin: 0 0 12px 0;
  color: var(--brand-2);
  font-size: 18px;
}

.contribute-section p {
  margin: 0 0 20px 0;
  color: var(--muted);
}

.writeups-intro {
  color: var(--muted);
  margin-bottom: 24px;
  font-style: italic;
}

.writeups-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.writeup-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  padding: 20px;
  position: relative;
  transition: all 0.2s ease;
}

.writeup-item:hover {
  border-color: var(--brand-2);
  box-shadow: 0 4px 20px rgba(198,217,46,0.15);
  transform: translateY(-2px);
}

.writeup-item::before {
  content:""; 
  position:absolute; 
  inset:0; 
  border-radius: inherit; 
  padding:1px;
  background: rgba(198,217,46,0.08);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; 
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude; 
  opacity:.3;
  pointer-events:none;
}

.writeup-header {
  margin-bottom: 16px;
}

.writeup-title {
  margin: 0 0 8px 0;
  font-size: 18px;
  font-weight: 700;
}

.writeup-title a {
  color: var(--brand-2);
  text-decoration: none;
  transition: color 0.2s ease;
}

.writeup-title a:hover {
  color: var(--accent);
}

.writeup-meta {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.writeup-author {
  color: var(--text);
  font-weight: 600;
}

.writeup-platform {
  background: var(--chip);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--brand-2);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

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

@media (max-width: 640px) {
  .writeup-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .writeup-actions {
    justify-content: stretch;
  }
  
  .writeup-actions .btn {
    flex: 1;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .challenge-badges {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .challenge-tabs {
    flex-direction: column;
    gap: 0;
  }
  
  .tab-btn {
    border-radius: 0;
    text-align: left;
  }
  
  .tab-btn:first-child {
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  }
  
  .tab-btn:last-child {
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  }
  
  .connection-actions {
    flex-direction: column;
    align-items: stretch;
  }
  
  .connection-actions .btn {
    justify-content: center;
  }
}

/* Recordings Page Styles */
.recordings-hero {
  text-align: center;
  margin-bottom: 40px;
  padding: 20px 0;
}

.recordings-title {
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 800;
  margin: 0 0 12px 0;
  color: var(--brand-muted);
  letter-spacing: 0.3px;
}

.recordings-subtitle {
  color: var(--muted);
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.5;
}

.day-section {
  margin-bottom: 50px;
}

.day-title {
  font-size: 28px;
  font-weight: 800;
  margin: 0 0 24px 0;
  color: var(--brand-2);
  letter-spacing: 0.3px;
  text-align: center;
  position: relative;
}

.day-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--brand-2);
  border-radius: 2px;
}

.recordings-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media(min-width: 768px) {
  .recordings-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media(min-width: 1200px) {
  .recordings-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.recording-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  transition: all 0.3s ease;
  cursor: pointer;
}

.recording-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-2);
  box-shadow: 0 12px 40px rgba(198,217,46,0.25);
}

.recording-card::before {
  content:""; 
  position:absolute; 
  inset:0; 
  border-radius: inherit; 
  padding:1px;
  background: rgba(198,217,46,0.15);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; 
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude; 
  opacity:.3;
  pointer-events:none;
}

.recording-header {
  padding: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(135deg, var(--panel), rgba(198,217,46,0.05));
}

.recording-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--brand-2);
  color: var(--bg);
  border-radius: 50%;
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 12px;
}

.recording-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px 0;
  color: var(--text);
  line-height: 1.3;
}

.recording-presenter {
  color: var(--brand-2);
  font-weight: 600;
  font-size: 14px;
}

.recording-body {
  padding: 20px;
}

.play-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: var(--brand-2);
  border-radius: 50%;
  margin: 0 auto;
  position: relative;
  box-shadow: var(--card-glow);
  transition: all 0.3s ease;
}

.recording-card:hover .play-icon {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(198,217,46,0.4);
}

.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 16px solid var(--bg);
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  margin-left: 4px;
}

.back-to-challenges {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 30px;
  padding: 10px 16px;
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: all 0.2s ease;
}

.back-to-challenges:hover {
  background: var(--panel-strong);
  transform: translateX(-2px);
}