/* Smart Lower Thirds Landing — flat modern UI
   Files: index.html + style.css + script.js
*/
:root{
  --bg: #0b1220;
  --bg2:#0f172a;
  --card:#111b31;
  --card2:#0f1a33;
  --text:#e5e7eb;
  --muted:#9ca3af;
  --line: rgba(148, 163, 184, 0.18);
  --line2: rgba(148, 163, 184, 0.28);
  --shadow: 0 14px 38px rgba(0,0,0,0.35);
  --r: 16px;
  --r2: 22px;
  --max: 1120px;

  --accent:#60a5fa;
  --accent2:#34d399;
  --accent3:#a78bfa;

  --btn:#0b1220;
  --btnLine: rgba(148, 163, 184, 0.32);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #070b14, var(--bg) 28%, #070b14 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

a{ color: inherit; text-decoration:none; }
code, pre{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
code{
  font-size: 0.92em;
  background: rgba(0,0,0,0.22);
  border: 1px solid var(--line);
  padding: .1rem .35rem;
  border-radius: 8px;
}
pre{
  margin: .55rem 0 0;
  padding: .85rem .9rem;
  border-radius: 14px;
  background: rgba(0,0,0,0.22);
  border: 1px solid var(--line);
  overflow:auto;
  font-size: .86rem;
  line-height: 1.5;
}

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 18px;
}

/* Topbar */
.topbar{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,18,32,0.78);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar__inner{
  height: 64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 14px;
}
.brand{
  display:flex;
  align-items:center;
  gap: 10px;
  min-width: 210px;
}
.brand__mark{
  width: 34px; height: 34px;
  border-radius: 10px;
  display:flex; align-items:center; justify-content:center;
  background: linear-gradient(135deg, rgba(96,165,250,0.25), rgba(52,211,153,0.18));
  border: 1px solid var(--line);
  font-weight: 800;
  font-size: .78rem;
  letter-spacing: .04em;
}
.brand__text{ display:flex; flex-direction:column; line-height: 1.05; }
.brand__name{ font-weight: 700; font-size: .95rem; }
.brand__tag{ font-size: .72rem; color: var(--muted); }

.nav{
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 6px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.nav a{
  color: var(--muted);
  font-size: .86rem;
  padding: 8px 10px;
  border-radius: 999px;
  transition: background .15s ease, color .15s ease;
}
.nav a:hover{ background: rgba(255,255,255,0.06); color: var(--text); }

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

.navbtn{
  display:none;
  width: 40px; height: 40px;
  border-radius: 12px;
  border: 1px solid var(--btnLine);
  background: rgba(0,0,0,0.12);
  cursor:pointer;
}
.navbtn span{
  display:block;
  height:2px;
  margin: 6px 10px;
  background: rgba(229,231,235,0.86);
  border-radius: 99px;
}

/* Mobile nav */
.mobile-nav{
  border-top: 1px solid var(--line);
  background: rgba(11,18,32,0.92);
}
.mobile-nav__inner{
  padding: 12px 18px 16px;
  display:grid;
  gap: 8px;
}
.mobile-nav a{
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: .92rem;
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--btnLine);
  background: rgba(0,0,0,0.10);
  color: var(--text);
  font-weight: 600;
  font-size: .88rem;
  cursor:pointer;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
  white-space: nowrap;
}
.btn:hover{ transform: translateY(-1px); background: rgba(255,255,255,0.06); }
.btn--primary{
  border-color: rgba(96,165,250,0.45);
  background: linear-gradient(135deg, rgba(96,165,250,0.24), rgba(52,211,153,0.18));
}
.btn--ghost{ background: rgba(0,0,0,0.08); }

/* Hero */
.hero{
  padding: 34px 0 26px;
}
.hero__grid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 18px;
  align-items:start;
}
.hero__left h1{
  margin: 14px 0 10px;
  font-size: clamp(2.0rem, 3.2vw, 2.8rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.grad{
  background: linear-gradient(90deg, var(--accent), var(--accent3), var(--accent2));
  -webkit-background-clip:text;
  color: transparent;
}
.lead{
  margin: 0 0 16px;
  color: rgba(229,231,235,0.86);
  line-height: 1.6;
  font-size: 1.02rem;
}
.pill{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: .86rem;
}
.pill__dot{
  width: 8px; height: 8px;
  border-radius: 999px;
  background: var(--accent2);
  box-shadow: 0 0 0 5px rgba(52,211,153,0.16);
}
.hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin: 10px 0 16px;
}
.stats{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 10px;
  margin: 10px 0 14px;
}
.stat{
  border-radius: var(--r);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  padding: 12px 12px 11px;
}
.stat__k{ font-weight: 800; letter-spacing: -0.01em; }
.stat__v{ margin-top: 2px; color: var(--muted); font-size: .86rem; }

.notice{
  border-radius: var(--r2);
  border: 1px solid rgba(248,113,113,0.28);
  background: rgba(239,68,68,0.08);
  padding: 14px 14px;
}
.notice__title{
  font-weight: 800;
  margin-bottom: 6px;
}
.notice__body{
  color: rgba(229,231,235,0.88);
  line-height: 1.55;
  font-size: .92rem;
}

