/* ==========================================================
   Kerassentials — main.css
   Variables and critical above-the-fold styles are inlined in index.html
   ========================================================== */

/* ===== Sections & shared ===== */
.section{padding:64px 0;position:relative}
.section-bg{background:linear-gradient(180deg,var(--teal-bg) 0%,#f5fbf9 100%)}
.section-head{text-align:center;max-width:760px;margin:0 auto 40px}
.section-head h2{font-size:clamp(1.75rem,3.2vw,2.2rem);margin-bottom:14px}
.section-lead{font-size:16.5px;color:var(--ink-soft);line-height:1.7}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:10px}

/* ===== Trust strip ===== */
.trust-strip{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0}
.trust-grid{display:flex;justify-content:space-around;align-items:center;flex-wrap:wrap;gap:18px}
.trust-item{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:600;color:var(--ink-soft)}
.trust-emoji{font-size:20px}

/* ===== Two column layouts ===== */
.two-col{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:center}
.two-col-reverse{grid-template-columns:1.2fr 1fr}
.two-col-img{text-align:center}
.two-col-img img{margin:0 auto;filter:drop-shadow(0 12px 24px rgba(15,76,74,.14))}
.two-col-img-small img{max-width:260px}
.two-col:has(.two-col-img-small){grid-template-columns:.8fr 1.4fr}
.check-list{list-style:none;margin-top:20px}
.check-list li{display:flex;align-items:flex-start;gap:12px;padding:10px 0;font-size:15.5px;color:var(--ink)}
.check-list strong{color:var(--teal-deep)}

/* ===== AI Answer Block (highlighted callouts) ===== */
.ai-block{background:linear-gradient(135deg,#e8f4f2 0%,#d8ece9 100%);border-left:4px solid var(--teal);padding:22px 26px;border-radius:0 12px 12px 0;margin:0 0 30px;max-width:820px;box-shadow:var(--shadow-sm)}
.ai-block h3{font-size:18px;color:var(--teal-deep);margin-bottom:8px;font-family:'Fraunces',serif}
.ai-block p{font-size:15.5px;color:var(--ink-soft);line-height:1.7;margin:0}
.ai-block-dark{background:rgba(255,255,255,.06);border-left:4px solid var(--gold-light)}
.ai-block-dark h3{color:#fff}
.ai-block-dark p{color:rgba(255,255,255,.85)}

/* ===== Dark section (Problem) ===== */
.dark-section{background:linear-gradient(135deg,var(--teal-deep) 0%,#0a3331 100%);color:#fff}
.dark-heading{color:#fff;text-align:center;font-size:clamp(1.75rem,3.2vw,2.2rem);margin:30px 0 36px}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.pain-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);padding:24px 22px;border-radius:14px;transition:transform .2s ease,border-color .2s ease}
.pain-card:hover{transform:translateY(-4px);border-color:rgba(230,184,112,.4)}
.pain-num{font-family:'Fraunces',serif;font-size:32px;font-weight:900;color:var(--gold-light);margin-bottom:10px;letter-spacing:-.02em}
.pain-card h4{color:#fff;font-size:18px;margin-bottom:9px}
.pain-card p{font-size:14.5px;color:rgba(255,255,255,.75);line-height:1.6}

/* ===== Mechanism grid (How It Works) ===== */
.mech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:30px}
.mech-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px 24px;transition:box-shadow .2s ease,transform .15s ease}
.mech-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.mech-num{width:38px;height:38px;background:linear-gradient(135deg,var(--teal) 0%,var(--teal-light) 100%);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-family:'Fraunces',serif;font-size:18px;margin-bottom:14px}
.mech-card h4{font-size:18px;margin-bottom:8px;color:var(--teal-deep)}
.mech-card p{font-size:14.5px;color:var(--ink-soft);line-height:1.65}

/* ===== Unique badge ===== */
.unique-badge{display:inline-block;background:linear-gradient(135deg,var(--gold) 0%,#b8842a 100%);color:#fff;padding:6px 16px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;box-shadow:0 4px 12px rgba(200,151,59,.3)}

