/* ============================================================
   VocabPulse — Design Tokens
   ============================================================ */
:root{
  /* Color */
  --violet-900:#241143;
  --violet-800:#341a63;
  --violet-600:#6d28d9;
  --violet-500:#8447e6;
  --magenta-500:#c0269f;
  --coral-500:#f2394f;
  --amber-400:#f5b942;
  --paper:#faf7fd;
  --paper-dim:#f1ecf9;
  --card:#ffffff;
  --ink:#1d1330;
  --ink-soft:#5b4f74;
  --line:#e4dcf3;

  --grad-pulse:linear-gradient(100deg,var(--violet-600) 0%,var(--magenta-500) 52%,var(--coral-500) 100%);
  --grad-dark:linear-gradient(160deg,var(--violet-900) 0%,#3a1856 60%,#5c1444 100%);

  /* Type */
  --f-display:'Space Grotesk', system-ui, sans-serif;
  --f-body:'Manrope', system-ui, sans-serif;
  --f-mono:'JetBrains Mono', ui-monospace, monospace;

  /* Layout */
  --maxw:1180px;
  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:10px;
  --shadow-card:0 20px 45px -25px rgba(36,17,67,.35);
  --shadow-soft:0 10px 30px -18px rgba(36,17,67,.28);
}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important;}
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block;}
a{color:inherit;}
h1,h2,h3,h4{font-family:var(--f-display); margin:0; line-height:1.08; letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0; padding:0;}
button, .btn{font-family:var(--f-body); cursor:pointer;}

:focus-visible{
  outline:3px solid var(--coral-500);
  outline-offset:3px;
  border-radius:6px;
}

.wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px;}
.mono{font-family:var(--f-mono); letter-spacing:.02em;}

/* ---------------- Header ---------------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(250,247,253,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.brand{display:flex; align-items:center; gap:12px; text-decoration:none; color:var(--ink);}
.brand img{width:38px; height:38px; border-radius:10px;}
.brand-name{font-family:var(--f-display); font-weight:700; font-size:1.15rem;}
.brand-pulse{
  display:inline-block; width:7px; height:7px; border-radius:50%;
  background:var(--coral-500); margin-left:2px;
  animation:blip 1.8s ease-in-out infinite;
}
@keyframes blip{0%,100%{opacity:.35; transform:scale(.85);}50%{opacity:1; transform:scale(1.15);}}

.main-nav{display:flex; align-items:center; gap:34px;}
.main-nav a{
  text-decoration:none; color:var(--ink-soft); font-weight:600; font-size:.94rem;
  transition:color .15s ease;
}
.main-nav a:hover{color:var(--violet-600);}
.header-cta{
  display:inline-flex; align-items:center; gap:8px;
  background:var(--grad-pulse); color:#fff; font-weight:700; font-size:.92rem;
  padding:11px 20px; border-radius:999px; text-decoration:none; border:none;
  box-shadow:var(--shadow-soft);
  transition:transform .15s ease, box-shadow .15s ease;
}
.header-cta:hover{transform:translateY(-1px); box-shadow:0 14px 28px -14px rgba(194,30,80,.55);}
.nav-toggle{display:none;}

/* ---------------- Hero ---------------- */
.hero{
  position:relative; overflow:hidden;
  padding:88px 0 60px;
}
.hero .wrap{
  display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--f-mono); font-size:.76rem; font-weight:500;
  letter-spacing:.08em; text-transform:uppercase;
  color:var(--violet-600); background:var(--paper-dim);
  border:1px solid var(--line); padding:7px 14px; border-radius:999px;
}
.hero h1{
  margin-top:22px; font-size:clamp(2.3rem, 4.1vw, 3.5rem); font-weight:700;
}
.hero h1 .grad{
  background:var(--grad-pulse); -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero p.lede{
  margin-top:22px; font-size:1.12rem; color:var(--ink-soft); max-width:520px;
}
.hero-ctas{display:flex; gap:14px; margin-top:34px; flex-wrap:wrap;}
.btn-primary{
  background:var(--ink); color:#fff; font-weight:700; font-size:.98rem;
  padding:15px 26px; border-radius:14px; text-decoration:none; border:none;
  display:inline-flex; align-items:center; gap:10px;
  transition:transform .15s ease, background .15s ease;
}
.btn-primary:hover{transform:translateY(-2px); background:var(--violet-800);}
.btn-secondary{
  background:transparent; color:var(--ink); font-weight:700; font-size:.98rem;
  padding:14px 24px; border-radius:14px; text-decoration:none;
  border:1.5px solid var(--line);
  display:inline-flex; align-items:center; gap:10px;
  transition:border-color .15s ease, color .15s ease;
}
.btn-secondary:hover{border-color:var(--violet-600); color:var(--violet-600);}

