:root{
  --bg:#FFFBF5;
  --paper:#FFFDF8;
  --ink:#16161A;
  --ink-soft:#5A5A68;
  --muted:#9A9590;
  --line:#E8E0D5;
  --line-2:#F0E8DC;
  --card:#FFFFFF;
  --accent:#1B46E0;
  --accent-dark:#1536B0;
  --accent-soft:#EFF3FF;
  --teal:#0E7A7B;
  --teal-soft:#E6F7F7;
  --radius:18px;
  --shadow: 0 8px 30px rgba(22,22,26,.08), 0 2px 8px rgba(22,22,26,.06);
  --shadow-soft: 0 4px 16px rgba(22,22,26,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Inter,system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* NAV — less glass, more paper */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,251,245,.88);backdrop-filter:blur(8px);border-bottom:1px solid var(--line-2)}
.nav-inner{display:flex;justify-content:space-between;align-items:center;height:64px}
.brand{font-family:Fraunces,serif;font-weight:900;font-size:1.35rem;letter-spacing:-.02em;text-decoration:none;color:var(--ink)}
.brand span{color:var(--accent)}
.demo-badge{font-family:Inter,sans-serif;font-size:.62rem;font-weight:700;letter-spacing:.1em;background:var(--ink);color:#fff;padding:4px 8px;border-radius:999px;vertical-align:middle;margin-left:8px}
.nav-links{display:flex;gap:16px;align-items:center}
.nav-links a{color:var(--ink-soft);text-decoration:none;font-weight:500;font-size:.9rem}
.nav-links a:hover{color:var(--ink)}
.btn{border:none;cursor:pointer;font-family:inherit;font-weight:600;border-radius:999px;padding:10px 18px;transition:.15s}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 14px rgba(232,93,38,.25)}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-secondary{background:var(--ink);color:#fff}
.btn-secondary:hover{background:#2a2a30}
.btn-ghost{background:transparent;color:var(--ink-soft);border:1px solid var(--line)}
.btn-ghost:hover{background:var(--paper);color:var(--ink)}
.btn-lg{padding:13px 24px;font-size:1rem}
.btn-sm{padding:7px 12px;font-size:.82rem;border-radius:999px}
.btn-block{width:100%;text-align:center;display:inline-block;text-decoration:none}

/* HERO — editorial, not centered AI gradient */
.hero{padding:48px 0 36px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.eyebrow{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);display:flex;align-items:center;gap:8px;margin-bottom:14px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 6px var(--accent-soft)}
.hero h1{font-family:Fraunces,serif;font-size:clamp(2.6rem,5vw,4rem);font-weight:900;line-height:.95;letter-spacing:-.04em}
.underline{position:relative;display:inline-block}
.underline:after{content:"";position:absolute;left:-4px;right:-4px;bottom:6px;height:12px;background:#C7D7FF;z-index:-1;transform:rotate(-1deg);border-radius:4px}
.hero-sub{margin-top:14px;color:var(--ink-soft);font-size:1.05rem;max-width:520px;line-height:1.6}
.hero-cta-row{margin-top:22px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.cta-note{font-size:.82rem;color:var(--muted)}
.trust-row{margin-top:22px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:.78rem;color:var(--muted);border-top:1px dashed var(--line);padding-top:14px}
.trust-label{font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft)}
.trust-logos{font-weight:500}

/* hero visual — stacked cards, hand-rotated */
.hero-visual{position:relative;min-height:340px;display:flex;align-items:center;justify-content:center}
.stack{position:relative;width:320px;height:300px}
.stack-card{position:absolute;left:0;right:0;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow)}
.stack-card.c1{top:0;transform:rotate(-2deg);z-index:1}
.stack-card.c2{top:86px;transform:rotate(1.2deg);z-index:2}
.stack-card.c3{top:175px;transform:rotate(-0.8deg);z-index:3;border-color:var(--teal);background:linear-gradient(180deg,#fff 0%, #F6FFFE 100%)}
.sc-badge{font-size:.65rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);margin-bottom:8px}
.sc-q{font-weight:700;font-size:.92rem;line-height:1.35}
.sc-a{margin-top:8px;font-size:.82rem;color:var(--ink-soft);border-top:1px dashed var(--line);padding-top:8px}
.sc-opts{display:flex;gap:8px;margin-top:10px}
.sc-opt{font-size:.78rem;font-weight:700;padding:6px 10px;border-radius:999px;border:1px solid var(--line);background:var(--bg)}
.sc-opt.on{background:var(--teal);color:#fff;border-color:var(--teal)}

/* TOOL SECTION */
.tool-section{display:grid;grid-template-columns:minmax(0,440px) minmax(0,1fr);gap:28px;padding-bottom:48px;align-items:start}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-soft)}
.card-title{font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.count{color:var(--muted);font-weight:600;text-transform:none;letter-spacing:0}
.tabs{display:flex;gap:6px;margin-bottom:16px;flex-wrap:wrap}