/* ===== SVG diagram wrap ===== */
.diagram-wrap{background:#fff;padding:30px;border-radius:18px;box-shadow:var(--shadow-md);border:1px solid var(--line);max-width:880px;margin:0 auto}
.diagram-wrap svg{width:100%;height:auto}

/* ===== Pricing ===== */
.pricing-grid{display:grid;grid-template-columns:1fr 1.08fr 1fr;gap:22px;align-items:stretch;margin-bottom:50px}
.price-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px 26px 28px;text-align:center;position:relative;transition:transform .2s ease,box-shadow .2s ease;display:flex;flex-direction:column}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.price-best{border:2px solid var(--gold);transform:scale(1.05);box-shadow:var(--shadow-lg);background:linear-gradient(180deg,#fff 0%,#fffdf6 100%)}
.price-best:hover{transform:scale(1.05) translateY(-4px)}
.best-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--gold) 0%,#b8842a 100%);color:#fff;padding:6px 18px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.05em;box-shadow:0 4px 12px rgba(200,151,59,.4);white-space:nowrap}
.price-tier{font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);margin-bottom:6px}
.price-card h3{font-size:24px;margin-bottom:4px}
.supply{font-size:13px;color:var(--muted);margin-bottom:18px}
.price-img-wrap{margin:8px 0 18px;min-height:230px;display:flex;align-items:center;justify-content:center}
.price-img-wrap img{max-height:230px;object-fit:contain}
.price-best .price-img-wrap{min-height:250px}
.price-best .price-img-wrap img{max-height:250px}
.price-main{display:flex;align-items:baseline;justify-content:center;gap:6px;margin-bottom:6px}
.price-num{font-family:'Fraunces',serif;font-size:42px;font-weight:900;color:var(--teal-deep);letter-spacing:-.02em}
.price-unit{font-size:13px;color:var(--muted)}
.price-total{font-size:14px;color:var(--ink-soft);margin-bottom:4px}
.price-total strong{color:var(--teal-deep);font-size:16px}
.price-ship{font-size:13px;color:var(--teal);font-weight:600;margin-bottom:16px}
.price-feats{list-style:none;text-align:left;margin-bottom:22px;flex-grow:1}
.price-feats li{padding:5px 0;font-size:13.5px;color:var(--ink-soft);padding-left:22px;position:relative}
.price-feats li::before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:700}
.price-btn{display:block;width:100%}

/* Bonus cards under pricing */
.bonus-head{text-align:center;margin:30px 0 26px}
.bonus-head h3{font-size:22px;margin-bottom:6px}
.bonus-head p{color:var(--ink-soft);font-size:15px}
.bonus-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.bonus-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;text-align:center;box-shadow:var(--shadow-sm)}
.bonus-card img{max-width:200px;margin:0 auto 14px;border-radius:6px}
.bonus-tag{display:inline-block;background:#fef3e0;color:#a8731f;padding:3px 10px;border-radius:999px;font-size:11px;font-weight:700;letter-spacing:.08em;margin-bottom:8px}
.bonus-card h4{font-size:17px;margin-bottom:8px;color:var(--teal-deep)}
.bonus-card p{font-size:14px;color:var(--ink-soft);margin-bottom:12px;line-height:1.55}
.rrp{display:inline-block;font-size:13px;font-weight:600;color:var(--gold);background:#fef9ed;padding:4px 12px;border-radius:6px}

/* ===== Ingredients grid ===== */
.ing-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ing-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 20px;transition:transform .2s ease,box-shadow .2s ease;position:relative}
.ing-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.ing-icon{font-size:30px;margin-bottom:10px}
.ing-tag{display:inline-block;background:var(--teal-bg);color:var(--teal-deep);padding:3px 10px;border-radius:999px;font-size:11px;font-weight:600;letter-spacing:.04em;margin-bottom:8px;text-transform:uppercase}
.ing-card h4{font-size:17px;margin-bottom:7px}
.ing-card p{font-size:14px;color:var(--ink-soft);line-height:1.6}

