/* ============================================================
   CertPrep — design tokens
   Display: Space Grotesk / Body: Inter / Data: IBM Plex Mono
   ============================================================ */
:root{
  --navy:#0B1E33;
  --navy-light:#13294A;
  --navy-lighter:#1B3A63;
  --teal:#14B8A6;
  --teal-dark:#0C8F81;
  --amber:#F5A623;
  --paper:#F5F7FA;
  --white:#FFFFFF;
  --ink:#132030;
  --slate:#5B6B7C;
  --border:#E1E7EF;
  --danger:#E1493D;
  --radius:14px;
  --radius-sm:8px;
  --shadow:0 10px 30px -12px rgba(11,30,51,.25);
  --shadow-sm:0 4px 14px -6px rgba(11,30,51,.18);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Inter",system-ui,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:"Space Grotesk",system-ui,sans-serif;
  margin:0 0 .5em;
  letter-spacing:-0.01em;
  line-height:1.15;
  color:var(--navy);
}
p{margin:0 0 1em;color:var(--slate);}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
.mono{font-family:"IBM Plex Mono",monospace;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section-tight{padding:56px 0;}
@media (max-width:720px){
  .section{padding:56px 0;}
}

/* ---------- eyebrow / labels ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:"IBM Plex Mono",monospace;
  font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--teal-dark);
  background:rgba(20,184,166,.1);
  border:1px solid rgba(20,184,166,.25);
  padding:6px 12px;border-radius:999px;
  margin-bottom:18px;
}
.eyebrow.on-dark{color:#8FE3D8;background:rgba(20,184,166,.14);border-color:rgba(143,227,216,.25);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:"Inter",sans-serif;font-weight:600;font-size:15px;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--teal);color:var(--navy);}
.btn-primary:hover{background:var(--teal-dark);color:var(--white);box-shadow:var(--shadow-sm);}
.btn-ghost{background:transparent;color:var(--white);border-color:rgba(255,255,255,.35);}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);}
.btn-outline{background:transparent;color:var(--navy);border-color:var(--border);}
.btn-outline:hover{border-color:var(--navy);}
.btn-block{width:100%;}
.btn-lg{padding:15px 30px;font-size:16px;}
.btn-amber{background:var(--amber);color:var(--navy);}
.btn-amber:hover{background:#e2941a;}
.btn[disabled]{opacity:.5;cursor:not-allowed;}

/* ---------- header ---------- */
.site-header{
  background:var(--navy);position:sticky;top:0;z-index:50;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:74px;}
.logo{display:flex;align-items:center;gap:9px;font-family:"Space Grotesk";font-weight:700;font-size:20px;color:#fff;}
.logo .bracket{color:var(--teal);font-family:"IBM Plex Mono";}
.nav-links{display:flex;gap:32px;align-items:center;}
.nav-links a{color:rgba(255,255,255,.78);font-size:14.5px;font-weight:500;transition:color .15s;}
.nav-links a:hover{color:#fff;}
.header-actions{display:flex;align-items:center;gap:14px;}
.header-actions a.login{color:rgba(255,255,255,.8);font-size:14.5px;font-weight:600;}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer;}
@media (max-width:900px){
  .nav-links{display:none;}
  .nav-toggle{display:block;}
}

/* ---------- hero ---------- */
.hero{background:var(--navy);color:#fff;position:relative;overflow:hidden;padding:72px 0 100px;}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(600px 400px at 85% 10%, rgba(20,184,166,.20), transparent 60%),
    radial-gradient(500px 500px at 100% 100%, rgba(245,166,35,.10), transparent 60%);
  pointer-events:none;
}
.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;position:relative;}
@media (max-width:960px){
  .hero .container{grid-template-columns:1fr;}
}
.hero h1{font-size:clamp(32px,4.6vw,52px);color:#fff;font-weight:700;}
.hero h1 .hl{color:var(--teal);}
.hero p.lead{color:rgba(255,255,255,.72);font-size:17.5px;max-width:520px;}
.hero-ctas{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap;}
.hero-stats{display:flex;gap:34px;margin-top:44px;flex-wrap:wrap;}
.hero-stats div{}
.hero-stats .num{font-family:"IBM Plex Mono";font-size:26px;font-weight:600;color:#fff;}
.hero-stats .lbl{font-size:13px;color:rgba(255,255,255,.55);}

