:root {
  --bg: #0b1120;
  --bg-2: #0a1429;
  --card: rgba(16, 24, 40, 0.7);
  --text: #e6f7ff;
  --muted: #a8c3cf;
  --neon: #00e5ff;
  --neon-2: #67e8f9;
  --border: rgba(0, 229, 255, 0.22);
  --accent: #10b981;
  --danger: #ef4444;
  --radius: 16px;
  --shadow: 0 10px 40px rgba(0,0,0,.45);
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: radial-gradient(1200px 800px at 20% -10%, rgba(0,229,255,.08), transparent 60%), var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
}

.site-header {
  padding: 32px 20px 10px;
  text-align: center;
}
.site-header h1 {
  margin: 0 0 6px;
  font-size: 28px;
  letter-spacing: .5px;
  text-shadow: 0 0 16px rgba(0,229,255,.18);
}
.tagline { 
  margin: 0 auto; 
  max-width: 780px; 
  color: var(--muted); 
}

.container { 
  max-width: 1080px; 
  margin: 20px auto 60px; 
  padding: 0 16px; 
}

.controls {
  background: linear-gradient(180deg, rgba(103,232,249,.06), rgba(103,232,249,.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.control-row { 
  display: grid; 
  grid-template-columns: 1fr auto; 
  gap: 12px; 
}

.search-group { 
  display: flex; 
  gap: 8px; 
  align-items: center; 
}

.search-group input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text);
  outline: none;
  box-shadow: inset 0 0 0 1px rgba(0,229,255,.06);
}
.search-group input:focus { box-shadow: 0 0 0 2px rgba(0,229,255,.25); }
.ghost {
  padding: 10px 12px;
  border-radius: 10px;
  background: transparent;
  color: var(--neon-2);
  border: 1px dashed var(--border);
  cursor: pointer;
}
.ghost:hover { border-style: solid; }

.filters { 
  display: flex; 
  gap: 10px;
  align-items: center; 
  flex-wrap: wrap; 
}

.filters label {
  display: flex; 
  gap: 8px; 
  align-items: center;
  background: rgba(0,229,255,.06);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 12px;
}

.filters select {
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  outline: none;
}

.action-row { 
  display: flex; 
  gap: 10px; 
  align-items: center; 
  margin-top: 10px; 
  flex-wrap: wrap; 
}

.tiny-note { 
  color: var(--muted); 
  font-size: 12px; 
  margin-left: 0; 
}

.stats { 
  margin: 14px 4px; 
  color: var(--muted); 
}

.table-wrap {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

table { width: 100%; border-collapse: collapse; }
thead th {
  text-align: left;
  background: rgba(0,229,255,.08);
  color: #dff9ff;
  border-bottom: 1px solid var(--border);
  padding: 12px;
  font-weight: 700;
}
tbody td {
  padding: 12px;
  border-bottom: 1px dashed rgba(0,229,255,.15);
}
tbody tr:hover { background: rgba(0,229,255,.06); cursor: pointer; }

.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .2px;
  border: 1px solid var(--border);
  background: rgba(0,229,255,.08);
}
.badge.irregular { background: rgba(239, 68, 68, .18); border-color: rgba(239,68,68,.35); }
.badge.regular   { background: rgba(16,185,129,.18); border-color: rgba(16,185,129,.35); }

.highlight { outline: 2px solid rgba(0,229,255,.25); border-radius: 8px; }

.pagination {
  display: flex; 
  gap: 12px; 
  align-items: center; 
  justify-content: center;
  margin: 14px 0 0;
}
.pagination .perpage { 
  margin-left: 10px; 
  display: inline-flex; 
  gap: 8px;
  align-items: center; 
}

#pageInfo { color: var(--muted); }

.site-footer {
  text-align: center; color: var(--muted);
  padding: 30px 0 50px;
  font-size: 14px;
}

@media (max-width: 720px) {
  .control-row { grid-template-columns: 1fr; }
  thead th:nth-child(5), tbody td:nth-child(5) { display: none; }
}

.site-footer {
  padding: 32px 16px;
  background: #0b1120;
  color: var(--muted, #a8c3cf);
  font-size: 14px;
  text-align: center;
}

