/* ==========================================================================
   BookClub24 Premium Website
   Author: ChatGPT
   Notes:
   - Clean, readable CSS (no minification)
   - Mobile-first, responsive
   - Uses CSS variables for easy theming
   ========================================================================== */

/* -----------------------------
   CSS Variables / Theme
----------------------------- */
:root{
  --bg: #070A12;
  --bg2:#0B1020;
  --card:#0F172A;
  --card2:#0B1224;
  --text:#E6EAF2;
  --muted:#A6B0C3;
  --line: rgba(255,255,255,.10);

  --brand:#7C3AED;         /* violet */
  --brand2:#22C55E;        /* emerald */
  --brand3:#F59E0B;        /* amber */
  --danger:#EF4444;

  --shadow: 0 18px 60px rgba(0,0,0,.55);
  --shadow2: 0 10px 30px rgba(0,0,0,.35);

  --radius: 18px;
  --radius2: 28px;
  --max: 1160px;

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

/* -----------------------------
   Resets / Base
----------------------------- */
*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font);
  background: radial-gradient(1200px 700px at 10% 10%, rgba(124,58,237,.18), transparent 60%),
              radial-gradient(1000px 600px at 85% 15%, rgba(34,197,94,.14), transparent 55%),
              radial-gradient(900px 600px at 50% 95%, rgba(245,158,11,.10), transparent 55%),
              linear-gradient(180deg, var(--bg), var(--bg2));
  color: var(--text);
  line-height: 1.55;
}

img{ max-width:100%; height:auto; display:block; }
a{ color: inherit; text-decoration: none; }
p{ margin: 0 0 1rem; color: var(--muted); }
h1,h2,h3,h4{ margin: 0 0 .6rem; letter-spacing: -0.02em; }
h1{ font-size: clamp(2.3rem, 4.2vw, 3.6rem); line-height: 1.05; }
h2{ font-size: clamp(1.6rem, 2.6vw, 2.2rem); line-height: 1.1; }
h3{ font-size: 1.25rem; line-height: 1.25; }

.container{
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
}

.section{
  padding: 84px 0;
}

.mini{
  padding: 58px 0;
}

hr.sep{
  border:0;
  height:1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  margin: 0;
}

/* -----------------------------
   Buttons / Badges
----------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
  color: var(--text);
  font-weight: 700;
  transition: transform .14s ease, background .14s ease, border-color .14s ease;
  cursor: pointer;
  user-select: none;
}
.btn:hover{ transform: translateY(-1px); border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.06); }
.btn:active{ transform: translateY(0px); }

.btn-primary{
  border-color: rgba(124,58,237,.55);
  background: linear-gradient(135deg, rgba(124,58,237,.96), rgba(124,58,237,.55));
  box-shadow: 0 10px 30px rgba(124,58,237,.22);
}
.btn-primary:hover{ background: linear-gradient(135deg, rgba(124,58,237,1), rgba(124,58,237,.60)); }

.btn-ghost{
  background: transparent;
}
.btn-ghost:hover{ background: rgba(255,255,255,.05); }

.btn-small{ padding: 10px 14px; font-weight: 700; font-size: .95rem; }

.badge{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.035);
  color: var(--muted);
  font-weight: 650;
  font-size: .88rem;
}

.tag{
  display:inline-flex;
  align-items:center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  font-weight: 650;
  font-size: .85rem;
}

/* -----------------------------
   Header / Nav
----------------------------- */
.header{
  position: sticky;
  top:0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(7,10,18,.55);
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.nav{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: -0.03em;
}
.brand svg{ width: 34px; height: 34px; }
.brand span{ font-size: 1.05rem; }
.brand small{
  display:block;
  font-weight: 650;
  font-size: .78rem;
  color: var(--muted);
  letter-spacing: 0;
  margin-top: -2px;
}

.navlinks{
  display:flex;
  align-items:center;
  gap: 12px;
}
.navlinks a{
  padding: 8px 10px;
  border-radius: 12px;
  color: var(--muted);
  font-weight: 700;
  transition: background .14s ease, color .14s ease;
}
.navlinks a:hover{
  color: var(--text);
  background: rgba(255,255,255,.04);
}
.navlinks a.active{
  color: var(--text);
  background: rgba(124,58,237,.16);
  border: 1px solid rgba(124,58,237,.25);
}

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

.burger{
  display:none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.03);
  align-items:center;
  justify-content:center;
}