/* ---------- hero quiz mock card (the signature element) ---------- */
.quiz-mock{
  background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:24px;color:var(--ink);position:relative;
}
.quiz-mock-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;}
.quiz-mock-badge{
  font-family:"IBM Plex Mono";font-size:12px;background:var(--navy);color:#fff;
  padding:5px 10px;border-radius:6px;
}
.quiz-mock-counter{font-family:"IBM Plex Mono";font-size:12.5px;color:var(--slate);}
.quiz-mock-progress{height:6px;border-radius:99px;background:var(--border);overflow:hidden;margin-bottom:18px;}
.quiz-mock-progress > div{height:100%;background:var(--teal);width:72%;}
.quiz-mock h4{font-size:16.5px;margin-bottom:16px;}
.quiz-mock-opt{
  display:flex;align-items:center;gap:10px;padding:11px 14px;border:1px solid var(--border);
  border-radius:var(--radius-sm);margin-bottom:9px;font-size:14.5px;color:var(--ink);
}
.quiz-mock-opt .dot{width:18px;height:18px;border-radius:50%;border:2px solid var(--border);flex:none;}
.quiz-mock-opt.correct{border-color:var(--teal);background:rgba(20,184,166,.08);}
.quiz-mock-opt.correct .dot{border-color:var(--teal);background:var(--teal);}
.quiz-mock-foot{display:flex;justify-content:space-between;align-items:center;margin-top:14px;font-size:12.5px;color:var(--slate);}
.quiz-mock-foot .free-left{color:var(--amber);font-weight:600;font-family:"IBM Plex Mono";}

/* ---------- trust bar ---------- */
.trust{background:var(--white);border-bottom:1px solid var(--border);padding:26px 0;}
.trust .container{display:flex;align-items:center;gap:22px;flex-wrap:wrap;justify-content:center;}
.trust .label{font-size:13px;color:var(--slate);font-weight:600;margin-right:6px;}
.pill{
  font-family:"IBM Plex Mono";font-size:12.5px;color:var(--navy);
  background:var(--paper);border:1px solid var(--border);border-radius:999px;padding:6px 13px;
}

/* ---------- section headers ---------- */
.section-head{max-width:640px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head h2{font-size:clamp(26px,3.4vw,38px);}

/* ---------- how it works ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
@media (max-width:820px){.steps{grid-template-columns:1fr;}}
.step{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:28px;}
.step .step-num{font-family:"IBM Plex Mono";font-size:13px;color:var(--teal-dark);font-weight:600;margin-bottom:14px;}
.step h3{font-size:19px;}

/* ---------- exam / category cards ---------- */
.exam-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
@media (max-width:960px){.exam-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.exam-grid{grid-template-columns:1fr;}}
.exam-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;transition:box-shadow .15s ease, transform .15s ease;
}
.exam-card:hover{box-shadow:var(--shadow-sm);transform:translateY(-2px);}
.exam-card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:14px;}
.exam-code{font-family:"IBM Plex Mono";font-size:12.5px;background:var(--navy);color:#fff;padding:5px 9px;border-radius:6px;}
.exam-level{font-size:11.5px;color:var(--slate);border:1px solid var(--border);padding:3px 8px;border-radius:6px;}
.exam-card h3{font-size:18px;margin-bottom:6px;}
.exam-meta{font-size:13px;color:var(--slate);margin-bottom:18px;}
.exam-card .btn{width:100%;}

/* ---------- features ---------- */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
@media (max-width:960px){.features{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.features{grid-template-columns:1fr;}}
.feature{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:24px;}
.feature .icon{
  width:42px;height:42px;border-radius:10px;background:rgba(20,184,166,.12);color:var(--teal-dark);
  display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:16px;
}
.feature h3{font-size:16.5px;}
.feature p{font-size:14px;margin:0;}