.footer-container {
  max-width: 800px;
  margin: 0 auto;
}

.footer-brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--text, #e6f7ff);
  margin-bottom: 12px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.footer-links a {
  color: var(--text, #e6f7ff);
  text-decoration: none;
}
.footer-links a:hover {
  text-decoration: underline;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 16px;
}
.footer-social a {
  color: var(--text, #e6f7ff);
  font-size: 18px;
  transition: color 0.2s;
}
.footer-social a:hover {
  color: var(--neon-2, #67e8f9);
}

.footer-divider {
  border: none;
  border-top: 1px solid var(--border, rgba(0,229,255,.22));
  margin: 16px auto;
  max-width: 480px;
}

.footer-bottom {
  margin-top: 8px;
  color: var(--muted, #a8c3cf);
  font-size: 13px;
}

.footer-links a.brand-link {
  font-weight: 600;
  color: var(--neon, #00e5ff);
  position: relative;
  transition: color .25s ease;
}

.footer-links a.brand-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 2px;
  background: currentColor;
  transition: width .3s ease;
}

.footer-links a.brand-link:hover {
  color: #67e8f9;
}

.footer-links a.brand-link:hover::after {
  width: 100%;
}


.pagination{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  margin:16px 0 0;
  flex-wrap:wrap;
}

.pagination button{
  padding:10px 14px;
  border-radius:999px;
  background:transparent;
  color:var(--text, #e6f7ff);
  border:1px solid var(--border, rgba(0,229,255,.22));
  box-shadow: 0 0 0 1px rgba(0,229,255,.05) inset;
  cursor:pointer;
  transition:transform .12s ease, box-shadow .15s ease, border-color .15s ease, background .15s ease;
  backdrop-filter:saturate(120%);
}
.pagination button:hover{
  transform:translateY(-1px);
  background:rgba(0,229,255,.06);
  border-color:rgba(0,229,255,.4);
  box-shadow:0 6px 20px rgba(0,229,255,.12);
}
.pagination button:focus-visible{
  outline:none;
  box-shadow:0 0 0 2px rgba(0,229,255,.28);
}
.pagination button:disabled{
  opacity:.5;
  cursor:not-allowed;
  transform:none;
  background:transparent;
  box-shadow:none;
}

#pageInfo{
  padding:8px 12px;
  border-radius:999px;
  background:rgba(103,232,249,.08);
  border:1px solid var(--border, rgba(0,229,255,.22));
  color:var(--muted, #a8c3cf);
  font-weight:600;
  letter-spacing:.2px;
}

.pagination .perpage{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--muted, #a8c3cf);
  border:1px dashed var(--border, rgba(0,229,255,.22));
  padding:6px 10px;
  border-radius:12px;
}

#perPage{
  appearance:none;
  -webkit-appearance:none;
  -moz-appearance:none;
  background:var(--bg-2, #0a1429);
  color:var(--text, #e6f7ff);
  border:1px solid var(--border, rgba(0,229,255,.22));
  border-radius:10px;
  padding:8px 28px 8px 10px;
  line-height:1;
  cursor:pointer;
  background-image:
    url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2367E8F9' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 8px center;
  background-size:12px 8px;
}
#perPage:focus{
  outline:none;
  box-shadow:0 0 0 2px rgba(0,229,255,.28);
  border-color:rgba(0,229,255,.45);
}

@media (max-width: 560px){
  .pagination{ gap:10px; }
  #pageInfo{ padding:6px 10px; }
  .pagination button{ padding:8px 12px; }
  .pagination .perpage{ padding:6px 8px; }
  #perPage{ padding:6px 26px 6px 8px; }
}

.usage-title {
  text-align: center;
  margin: 20px 0 14px;
  font-size: 22px;
}

.usage-cards .cards-grid {
  max-width: 900px;      
  margin: 0 auto;       
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.usage-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(16,24,40,.6);
  padding: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
  transform: translateY(8px);
  opacity: 0;
  transition: .45s ease;
}
.usage-card h3 { margin-top: 0; }
.usage-card .mini { margin-left: 18px; }
.usage-card .tip { color: var(--muted); font-size: 13px; }