.burger span{
  width: 18px;
  height: 2px;
  background: var(--text);
  display:block;
  position: relative;
}
.burger span:before,
.burger span:after{
  content:"";
  position:absolute;
  left:0;
  width: 18px;
  height: 2px;
  background: var(--text);
}
.burger span:before{ top:-6px; opacity:.9; }
.burger span:after{ top: 6px; opacity:.9; }

.mobile-panel{
  display:none;
  border-top: 1px solid rgba(255,255,255,.07);
  padding: 10px 0 18px;
}
.mobile-panel .navlinks{
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
}
.mobile-panel .navlinks a{
  padding: 12px 12px;
}
.mobile-panel .navcta{
  display:flex;
  gap: 10px;
  padding-top: 10px;
}

/* -----------------------------
   Hero
----------------------------- */
.hero{
  padding: 74px 0 24px;
  position: relative;
  overflow:hidden;
}

.hero-grid{
  display:grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 30px;
  align-items: center;
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap: .55rem;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(124,58,237,.25);
  background: rgba(124,58,237,.10);
  color: var(--text);
  font-weight: 750;
  width: fit-content;
}

.kicker .dot{
  width: 9px;
  height: 9px;
  border-radius: 99px;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.9), rgba(255,255,255,0)),
              linear-gradient(135deg, var(--brand), rgba(34,197,94,.85));
  box-shadow: 0 0 0 3px rgba(124,58,237,.15);
}

.hero p{
  font-size: 1.07rem;
  max-width: 54ch;
}

.hero-actions{
  display:flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.metrics{
  display:flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 22px;
}
.metric{
  padding: 10px 12px;
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 14px;
  background: rgba(255,255,255,.03);
}
.metric strong{
  display:block;
  color: var(--text);
  font-size: 1rem;
}
.metric span{
  color: var(--muted);
  font-size: .85rem;
}

/* Hero card / mock */
.hero-card{
  position: relative;
  border-radius: var(--radius2);
  border: 1px solid rgba(255,255,255,.10);
  background:
    radial-gradient(600px 300px at 0% 0%, rgba(124,58,237,.18), transparent 60%),
    radial-gradient(500px 260px at 100% 30%, rgba(34,197,94,.14), transparent 55%),
    radial-gradient(500px 260px at 70% 110%, rgba(245,158,11,.12), transparent 55%),
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  box-shadow: var(--shadow);
  overflow:hidden;
}

.hero-card .top{
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 18px 18px 10px;
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.hero-card .dots{
  display:flex;
  gap: 6px;
}
.hero-card .dots i{
  width: 10px;
  height: 10px;
  display:block;
  border-radius: 99px;
  background: rgba(255,255,255,.18);
}
.hero-card .dots i:nth-child(1){ background: rgba(245,158,11,.80); }
.hero-card .dots i:nth-child(2){ background: rgba(34,197,94,.75); }
.hero-card .dots i:nth-child(3){ background: rgba(239,68,68,.75); }

.hero-card .body{
  padding: 18px;
}

.quiz{
  display:grid;
  gap: 12px;
}
.quiz .q{
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(11,18,36,.55);
  padding: 12px 12px;
}
.quiz label{
  display:block;
  color: var(--muted);
  font-weight: 650;
  font-size: .90rem;
  margin-bottom: 6px;
}
.quiz select, .quiz input{
  width: 100%;
  border-radius: 12px;
  padding: 12px 12px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  color: var(--text);
  outline: none;
}
.quiz select:focus, .quiz input:focus{
  border-color: rgba(124,58,237,.45);
  box-shadow: 0 0 0 4px rgba(124,58,237,.18);
}

/* -----------------------------
   Cards / Grids
----------------------------- */
.grid{
  display:grid;
  gap: 18px;
}
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-2{ grid-template-columns: repeat(2, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }

.card{
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.10);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  box-shadow: var(--shadow2);
  padding: 18px;
}
.card.soft{
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
  box-shadow: none;
}
.card h3{ margin-bottom: .35rem; }

.icon{
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display:flex;
  align-items:center;
  justify-content:center;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.03);
  margin-bottom: 10px;
}
.icon svg{ width: 22px; height: 22px; }

.lead{
  font-size: 1.05rem;
  color: var(--muted);
}

.split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  align-items: start;
}

.panel{
  border-radius: var(--radius2);
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
  padding: 22px;
}

.panel .head{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

/* -----------------------------
   Feature rows
----------------------------- */
.feature-row{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  align-items: center;
}