.hero-stats{display:flex; gap:30px; margin-top:46px; flex-wrap:wrap;}
.hero-stats div{display:flex; flex-direction:column; gap:2px;}
.hero-stats .num{font-family:var(--f-mono); font-size:1.5rem; font-weight:700; color:var(--ink);}
.hero-stats .lbl{font-size:.82rem; color:var(--ink-soft);}

/* Hero visual */
.hero-visual{position:relative; display:flex; justify-content:center;}
.pulse-svg{position:absolute; inset:-40px -20px; width:calc(100% + 40px); z-index:0; pointer-events:none;}
.pulse-path{
  fill:none; stroke:url(#pulseGrad); stroke-width:2.5; stroke-linecap:round;
  stroke-dasharray:1400; stroke-dashoffset:1400;
  animation:draw 3.4s ease-in-out infinite;
}
@keyframes draw{
  0%{stroke-dashoffset:1400;}
  55%{stroke-dashoffset:0;}
  100%{stroke-dashoffset:-1400;}
}
.phone-frame{
  position:relative; z-index:1;
  width:280px; border-radius:38px; padding:10px;
  background:var(--ink); box-shadow:var(--shadow-card);
}
.phone-frame img{border-radius:30px; width:100%;}
.float-chip{
  position:absolute; z-index:2; background:var(--card); border:1px solid var(--line);
  border-radius:14px; padding:10px 14px; box-shadow:var(--shadow-soft);
  font-size:.82rem; display:flex; align-items:center; gap:8px; font-weight:600;
}
.float-chip .dot{width:8px; height:8px; border-radius:50%; background:var(--coral-500); flex:none;}
.float-chip.c1{top:6%; left:-8%;}
.float-chip.c2{bottom:14%; right:-10%;}
.float-chip.c3{bottom:-4%; left:8%; font-family:var(--f-mono); font-weight:500;}

/* ---------------- Section shells ---------------- */
section{padding:96px 0;}
.section-head{max-width:640px; margin-bottom:52px;}
.section-head .eyebrow{margin-bottom:16px;}
.section-head h2{font-size:clamp(1.8rem, 2.8vw, 2.5rem); font-weight:700;}
.section-head p{margin-top:16px; color:var(--ink-soft); font-size:1.05rem;}
.section-alt{background:var(--paper-dim);}

/* ---------------- Feature grid ---------------- */
.feature-grid{
  display:grid; grid-template-columns:repeat(3, 1fr); gap:22px;
}
.feature-card{
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius-md);
  padding:28px 26px; transition:transform .18s ease, box-shadow .18s ease;
}
.feature-card:hover{transform:translateY(-4px); box-shadow:var(--shadow-soft);}
.feature-icon{
  width:44px; height:44px; border-radius:12px; display:flex; align-items:center; justify-content:center;
  background:var(--grad-pulse); color:#fff; margin-bottom:18px;
}
.feature-icon svg{width:22px; height:22px;}
.feature-card h3{font-size:1.08rem; font-weight:700; margin-bottom:8px;}
.feature-card p{color:var(--ink-soft); font-size:.95rem;}
.feature-tag{
  display:inline-block; margin-top:14px; font-family:var(--f-mono); font-size:.72rem;
  color:var(--violet-600); background:var(--paper-dim); border-radius:999px; padding:4px 10px;
}

/* ---------------- Screens showcase ---------------- */
.screens-strip{
  display:grid; grid-template-columns:repeat(3, 1fr); gap:28px; align-items:start;
}
.screen-card{text-align:center;}
.screen-card .phone-frame{width:100%; max-width:230px; margin:0 auto;}
.screen-card h4{margin-top:22px; font-size:1.02rem; font-weight:700;}
.screen-card p{margin-top:6px; color:var(--ink-soft); font-size:.9rem;}

