:root{color-scheme:light;--ink:#171724;--muted:#656575;--blue:#0769db;--pale:#f4f3fc;--line:#e5e5ed;--radius:28px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;font-synthesis:none}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{margin:0;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,label,a{-webkit-tap-highlight-color:transparent}
a:focus-visible,summary:focus-visible,input:focus-visible+label{outline:3px solid var(--blue);outline-offset:6px}
figure,p,h1,h2,h3{margin:0}
p{color:var(--muted);font-size:1.0625rem;line-height:1.7}
h1,h2,h3{font-weight:650;letter-spacing:-.05em;line-height:1.08}
h2{font-size:clamp(2.3rem,4.2vw,3.7rem)}
h3{font-size:2rem;letter-spacing:-.035em}
.wrap{width:min(1120px,calc(100% - 80px));margin-inline:auto}
.section-wrap{margin-top:120px}
.eyebrow{font-size:.875rem;font-weight:550;color:var(--muted);margin-bottom:24px}
.small-print{font-size:.8125rem;line-height:1.6}
.sr-only,.study-selector input{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;top:10px;left:10px;padding:14px;background:white;z-index:10;transform:translateY(-160%)}
.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;top:0;z-index:5;background:rgb(255 255 255 / .93);border-bottom:1px solid rgb(229 229 237 / .7);backdrop-filter:blur(16px)}
.nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.wordmark{font-size:1.8rem;font-weight:750;letter-spacing:-.065em;color:var(--ink);line-height:1.2}
.wordmark span{color:var(--blue)}
.nav-links{display:flex;gap:34px;margin-left:60px;font-size:.875rem;color:#535361}
.nav-links a,.legal-links a{padding-block:12px}
.nav-links a:hover,.legal-links a:hover{color:var(--blue)}
.nav-cta{font-size:.8125rem;font-weight:600;background:#f1f2f6;padding:12px 19px;border-radius:99px;white-space:nowrap}
.nav-cta span{margin-left:7px}
.hero{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:32px;padding-top:65px;padding-bottom:65px;min-height:660px}
.hero-copy{position:relative;z-index:1}
h1{font-size:clamp(3rem,5.6vw,4.7rem);letter-spacing:-.06em}
h1 span{color:var(--blue)}
.hero-description{font-size:1.1875rem;line-height:1.6;margin-top:25px}
.hero-actions{display:flex;align-items:flex-start;flex-direction:column;gap:23px;margin-top:34px}
.button{display:inline-flex;align-items:center;gap:13px;background:var(--blue);color:#fff;border-radius:99px;font-size:.875rem;font-weight:600;padding:17px 24px;transition:background .2s,transform .2s;white-space:nowrap}
.button:hover{background:#005bc4;transform:translateY(-2px)}
.button:active{transform:translateY(0)}
.button-divider{height:17px;width:1px;background:rgb(255 255 255 / .4)}
.button>span:last-child{font-weight:400}
.text-link{font-size:.875rem;padding:4px 0;color:var(--muted)}
.text-link:hover{color:var(--blue)}
.text-link span{margin-left:8px}
.hero-visual{position:relative;height:535px;isolation:isolate}
.hero-wash{position:absolute;inset:32px -18px 0 -8px;background:linear-gradient(145deg,#f9f8fd,#efedfc 65%,#edf4fe);border-radius:46% 46% 34% 34%;z-index:-1}
.phone{background:#fcfcff;border:6px solid #fdfdff;border-radius:36px;overflow:hidden;box-shadow:0 24px 55px -20px rgb(66 57 110 / .27),0 0 0 1px #e2e1eb}
.phone img{width:100%;border-radius:28px}
.hero-library{position:absolute;width:220px;left:14px;top:8px;transform:rotate(-7deg)}
.hero-note{position:absolute;width:232px;right:4px;top:55px;transform:rotate(7deg)}
.sources{text-align:center;padding:54px 24px 0;border-top:1px solid var(--line)}
.sources h2{font-size:1.75rem;letter-spacing:-.035em}
.sources>p{margin-top:17px}
.source-types{list-style:none;display:flex;justify-content:center;gap:12px 28px;flex-wrap:wrap;padding:0;margin:25px 0 18px;color:#414152;font-size:.875rem;font-weight:550}
.source-types li+li:before{content:"/";color:#b0afc0;margin-right:28px;font-weight:400}
.sources .small-print{margin-top:0}
.handwriting{background:var(--pale);overflow:hidden}
.handwriting-inner{display:grid;grid-template-columns:.9fr 1.1fr;gap:85px;align-items:center;padding-block:80px}
.handwriting-copy>p:not(.eyebrow){max-width:360px;margin-top:25px}