/* ===== Benefits grid ===== */
.ben-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ben-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px 20px;text-align:center;transition:transform .2s ease,box-shadow .2s ease}
.ben-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.ben-emoji{font-size:32px;margin-bottom:10px}
.ben-card h4{font-size:16px;margin-bottom:6px;color:var(--teal-deep)}
.ben-card p{font-size:13.5px;color:var(--ink-soft);line-height:1.55}

/* ===== Common Mistakes grid ===== */
.mistake-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:1000px;margin:0 auto}
.mistake-card{background:#fff;border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:12px;padding:24px;display:flex;gap:18px;align-items:flex-start;transition:transform .2s ease,box-shadow .2s ease}
.mistake-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.mistake-num{flex-shrink:0;width:48px;height:48px;background:linear-gradient(135deg,var(--gold) 0%,#b8842a 100%);color:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;font-family:'Fraunces',serif;font-weight:900;font-size:18px;letter-spacing:-.02em}
.mistake-content h4{font-size:17px;margin-bottom:8px;color:var(--teal-deep)}
.mistake-content p{font-size:14.5px;color:var(--ink-soft);line-height:1.6}

/* ===== Theme review cards (aggregate feedback) ===== */
.rev-theme{background:linear-gradient(180deg,#fdfaf3 0%,#fef9ed 100%);border-left:4px solid var(--gold)}
.theme-icon{width:54px;height:54px;background:linear-gradient(135deg,var(--teal) 0%,var(--teal-deep) 100%);border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'Fraunces',serif;font-size:20px;font-weight:700;color:#fff;letter-spacing:.04em;border:2px solid var(--gold-light);box-shadow:0 4px 10px rgba(15,76,74,.18)}
.rev-badge-theme{background:#fef3e0;color:#8a5e1a}

/* ===== Final CTA image ===== */
.final-cta-img{margin:20px auto 28px;max-width:340px}
.final-cta-img img{width:100%;height:auto;filter:drop-shadow(0 12px 28px rgba(0,0,0,.35))}

/* ===== Minimal footer disclosure ===== */
.minimal-disclosure{font-size:11.5px !important;color:#5d6968 !important;margin-top:14px !important;font-style:italic;opacity:.75}

/* ===== Comparison table ===== */
.comp-wrap{overflow-x:auto;border-radius:14px;box-shadow:var(--shadow-md);background:#fff;border:1px solid var(--line)}
.comp-table{width:100%;border-collapse:collapse;min-width:720px}
.comp-table th,.comp-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px}
.comp-table th{background:var(--teal-deep);color:#fff;font-weight:600;font-size:13px;letter-spacing:.02em;text-transform:uppercase}
.comp-table .th-highlight{background:var(--gold)}
.comp-table .td-highlight{background:#fffdf6;color:var(--teal-deep);font-weight:600}
.comp-table td:first-child{font-weight:600;color:var(--ink)}
.comp-note{text-align:center;margin-top:22px;font-size:13.5px;color:var(--muted);font-style:italic}

/* ===== Reviews ===== */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rev-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:var(--shadow-sm)}
.rev-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.rev-head img{width:54px;height:54px;border-radius:50%;object-fit:cover;border:2px solid var(--teal-bg)}
.rev-head h4{font-size:16px;margin:0;color:var(--teal-deep);font-family:'Inter',sans-serif;font-weight:700}
.rev-loc{font-size:13px;color:var(--muted)}
.rev-stars{color:var(--gold);font-size:16px;letter-spacing:2px;margin-bottom:10px}
.rev-card p{font-size:14.5px;color:var(--ink);line-height:1.6;margin-bottom:14px;font-style:italic}
.rev-badge{display:inline-block;background:#e8f4f2;color:var(--teal-deep);padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600}
.rev-note{text-align:center;margin-top:26px;font-size:13.5px;color:var(--muted);font-style:italic}