.tab{flex:1;min-width:92px;border:1px solid var(--line);background:var(--paper);border-radius:999px;padding:9px 10px;font-family:inherit;font-weight:600;font-size:.82rem;cursor:pointer;color:var(--ink-soft)}
.tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.tab-panel textarea,.tab-panel input[type="url"]{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:12px;font-family:inherit;font-size:.92rem;background:var(--paper)}
.tab-panel textarea:focus,.tab-panel input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.hint{font-size:.76rem;color:var(--muted);margin-top:8px}
.dropzone{border:1.5px dashed #C8BEB0;border-radius:14px;padding:26px 16px;text-align:center;cursor:pointer;background:var(--paper);transition:.15s}
.dropzone:hover,.dropzone.dragover{border-color:var(--accent);background:var(--accent-soft)}
.dz-icon{font-size:1.5rem}
.dz-main{font-size:.9rem}
.dz-sub{font-size:.76rem;color:var(--muted);margin-top:4px}
.gen-row{display:flex;gap:10px;align-items:end;margin-top:18px;flex-wrap:wrap}
.field.inline span{display:block;font-size:.7rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:4px}
.field.inline select{padding:9px 12px;border:1px solid var(--line);border-radius:999px;font-family:inherit;font-size:.9rem;background:var(--paper)}
.demo-note{font-size:.7rem;color:var(--muted);margin-top:10px}
.output-tabs{display:flex;gap:6px;margin-bottom:14px}
.out-tab{flex:1;border:1px solid var(--line);background:var(--paper);border-radius:999px;padding:10px;font-family:inherit;font-weight:700;font-size:.82rem;cursor:pointer;color:var(--ink-soft)}
.out-tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.toolbar-label{font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.toolbar-actions{display:flex;gap:6px}
.deck{display:grid;grid-template-columns:repeat(auto-fill,minmax(236px,1fr));gap:12px}
.empty-state{text-align:center;color:var(--ink-soft);padding:32px 20px;border:1px dashed var(--line);background:var(--paper)}
.flash{border:1px solid var(--line);border-radius:16px;background:var(--card);overflow:hidden;cursor:pointer;transition:.12s}
.flash:hover{transform:translateY(-2px) rotate(.2deg);box-shadow:var(--shadow)}
.flash-inner{padding:16px;min-height:132px;display:flex;flex-direction:column}
.flash-q{font-weight:700;font-size:.88rem;line-height:1.4}
.flash-a{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);font-size:.84rem;color:var(--ink-soft)}
.flash-a.hidden{visibility:hidden}
.flash-meta{margin-top:auto;padding-top:10px;font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.quiz-list{display:flex;flex-direction:column;gap:12px}
.quiz-q{border:1px solid var(--line);border-radius:16px;background:var(--card);padding:18px}
.quiz-q-head{font-weight:700;font-size:.92rem;margin-bottom:12px}
.quiz-opts{display:flex;flex-direction:column;gap:8px}
.quiz-opt{border:1px solid var(--line);border-radius:999px;padding:10px 14px;font-size:.88rem;cursor:pointer;transition:.12s;background:var(--paper);text-align:left;width:100%;font-family:inherit}
.quiz-opt:hover{border-color:var(--ink);background:#fff}
.quiz-opt.correct{border-color:var(--teal);background:var(--teal-soft);color:var(--teal)}
.quiz-opt.wrong{border-color:#E8A0A0;background:#FFF2F2;color:#B42318}
.quiz-opt:disabled{cursor:default}
.quiz-explain{margin-top:10px;font-size:.8rem;color:var(--ink-soft);background:var(--bg);padding:10px 12px;border-radius:10px}
.score-bar{margin-top:14px;text-align:center;font-weight:800;padding:14px;background:var(--teal-soft);color:var(--teal);border-radius:12px}
.quiz-options{display:flex;flex-direction:column;gap:8px;margin-top:14px}
.quiz-feedback{margin-top:14px;padding:12px;border-radius:10px;font-size:.88rem}
.quiz-feedback.ok{background:var(--teal-soft);color:var(--teal)}
.quiz-feedback.bad{background:#FFF2F2;color:#B42318}
.notes-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;line-height:1.6;white-space:pre-wrap}
.notes-options{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:10px;padding:10px 12px;background:var(--paper);border:1px solid var(--line);border-radius:12px}
.check{display:flex;gap:6px;align-items:center;font-size:.82rem;font-weight:600;color:var(--ink-soft)}
.check input{accent-color:var(--accent)}
.notes-card h3{font-family:Fraunces,serif;font-size:1.15rem;font-weight:900;margin:14px 0 8px}
.notes-card h3:first-child{margin-top:0}
.notes-card ul{margin:8px 0 12px 18px}
.notes-card li{margin:4px 0;color:var(--ink-soft);font-size:.9rem}
.overlay{position:fixed;inset:0;background:rgba(22,22,26,.45);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:20px;z-index:100}
.overlay[hidden]{display:none !important}
.overlay-card{width:min(640px,100%)}
.overlay-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.progress{font-size:.82rem;font-weight:700;color:var(--muted)}