.mock{
  border-radius: var(--radius2);
  border: 1px solid rgba(255,255,255,.10);
  background:
    radial-gradient(800px 400px at 10% 10%, rgba(124,58,237,.16), transparent 60%),
    radial-gradient(700px 350px at 80% 15%, rgba(34,197,94,.12), transparent 55%),
    linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  box-shadow: var(--shadow);
  padding: 22px;
  overflow:hidden;
}

.checklist{
  display:grid;
  gap: 10px;
}
.check{
  display:flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.09);
  background: rgba(255,255,255,.02);
}
.check i{
  width: 22px;
  height: 22px;
  border-radius: 99px;
  background: rgba(34,197,94,.18);
  border: 1px solid rgba(34,197,94,.25);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-top: 2px;
  flex: 0 0 auto;
}
.check i svg{ width: 14px; height: 14px; }
.check strong{
  display:block;
  color: var(--text);
  font-size: .98rem;
}
.check span{
  display:block;
  color: var(--muted);
  font-size: .90rem;
  margin-top: 2px;
}

/* -----------------------------
   Pricing
----------------------------- */
.pricing-switch{
  display:flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  margin: 18px 0 26px;
}
.toggle{
  width: 58px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.04);
  position: relative;
  cursor:pointer;
}
.toggle:after{
  content:"";
  position:absolute;
  top: 4px;
  left: 4px;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: rgba(255,255,255,.85);
  transition: left .16s ease;
}
.toggle.on{
  border-color: rgba(124,58,237,.35);
  background: rgba(124,58,237,.12);
}
.toggle.on:after{ left: 30px; background: rgba(255,255,255,.92); }

.price{
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin: 8px 0 0;
}
.price small{
  font-weight: 750;
  font-size: .95rem;
  color: var(--muted);
  margin-left: 6px;
}

.ribbon{
  display:inline-flex;
  align-items:center;
  gap: .45rem;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(34,197,94,.14);
  border: 1px solid rgba(34,197,94,.25);
  color: var(--text);
  font-weight: 800;
  font-size: .84rem;
}

/* -----------------------------
   Forms
----------------------------- */
.form{
  display:grid;
  gap: 12px;
}
.field{
  display:grid;
  gap: 6px;
}
.field label{
  color: var(--muted);
  font-weight: 700;
  font-size: .92rem;
}
.field input, .field textarea, .field select{
  width: 100%;
  border-radius: 14px;
  padding: 12px 12px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  color: var(--text);
  outline: none;
}
.field textarea{ min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus{
  border-color: rgba(124,58,237,.45);
  box-shadow: 0 0 0 4px rgba(124,58,237,.18);
}

/* -----------------------------
   Footer
----------------------------- */
.footer{
  padding: 56px 0 40px;
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 20px;
}
.footer a{ color: var(--muted); }
.footer a:hover{ color: var(--text); }
.footer .fine{
  color: rgba(166,176,195,.85);
  font-size: .92rem;
  margin-top: 14px;
}
.footer .legal{
  display:flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 14px;
  color: rgba(166,176,195,.75);
  font-size: .88rem;
}

/* -----------------------------
   Utilities
----------------------------- */
.center{ text-align:center; }
.m0{ margin:0; }
.mt8{ margin-top: 8px; }
.mt12{ margin-top: 12px; }
.mt18{ margin-top: 18px; }
.mt24{ margin-top: 24px; }
.mt32{ margin-top: 32px; }
.mb0{ margin-bottom: 0; }

.pill{
  display:inline-flex;
  padding: 10px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.09);
  color: var(--muted);
  font-weight: 700;
}

.reveal{
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.in{
  opacity: 1;
  transform: translateY(0px);
}

/* -----------------------------
   Table / Simple list
----------------------------- */
.table{
  width: 100%;
  border-collapse: collapse;
  overflow:hidden;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.10);
}
.table th, .table td{
  text-align:left;
  padding: 12px 12px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.table th{
  color: var(--muted);
  font-size: .9rem;
  font-weight: 800;
  background: rgba(255,255,255,.03);
}
.table tr:last-child td{ border-bottom: 0; }

/* -----------------------------
   Responsive
----------------------------- */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
  .feature-row{ grid-template-columns: 1fr; }
  .grid-3{ grid-template-columns: 1fr; }
  .grid-4{ grid-template-columns: 1fr 1fr; }
  .split{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px){
  .navlinks{ display:none; }
  .burger{ display:flex; }
  .mobile-panel{ display:none; }
  .grid-4{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .btn{ transition: none; }
  .reveal{ transition: none; }
}