/* ---------- pricing ---------- */
.pricing-wrap{background:var(--navy);color:#fff;}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
@media (max-width:900px){.pricing-grid{grid-template-columns:1fr;max-width:420px;margin:0 auto;}}
.price-card{
  background:var(--navy-light);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);
  padding:30px 26px;position:relative;
}
.price-card.featured{border-color:var(--teal);box-shadow:0 0 0 1px var(--teal), var(--shadow);background:var(--navy-lighter);}
.price-card .badge-pop{
  position:absolute;top:-13px;left:26px;background:var(--teal);color:var(--navy);
  font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px;
}
.price-card .plan-name{font-family:"IBM Plex Mono";font-size:13px;color:var(--teal);text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px;}
.price-card .price{font-family:"Space Grotesk";font-size:38px;font-weight:700;color:#fff;}
.price-card .price small{font-size:14px;color:rgba(255,255,255,.5);font-weight:500;}
.price-card .strike{font-size:13px;color:rgba(255,255,255,.4);text-decoration:line-through;margin-left:8px;}
.price-card ul{list-style:none;margin:22px 0 26px;padding:0;}
.price-card li{display:flex;gap:9px;font-size:14px;color:rgba(255,255,255,.78);margin-bottom:11px;}
.price-card li .check{color:var(--teal);font-weight:700;}

/* ---------- testimonials ---------- */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
@media (max-width:900px){.testi-grid{grid-template-columns:1fr;}}
.testi-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:26px;}
.testi-stars{color:var(--amber);font-size:14px;margin-bottom:12px;letter-spacing:2px;}
.testi-card p{color:var(--ink);font-size:14.5px;}
.testi-person{display:flex;align-items:center;gap:10px;margin-top:16px;}
.avatar{width:38px;height:38px;border-radius:50%;background:var(--teal);color:var(--navy);display:flex;align-items:center;justify-content:center;font-family:"Space Grotesk";font-weight:700;font-size:14px;}
.testi-person .name{font-size:14px;font-weight:600;color:var(--navy);}
.testi-person .role{font-size:12.5px;color:var(--slate);}

/* ---------- FAQ ---------- */
.faq-list{max-width:760px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--border);padding:20px 0;}
.faq-q{display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-weight:600;color:var(--navy);font-size:15.5px;}
.faq-q .icon{color:var(--teal-dark);font-size:20px;transition:transform .2s;}
.faq-item.open .faq-q .icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;font-size:14.5px;color:var(--slate);}
.faq-item.open .faq-a{max-height:200px;padding-top:12px;}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(120deg,var(--teal-dark),var(--teal));color:var(--navy);text-align:center;padding:64px 0;}
.cta-band h2{color:var(--navy);}
.cta-band p{color:rgba(11,30,51,.75);}

/* ---------- footer ---------- */
.site-footer{background:var(--navy);color:rgba(255,255,255,.65);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;margin-bottom:44px;}
@media (max-width:820px){.footer-grid{grid-template-columns:1fr 1fr;}}
.footer-grid h4{color:#fff;font-size:14px;margin-bottom:16px;}
.footer-grid ul{list-style:none;padding:0;margin:0;}
.footer-grid li{margin-bottom:10px;font-size:14px;}
.footer-grid a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;}
.disclaimer{font-size:12.5px;color:rgba(255,255,255,.4);margin-top:8px;max-width:900px;}

/* ============================================================
   PRACTICE PAGE
   ============================================================ */
.practice-bar{background:var(--white);border-bottom:1px solid var(--border);position:sticky;top:74px;z-index:40;}
.practice-bar .container{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;}
.practice-bar .exam-title{font-weight:700;color:var(--navy);font-size:15px;}
.practice-bar .exam-title .mono{color:var(--slate);font-weight:500;font-size:13px;margin-left:8px;}
.progress-track{flex:1;max-width:360px;height:8px;background:var(--border);border-radius:99px;margin:0 24px;overflow:hidden;}
.progress-track > div{height:100%;background:var(--teal);transition:width .3s ease;}
.free-counter{font-family:"IBM Plex Mono";font-size:13px;color:var(--navy);white-space:nowrap;}
.free-counter .num{color:var(--amber);font-weight:700;}