/* ===== Guarantee block ===== */
.guarantee-wrap{display:grid;grid-template-columns:240px 1fr;gap:42px;align-items:center;background:#fff;padding:38px;border-radius:18px;box-shadow:var(--shadow-md);border:1px solid var(--line)}
.guarantee-seal{width:220px;height:220px;border-radius:50%;background:conic-gradient(from 0deg,var(--gold) 0deg,#b8842a 90deg,var(--gold) 180deg,#b8842a 270deg,var(--gold) 360deg);display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;text-align:center;box-shadow:inset 0 0 0 8px rgba(255,255,255,.25),0 12px 30px rgba(200,151,59,.35);position:relative;margin:0 auto}
.guarantee-seal::after{content:"";position:absolute;inset:14px;border:2px dashed rgba(255,255,255,.4);border-radius:50%}
.seal-num{font-family:'Fraunces',serif;font-size:64px;font-weight:900;line-height:1;letter-spacing:-.03em}
.seal-text{font-size:13px;font-weight:700;letter-spacing:.1em;margin-top:6px}
.guarantee-content h2{font-size:clamp(1.4rem,2.6vw,1.8rem);margin-bottom:14px}
.guarantee-content p{margin-bottom:14px;color:var(--ink-soft);font-size:15.5px}

/* ===== Contraindications ===== */
.contra-list{list-style:none;max-width:780px;margin:0 auto}
.contra-list li{display:flex;align-items:flex-start;gap:14px;padding:18px 22px;background:#fff;border:1px solid var(--line);border-left:4px solid #d04848;border-radius:10px;margin-bottom:12px;font-size:15px;color:var(--ink)}
.x-icon{flex-shrink:0;width:26px;height:26px;background:#d04848;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;margin-top:1px}
.contra-list strong{color:var(--teal-deep)}

/* ===== FAQ accordion ===== */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:box-shadow .2s ease}
.faq-item[open]{box-shadow:var(--shadow-md)}
.faq-item summary{padding:18px 22px;font-weight:600;font-size:15.5px;color:var(--teal-deep);cursor:pointer;display:flex;justify-content:space-between;align-items:center;list-style:none;font-family:'Inter',sans-serif}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:24px;color:var(--gold);font-weight:300;transition:transform .2s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 22px 20px;color:var(--ink-soft);font-size:14.5px;line-height:1.7}

/* ===== Editorial card ===== */
.editorial-card{max-width:820px;margin:0 auto;background:#fff;border:1px solid var(--line);border-left:4px solid var(--teal);border-radius:12px;padding:30px 32px;box-shadow:var(--shadow-sm)}
.editorial-card h3{font-size:22px;margin-bottom:14px;color:var(--teal-deep)}
.editorial-card p{font-size:15px;color:var(--ink-soft);line-height:1.7;margin-bottom:12px}
.ed-meta{font-size:13px !important;color:var(--muted) !important;border-top:1px solid var(--line);padding-top:14px;margin-top:14px !important}

/* ===== References ===== */
.ref-list{max-width:820px;margin:0 auto;padding-left:24px}
.ref-list li{padding:10px 0;font-size:14px;color:var(--ink-soft);line-height:1.6;border-bottom:1px solid var(--line)}
.ref-list li:last-child{border-bottom:none}
.ref-list em{color:var(--teal-deep);font-style:italic}
.ref-list a{color:var(--teal);font-weight:600;font-size:13px;margin-left:6px;white-space:nowrap}
.ref-list a:hover{text-decoration:underline}

/* ===== Final CTA ===== */
.final-cta{background:linear-gradient(135deg,var(--teal-deep) 0%,#0a3331 100%);color:#fff;text-align:center;padding:64px 0}
.final-cta h2{color:#fff;font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:14px}
.final-cta p{font-size:17px;color:rgba(255,255,255,.85);margin-bottom:28px}
.btn-large{font-size:17px;padding:16px 36px}