/* ---------------- Steps ---------------- */
.steps{
  display:grid; grid-template-columns:repeat(4,1fr); gap:0;
  position:relative;
}
.steps::before{
  content:"";
  position:absolute; top:26px; left:6%; right:6%; height:2px;
  background:repeating-linear-gradient(90deg, var(--line) 0 8px, transparent 8px 16px);
}
.step{position:relative; padding-right:18px;}
.step-num{
  width:52px; height:52px; border-radius:50%; background:var(--card);
  border:2px solid var(--violet-600); color:var(--violet-600);
  font-family:var(--f-mono); font-weight:700; font-size:1.05rem;
  display:flex; align-items:center; justify-content:center; margin-bottom:20px;
  position:relative; z-index:1;
}
.step h4{font-size:1.02rem; font-weight:700; margin-bottom:8px;}
.step p{color:var(--ink-soft); font-size:.9rem;}

/* ---------------- Exam chips ---------------- */
.exam-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:22px;}
.exam-card{
  border-radius:var(--radius-md); padding:30px 26px; color:#fff;
  background:var(--grad-dark); position:relative; overflow:hidden;
}
.exam-card::after{
  content:""; position:absolute; inset:0;
  background:radial-gradient(circle at 85% 15%, rgba(255,255,255,.14), transparent 55%);
}
.exam-card h3{font-family:var(--f-mono); font-size:1.3rem; letter-spacing:.03em; position:relative;}
.exam-card p{margin-top:12px; color:rgba(255,255,255,.78); font-size:.92rem; position:relative;}

/* ---------------- CTA banner ---------------- */
.cta-banner{
  background:var(--grad-pulse); border-radius:var(--radius-lg);
  padding:64px 56px; display:flex; align-items:center; justify-content:space-between;
  gap:32px; color:#fff; flex-wrap:wrap;
}
.cta-banner h2{font-size:clamp(1.6rem,3vw,2.2rem); max-width:480px;}
.cta-banner p{color:rgba(255,255,255,.85); margin-top:10px;}
.cta-banner .btn-primary{background:#fff; color:var(--violet-800);}
.cta-banner .btn-primary:hover{background:#fff; opacity:.92;}

/* ---------------- Footer ---------------- */
footer{background:var(--violet-900); color:rgba(255,255,255,.75); padding:64px 0 32px;}
.footer-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{display:flex; align-items:center; gap:10px; color:#fff; margin-bottom:14px;}
.footer-brand img{width:32px; height:32px; border-radius:8px;}
.footer-brand span{font-family:var(--f-display); font-weight:700; font-size:1.05rem;}
.footer-grid p{font-size:.9rem; line-height:1.7; max-width:280px;}
.footer-col h5{
  font-family:var(--f-mono); text-transform:uppercase; letter-spacing:.08em; font-size:.72rem;
  color:rgba(255,255,255,.5); margin-bottom:16px;
}
.footer-col a{
  display:block; text-decoration:none; font-size:.92rem; margin-bottom:12px; color:rgba(255,255,255,.82);
  transition:color .15s ease;
}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center; padding-top:26px;
  font-size:.82rem; color:rgba(255,255,255,.5); flex-wrap:wrap; gap:12px;
}

/* ---------------- Legal / doc pages ---------------- */
.doc-hero{
  background:var(--grad-dark); color:#fff; padding:72px 0 56px;
}
.doc-hero .eyebrow{background:rgba(255,255,255,.12); border-color:rgba(255,255,255,.2); color:#fff;}
.doc-hero h1{margin-top:18px; font-size:clamp(2rem,3.4vw,2.7rem);}
.doc-hero p{margin-top:14px; color:rgba(255,255,255,.75); font-family:var(--f-mono); font-size:.85rem;}