.study-card{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:26px;min-height:170px;display:flex;flex-direction:column;justify-content:center}
.study-q{font-family:Fraunces,serif;font-size:1.25rem;font-weight:800;line-height:1.25}
.study-a{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);font-size:.95rem;color:var(--ink-soft)}
.study-a.hidden{visibility:hidden}
.study-actions{margin-top:16px;display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.grade-row{display:flex;gap:8px}
.pricing{padding:28px 24px 48px;text-align:center}
.pricing h2{font-family:Fraunces,serif;font-size:2.2rem;font-weight:900;letter-spacing:-.03em}
.pricing-sub{color:var(--ink-soft);margin:8px 0 24px}
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;max-width:960px;margin:0 auto;text-align:left}
.price-card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px;position:relative;box-shadow:var(--shadow-soft)}
.price-card.featured{border-color:var(--ink);box-shadow:var(--shadow);transform:translateY(-2px)}
.popular{position:absolute;top:-11px;left:50%;transform:translateX(-50%) rotate(-1deg);background:var(--accent);color:#fff;font-size:.68rem;font-weight:800;letter-spacing:.08em;padding:5px 12px;border-radius:999px}
.price{font-family:Fraunces,serif;font-size:2.2rem;font-weight:900}
.price span{font-family:Inter,sans-serif;font-size:.85rem;font-weight:600;color:var(--muted)}
.save{margin-left:8px;background:var(--accent-soft);color:var(--accent);padding:3px 8px;border-radius:999px;font-size:.7rem;font-weight:800}
.price-card ul{list-style:none;margin:14px 0 18px}
.price-card li{font-size:.85rem;padding:4px 0;color:var(--ink-soft)}
.price-note{font-size:.66rem;color:var(--muted);margin-top:8px;text-align:center}
.features{padding:28px 24px 40px}
.features h2,.faq h2{font-family:Fraunces,serif;font-size:1.9rem;font-weight:900;text-align:center;margin-bottom:22px;letter-spacing:-.02em}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.feature{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px}
.feature h3{font-size:.95rem;margin-bottom:6px}
.feature p{font-size:.86rem;color:var(--ink-soft)}
.faq{padding-bottom:72px;max-width:720px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:8px;padding:14px 18px}
.faq summary{font-weight:700;cursor:pointer}
.faq p{margin-top:8px;color:var(--ink-soft);font-size:.88rem}
.faq code{background:var(--bg);padding:2px 6px;border-radius:6px;font-size:.85em}
.nav-email{font-size:.82rem;font-weight:700;color:var(--ink);margin-right:6px}
.auth-form .field{margin-bottom:12px}
.auth-form input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-family:inherit;font-size:.9rem;background:var(--paper)}
.auth-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.footer{border-top:1px solid var(--line-2);padding:22px 0;color:var(--muted);font-size:.82rem;text-align:center}
.footer a{color:var(--muted);text-decoration:none}
.footer a:hover{color:var(--ink)}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr;gap:32px}.hero-visual{display:none}.tool-section{grid-template-columns:1fr;gap:28px}.hero{padding:32px 0 28px}}
@media(max-width:640px){
  .container{padding:0 20px}
  .nav{position:sticky}
  .nav-inner{height:56px}
  .brand{font-size:1.2rem}
  .nav-links{gap:10px}
  .nav-links a{display:none}
  .hero{padding:36px 0 32px}
  .hero h1{font-size:2.15rem;line-height:1}
  .hero-sub{font-size:.95rem;margin-top:12px}
  .hero-cta-row{margin-top:20px}
  .hero-cta-row .btn{width:100%;text-align:center;justify-content:center}
  .trust-row{margin-top:18px;padding-top:14px;gap:8px}
  .eyebrow{font-size:.68rem;margin-bottom:12px}
  .tool-section{padding:0 16px 32px;gap:24px}
  .card{padding:18px;border-radius:18px}
  .ai-setup{margin:0 -2px}
  .deck{grid-template-columns:1fr;gap:14px}
  .flash-inner{padding:14px;min-height:120px}
  .tabs{overflow-x:auto;-webkit-overflow-scrolling:touch;flex-wrap:nowrap;padding-bottom:6px;gap:8px;scrollbar-width:none}
  .tabs::-webkit-scrollbar{display:none}
  .tab{flex:0 0 auto;white-space:nowrap;padding:8px 14px}
  .gen-row{flex-direction:column;align-items:stretch;gap:12px}
  .gen-row .field{width:100%}
  .gen-row .field select{width:100%}
  .gen-row .btn-lg{width:100%}
  .output-tabs{position:sticky;top:56px;z-index:5;background:var(--bg);padding:8px 0;margin:0 -4px}
  .toolbar{flex-direction:column;align-items:flex-start;gap:8px}
  .toolbar-actions{width:100%;flex-wrap:wrap}
  .pricing{padding:20px 16px 32px}
  .pricing-grid{grid-template-columns:1fr;gap:14px}
  .price-card{padding:20px}
  .price-card.featured{transform:none}
  .features{padding:20px 16px 28px}
  .feature-grid{gap:12px}
  .faq{padding:0 16px 48px}
}