/* ===== Footer ===== */
footer{background:#0a1f1e;color:#cbd5d3;padding:54px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:36px;margin-bottom:36px}
.brand-footer{color:#fff;margin-bottom:14px}
.brand-footer .brand-dot{background:linear-gradient(135deg,var(--teal-light) 0%,var(--teal) 100%)}
.footer-text{font-size:14px;line-height:1.6;color:#9ba9a7}
footer h5{color:#fff;font-size:15px;font-family:'Inter',sans-serif;font-weight:600;margin-bottom:14px;letter-spacing:.02em}
footer ul{list-style:none}
footer ul li{padding:5px 0;font-size:14px;color:#9ba9a7;line-height:1.5}
footer ul li a{color:#9ba9a7;transition:color .2s ease}
footer ul li a:hover{color:var(--gold-light)}
.footer-disclaimer{border-top:1px solid #1f3735;padding-top:24px;font-size:12.5px;color:#7a8786;line-height:1.65}
.footer-disclaimer p{margin-bottom:10px}
.footer-disclaimer strong{color:#cbd5d3}
.copyright{margin-top:18px;font-size:12px;color:#5d6968 !important}

/* ===== Mobile sticky CTA bar ===== */
.mobile-cta-bar{display:none;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);padding:12px 16px;box-shadow:0 -4px 16px rgba(15,76,74,.1);z-index:300}
.mobile-cta-bar .btn{display:block;width:100%}

/* ===== Slide-in popup ===== */
.popup{position:fixed;bottom:20px;left:20px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 44px 16px 18px;box-shadow:var(--shadow-lg);max-width:320px;display:flex;align-items:center;gap:14px;transform:translateX(-400px);transition:transform .4s cubic-bezier(.2,.8,.2,1);z-index:250}
.popup-show{transform:translateX(0)}
.popup-icon{font-size:28px;flex-shrink:0}
.popup-content{display:flex;flex-direction:column;gap:2px}
.popup-content strong{font-size:14.5px;color:var(--teal-deep);font-family:'Inter',sans-serif;font-weight:700}
.popup-content span{font-size:12.5px;color:var(--ink-soft);line-height:1.4}
.popup-content a{font-size:12.5px;color:var(--gold);font-weight:600;margin-top:4px}
.popup-close{position:absolute;top:6px;right:8px;background:transparent;border:none;font-size:22px;color:var(--muted);cursor:pointer;line-height:1;padding:4px 8px;border-radius:50%;transition:background .15s ease}
.popup-close:hover{background:var(--teal-bg);color:var(--teal-deep)}

/* ===== Responsive (900px) ===== */
@media (max-width:900px){
  .section{padding:48px 0}
  .two-col,.two-col-reverse{grid-template-columns:1fr;gap:28px}
  .two-col-img{order:-1}
  .two-col-img img{max-width:280px}
  .pain-grid,.mech-grid,.ing-grid,.ben-grid,.rev-grid,.bonus-grid{grid-template-columns:repeat(2,1fr)}
  .pricing-grid{grid-template-columns:1fr;gap:30px}
  .price-best{transform:none;order:-1}
  .price-best:hover{transform:translateY(-4px)}
  .guarantee-wrap{grid-template-columns:1fr;text-align:center;gap:24px;padding:28px}
  .guarantee-seal{margin:0 auto}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .mistake-grid{grid-template-columns:1fr;gap:14px}
  .mistake-card{padding:20px}
  .mobile-cta-bar{display:block}
  body{padding-bottom:80px}
  .trust-grid{justify-content:center;gap:14px 22px}
  .popup{max-width:calc(100% - 32px);left:16px;right:16px;bottom:80px;transform:translateY(200px)}
  .popup-show{transform:translateY(0)}
}

/* ===== Responsive (560px) ===== */
@media (max-width:560px){
  .container{padding:0 18px}
  .section{padding:38px 0}
  .pain-grid,.mech-grid,.ing-grid,.ben-grid,.rev-grid,.bonus-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;text-align:center}
  .brand-footer{justify-content:center}
  .section-head h2{font-size:1.6rem}
  .guarantee-seal{width:180px;height:180px}
  .seal-num{font-size:52px}
  .price-card{padding:26px 22px}
  .price-num{font-size:36px}
  .comp-table{font-size:13px}
  .comp-table th,.comp-table td{padding:10px 12px}
  .ai-block{padding:18px 20px}
  .editorial-card{padding:22px 20px}
  .faq-item summary{padding:16px 18px;font-size:14.5px}
  .faq-item p{padding:0 18px 18px;font-size:14px}
}