/* Cards */
.card{
  border-radius: var(--r2);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  box-shadow: var(--shadow);
  padding: 14px;
}
.card--media{ padding: 14px; }
.card__head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.card__title{ font-weight: 800; }
.card__meta{ color: var(--muted); font-size: .84rem; }
.card__foot{ margin-top: 10px; }

.card--mini{ margin-top: 10px; }
.mini-row{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
}
.mini-chip{
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.12);
  color: var(--muted);
  font-size: .84rem;
}

/* Media ratio */
.ratio{
  position:relative;
  width:100%;
  padding-top: 56.25%;
  border-radius: 16px;
  overflow:hidden;
  border: 1px solid rgba(96,165,250,0.30);
  background: rgba(0,0,0,0.18);
}
.ratio--wide{ border-radius: 18px; }
.ratio iframe{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  border:0;
}

/* Sections */
.section{
  padding: 28px 0;
}
.section--alt{
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section__head{
  margin-bottom: 14px;
}
.section__head h2{
  margin: 0 0 6px;
  font-size: 1.55rem;
  letter-spacing: -0.01em;
}
.muted{ color: var(--muted); }
.small{ font-size: .85rem; }

.grid3{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.grid2{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.feat{
  border-radius: var(--r2);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  padding: 14px;
}
.feat__icon{
  width: 42px; height: 42px;
  border-radius: 14px;
  display:flex;
  align-items:center;
  justify-content:center;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.12);
  margin-bottom: 10px;
  font-size: 1.1rem;
}
.feat h3{ margin: 0 0 6px; font-size: 1.05rem; }
.feat p{ margin: 0; color: rgba(229,231,235,0.84); line-height: 1.55; font-size: .92rem; }

.list{
  margin: 10px 0 0;
  padding-left: 18px;
  color: rgba(229,231,235,0.86);
  line-height: 1.65;
  font-size: .92rem;
}
.kv{
  margin-top: 10px;
  display:grid;
  grid-template-columns: 160px 1fr;
  gap: 10px;
  align-items:start;
}
.kv__k{ color: var(--muted); font-size: .86rem; }
.kv__v{ display:flex; flex-wrap:wrap; gap: 8px; }
.kbd{
  display:inline-flex;
  align-items:center;
  padding: 7px 9px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.10);
  font-size: .85rem;
  color: rgba(229,231,235,0.86);
}

.callouts{ display:grid; gap: 8px; margin-top: 10px; }
.callout{
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 10px 10px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.10);
  color: rgba(229,231,235,0.86);
  font-size: .9rem;
}
.dot{
  width: 8px; height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(96,165,250,0.12);
}

/* Tabs */
.tabs{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin-bottom: 12px;
}
.tab{
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--line2);
  background: rgba(0,0,0,0.10);
  color: var(--muted);
  font-weight: 700;
  font-size: .88rem;
  cursor:pointer;
  transition: background .12s ease, color .12s ease, transform .12s ease;
}
.tab:hover{ transform: translateY(-1px); background: rgba(255,255,255,0.06); color: var(--text); }
.tab.is-active{
  border-color: rgba(96,165,250,0.45);
  background: rgba(96,165,250,0.12);
  color: var(--text);
}

/* Table */
.table-wrap{ overflow:auto; }
table{
  width:100%;
  border-collapse: collapse;
  font-size: .92rem;
}
th,td{
  text-align:left;
  padding: 10px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th{
  color: rgba(229,231,235,0.92);
  font-weight: 800;
  background: rgba(0,0,0,0.12);
}
tbody tr:hover td{ background: rgba(255,255,255,0.03); }

.splitline{
  height: 1px;
  background: var(--line);
  margin: 14px 0;
}

.codegrid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* Install */
.steps{
  margin: 0;
  padding-left: 18px;
  color: rgba(229,231,235,0.88);
  line-height: 1.7;
  font-size: .95rem;
}
.cta-row{
  margin-top: 14px;
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
}
.links{
  display:grid;
  gap: 10px;
  margin-top: 10px;
}
.links a{
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.10);
  color: rgba(229,231,235,0.92);
}
.links a:hover{ background: rgba(255,255,255,0.06); }

.h4{ margin: 0 0 6px; }

/* Footer */
.footer{
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
}
.footer__inner{
  display:flex;
  justify-content:space-between;
  gap: 12px;
  flex-wrap:wrap;
}
.footer__brand{
  font-weight: 900;
  letter-spacing: -0.01em;
}

/* Responsive */
@media (max-width: 980px){
  .hero__grid{ grid-template-columns: 1fr; }
  .stats{ grid-template-columns: 1fr; }
  .grid3{ grid-template-columns: 1fr; }
  .grid2{ grid-template-columns: 1fr; }
  .codegrid{ grid-template-columns: 1fr; }
  .kv{ grid-template-columns: 1fr; }
  .nav{ display:none; }
  .topbar__cta{ display:none; }
  .navbtn{ display:block; }
}