.usage-card.reveal { transform: none; opacity: 1; }

.usage-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}
.usage-table th, .usage-table td {
  border: 1px solid var(--border);
  padding: 6px 8px;
  text-align: center;
}
.usage-table th { background: rgba(0,229,255,.08); }

@media (max-width:1024px){
  .usage-cards .cards-grid {
    grid-template-columns: 1fr 1fr;
    max-width: 100%; 
  }
}
@media (max-width:560px){
  .usage-cards .cards-grid {
    grid-template-columns: 1fr;
    max-width: 100%;
  }
}

.card-accent.info {
  background: linear-gradient(90deg, rgba(0,229,255,.9), transparent 60%);
}

.quiz-link {
  margin: 40px auto;
  display: flex;
  justify-content: center;
}

.quiz-card {
  max-width: 600px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  background: rgba(16,24,40,.65);
  box-shadow: 0 8px 24px rgba(0,229,255,.12);
  animation: floatUp .45s ease both;
}

.quiz-card h2 {
  margin: 0 0 8px;
  font-size: 22px;
  color: var(--neon, #00e5ff);
}

.quiz-card p {
  margin: 0 0 18px;
  color: var(--muted);
}

.quiz-btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 14px;
  text-decoration: none;
  background: linear-gradient(90deg, rgba(0,229,255,.15), rgba(103,232,249,.1));
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 500;
  transition: all .25s ease, transform .08s ease;
  box-shadow: 0 6px 20px rgba(0,229,255,.15);
}
.quiz-btn:hover {
  box-shadow: 0 10px 28px rgba(0,229,255,.25);
  transform: translateY(-2px);
}
.quiz-btn:active { transform: translateY(0); }

@media (max-width:560px){
  .quiz-card { padding:18px; }
  .quiz-card h2 { font-size:20px; }
}

.video-carousel {
  margin: 40px auto;
  text-align: center;
}
.carousel-title {
  font-size: 22px;
  margin-bottom: 16px;
  color: var(--neon, #00e5ff);
}

.carousel-wrapper {
  overflow: hidden;
  border-radius: 16px;
  box-shadow: 0 8px 28px rgba(0,0,0,.35);
  max-width: 700px;
  margin: 0 auto;
}
.carousel-track {
  display: flex;
  transition: transform .6s ease;
}
.carousel-item {
  min-width: 100%;
}
.carousel-item iframe {
  width: 100%;
  height: 390px;
  display: block;
  border: none;
  border-radius: 16px;
}

.carousel-pagers{
  margin-top: 12px;
  display:flex; gap:10px; justify-content:center; align-items:center;
}

.pager{
  appearance:none; border:0; background:transparent; padding:0; cursor:pointer;
}
.pager:focus-visible{ outline:2px solid var(--neon,#00e5ff); border-radius:10px; }

.meter{
  display:block; width:70px; height:8px; border-radius:999px;
  background: rgba(255,255,255,.18);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.06);
  overflow:hidden;
}
.meter .bar{
  display:block; height:100%; width:0%;
  background: linear-gradient(90deg, #00e5ff, #67e8f9);
  border-radius:999px;
}
.meter .bar.running{
  animation: pagerFill var(--dur, 7s) linear forwards;
}
@keyframes pagerFill{ from{width:0%} to{width:100%} }

@media (max-width:560px){
  .meter{ width:54px; height:7px; }
}


@media(max-width:600px){
  .carousel-item iframe { height: 220px; }
}

.back-btn {
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-bottom:16px;
  color:var(--neon,#00e5ff);
  text-decoration:none;
  font-weight:500;
  border:1px solid var(--border);
  padding:6px 12px;
  border-radius:12px;
  background:rgba(0,229,255,.05);
  transition:all .25s ease;
}

.back-btn:hover {
  color:#67e8f9;
  background:rgba(0,229,255,.08);
  box-shadow:0 4px 12px rgba(0,229,255,.2);
  transform:translateY(-1px);
}

.back-btn i {
  font-size:14px;
}