.doc-body{padding:64px 0 100px;}
.doc-layout{display:grid; grid-template-columns:240px 1fr; gap:56px;}
.doc-toc{position:sticky; top:100px; align-self:start;}
.doc-toc h5{
  font-family:var(--f-mono); text-transform:uppercase; font-size:.72rem; letter-spacing:.08em;
  color:var(--ink-soft); margin-bottom:14px;
}
.doc-toc a{
  display:block; text-decoration:none; color:var(--ink-soft); font-size:.9rem;
  padding:7px 0 7px 14px; border-left:2px solid var(--line); transition:all .15s ease;
}
.doc-toc a:hover{color:var(--violet-600); border-left-color:var(--violet-600);}

.doc-content h2{
  font-size:1.4rem; margin-top:46px; margin-bottom:14px; padding-top:8px; scroll-margin-top:100px;
}
.doc-content h2:first-child{margin-top:0;}
.doc-content p{color:var(--ink-soft); margin-bottom:14px; font-size:.98rem; line-height:1.75;}
.doc-content ul{margin:14px 0 14px 0; padding-left:0;}
.doc-content li{
  list-style:none; position:relative; padding-left:22px; margin-bottom:10px;
  color:var(--ink-soft); font-size:.98rem; line-height:1.65;
}
.doc-content li::before{
  content:""; position:absolute; left:0; top:9px; width:7px; height:7px; border-radius:50%;
  background:var(--grad-pulse);
}
.doc-content strong{color:var(--ink);}
.doc-content table{width:100%; border-collapse:collapse; margin:18px 0 22px; font-size:.92rem;}
.doc-content th, .doc-content td{
  text-align:left; padding:11px 14px; border-bottom:1px solid var(--line); color:var(--ink-soft);
}
.doc-content th{
  font-family:var(--f-mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.06em;
  color:var(--ink); background:var(--paper-dim);
}
.callout{
  background:var(--paper-dim); border:1px solid var(--line); border-left:3px solid var(--violet-600);
  border-radius:var(--radius-sm); padding:18px 20px; margin:22px 0;
}
.callout p{margin:0; color:var(--ink); font-size:.92rem;}
.doc-content a.inline-link{color:var(--violet-600); font-weight:600; text-decoration:underline; text-decoration-color:var(--line);}

/* ---------------- Responsive ---------------- */
@media (max-width: 980px){
  .hero .wrap{grid-template-columns:1fr; gap:48px;}
  .hero-visual{order:-1;}
  .pulse-svg{display:none;}
  .feature-grid{grid-template-columns:repeat(2,1fr);}
  .screens-strip{grid-template-columns:1fr; max-width:320px; margin:0 auto; gap:48px;}
  .steps{grid-template-columns:1fr 1fr; row-gap:36px;}
  .steps::before{display:none;}
  .exam-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .doc-layout{grid-template-columns:1fr;}
  .doc-toc{position:static; display:flex; gap:18px; flex-wrap:wrap; margin-bottom:20px;}
  .doc-toc a{border-left:none; border-bottom:2px solid var(--line); padding:4px 0;}
}
@media (max-width: 720px){
  .hero{padding:44px 0 40px;}
  .hero-visual{padding:0 18px;}
  .phone-frame{width:240px;}
  .float-chip{font-size:.72rem; padding:8px 12px; gap:6px; white-space:nowrap;}
  .float-chip.c1{top:-10px; left:2px; right:auto;}
  .float-chip.c2{display:none;}
  .float-chip.c3{left:auto; right:2px; bottom:-14px;}
  .main-nav{
    position:fixed; inset:76px 0 0 0; background:var(--paper); flex-direction:column;
    align-items:flex-start; padding:30px 28px; gap:22px; transform:translateY(-8px);
    opacity:0; pointer-events:none; transition:opacity .18s ease, transform .18s ease;
  }
  .main-nav.open{opacity:1; pointer-events:auto; transform:translateY(0);}
  .main-nav a{font-size:1.05rem;}
  .nav-toggle{
    display:flex; align-items:center; justify-content:center; width:40px; height:40px;
    border-radius:10px; border:1px solid var(--line); background:var(--card);
  }
  .header-cta{display:none;}
  .feature-grid{grid-template-columns:1fr;}
  .cta-banner{padding:44px 28px; flex-direction:column; text-align:center;}
  .footer-grid{grid-template-columns:1fr; gap:30px;}
  .footer-bottom{flex-direction:column; align-items:flex-start;}
}