.practice-wrap{max-width:760px;margin:0 auto;padding:48px 24px 100px;}
.q-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow-sm);}
.q-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;}
.q-meta .q-num{font-family:"IBM Plex Mono";font-size:13px;color:var(--slate);}
.q-stem{font-size:19px;font-weight:600;color:var(--navy);margin-bottom:26px;line-height:1.4;}
.opt-list{display:flex;flex-direction:column;gap:12px;margin-bottom:24px;}
.opt{
  display:flex;align-items:center;gap:13px;text-align:left;
  padding:15px 16px;border:1.5px solid var(--border);border-radius:var(--radius-sm);
  background:var(--white);cursor:pointer;font-size:15px;color:var(--ink);
  transition:border-color .15s, background .15s;
}
.opt:hover{border-color:var(--navy-lighter);}
.opt .letter{
  width:26px;height:26px;border-radius:50%;border:1.5px solid var(--border);
  display:flex;align-items:center;justify-content:center;font-size:12.5px;font-weight:700;color:var(--slate);flex:none;
}
.opt.selected{border-color:var(--navy);}
.opt.selected .letter{border-color:var(--navy);background:var(--navy);color:#fff;}
.opt.correct{border-color:var(--teal);background:rgba(20,184,166,.08);}
.opt.correct .letter{border-color:var(--teal);background:var(--teal);color:#fff;}
.opt.incorrect{border-color:var(--danger);background:rgba(225,73,61,.06);}
.opt.incorrect .letter{border-color:var(--danger);background:var(--danger);color:#fff;}
.opt[disabled]{cursor:default;}

.explain{
  background:var(--paper);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:16px 18px;font-size:14px;color:var(--slate);margin-bottom:22px;display:none;
}
.explain.show{display:block;}
.explain b{color:var(--navy);}
.q-actions{display:flex;justify-content:space-between;gap:12px;}

.score-tag{font-family:"IBM Plex Mono";font-size:13px;color:var(--slate);}
.score-tag b{color:var(--teal-dark);}

/* ---------- paywall modal ---------- */
.modal-overlay{
  position:fixed;inset:0;background:rgba(11,30,51,.72);backdrop-filter:blur(3px);
  display:flex;align-items:center;justify-content:center;z-index:100;padding:20px;
}
.modal-overlay.hidden{display:none;}
.modal{
  background:var(--navy);color:#fff;border-radius:18px;max-width:920px;width:100%;
  padding:44px;position:relative;box-shadow:0 30px 80px -20px rgba(0,0,0,.5);
  max-height:92vh;overflow-y:auto;
}
.modal-close{position:absolute;top:18px;right:20px;background:none;border:none;color:rgba(255,255,255,.5);font-size:22px;cursor:pointer;}
.modal-close:hover{color:#fff;}
.modal-head{text-align:center;max-width:520px;margin:0 auto 34px;}
.modal-head h2{color:#fff;font-size:clamp(22px,3vw,30px);}
.modal-head p{color:rgba(255,255,255,.65);}
.modal .pricing-grid{margin-top:0;}
.modal-foot{text-align:center;margin-top:26px;font-size:13px;color:rgba(255,255,255,.45);}

/* selected-plan mini confirmation */
.plan-toast{
  position:fixed;bottom:24px;right:24px;background:var(--white);color:var(--navy);
  border-radius:var(--radius-sm);box-shadow:var(--shadow);padding:16px 20px;
  display:flex;align-items:center;gap:12px;z-index:120;max-width:320px;
}
.plan-toast.hidden{display:none;}
.plan-toast .dot-ok{color:var(--teal-dark);font-size:18px;}

.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
@media (prefers-reduced-motion:reduce){*{transition:none !important;scroll-behavior:auto !important;}}