.handwriting-copy .secondary-copy{font-size:.9375rem}
.tablet{border:9px solid #fdfdff;border-radius:26px;overflow:hidden;box-shadow:0 25px 55px -20px rgb(66 57 110 / .23),0 0 0 1px #dfdfe8;transform:rotate(3deg)}
.tablet img{border-radius:17px}
.section-heading{text-align:center}
.section-heading h2 span{color:var(--muted)}
.section-heading p{margin-top:24px}
.study-explorer{margin-top:35px}
.study-selector{position:relative;border:0;padding:0;margin:0;min-width:0;text-align:center}
.study-selector>label{position:relative;display:inline-block;padding:13px 23px;margin:0 2px 30px;cursor:pointer;border-radius:99px;font-size:.875rem;font-weight:550;background:#f3f3f7;transition:background .2s,color .2s}
.study-selector>label:hover{background:#e9e9f2}
.study-selector input:checked+label{background:var(--ink);color:white}
.study-panels{background:#f5f6fa;border-radius:var(--radius);text-align:left;overflow:hidden}
.study-panel{display:none;grid-template-columns:1fr 1fr;gap:70px;align-items:center;padding:55px 85px 0;min-height:510px}
#view-notes:checked~.study-panels .panel-notes,#view-flashcards:checked~.study-panels .panel-flashcards,#view-quizzes:checked~.study-panels .panel-quizzes{display:grid}
.study-copy{align-self:center;padding-bottom:55px}
.study-copy p{margin-top:23px;max-width:345px}
.study-copy .study-detail{font-size:.9375rem;margin-top:25px}
.study-phone{width:245px;height:455px;justify-self:center;align-self:start}
.organize{display:grid;grid-template-columns:1.05fr 1fr;gap:100px;align-items:center}
.library-window{height:450px;border-radius:var(--radius);background:var(--pale);overflow:hidden;padding:28px 28px 0}
.library-window img{border-radius:20px;border:1px solid var(--line);box-shadow:0 20px 35px rgb(66 57 110 / .08)}
.organize-copy>p{margin-top:25px;max-width:360px}
.focus-copy{margin-top:35px;padding-top:28px;border-top:1px solid var(--line)}
.focus-copy h3{font-size:1.25rem;letter-spacing:-.025em}
.focus-copy p{font-size:.9375rem;margin-top:10px;max-width:340px}
.questions{max-width:760px}
.questions h2{font-size:clamp(2rem,3.5vw,2.8rem);margin-bottom:32px}
.questions details{border-bottom:1px solid var(--line);padding-block:19px}
.questions summary{cursor:pointer;font-weight:550;font-size:1.0625rem;line-height:1.5;padding-right:12px}
.questions summary::marker{color:var(--blue)}
.questions details p{margin-top:16px;font-size:1rem}
.download{text-align:center;padding:80px 0 65px;background:linear-gradient(180deg,#f8f8fd,#f0effa)}
.download .wordmark{margin-bottom:25px;font-size:2rem}
.download h2{font-size:clamp(2.5rem,4.5vw,4rem)}
.download h2+p{margin-top:23px}
.store-placeholder{display:inline-flex;flex-direction:column;align-items:flex-start;margin:30px 0 24px;background:var(--ink);color:#fff;border-radius:13px;padding:12px 28px}
.store-placeholder>span{font-size:.75rem;line-height:1.5}
.store-placeholder>strong{font-size:1.65rem;font-weight:550;line-height:1.2;letter-spacing:-.025em}
.footer{padding-block:32px}
.footer-row{display:flex;align-items:center;gap:25px}
.footer .wordmark{font-size:1.4rem}
.legal-links{display:flex;gap:27px;margin-left:auto;font-size:.8125rem;color:#555563}
.copyright{font-size:.75rem;color:var(--muted)}
.footer>p{font-size:.75rem;margin-top:22px}
@media(min-width:1400px){.hero{gap:70px}}
@media(max-width:1050px){.hero{gap:15px}.hero-visual{height:460px}.hero-library{width:185px;left:10px}.hero-note{width:195px;right:0}.hero-wash{inset:15px -10px 0}.handwriting-inner{gap:45px}.study-panel{padding-inline:50px;gap:35px}.organize{gap:55px}}
@media(max-width:767px){
  html{scroll-padding-top:85px}
  .wrap{width:calc(100% - 40px)}
  .section-wrap{margin-top:78px}
  .nav{height:66px;gap:15px}
  .wordmark{font-size:1.6rem}
  .nav-links{display:none}
  .nav-cta{padding:11px 16px;font-size:.75rem}
  .hero{grid-template-columns:minmax(0,1fr);text-align:center;padding:44px 0 37px;gap:38px;min-height:0}
  .hero .eyebrow{margin-bottom:18px;font-size:.8125rem}
  h1{font-size:clamp(2.9rem,10.8vw,4rem)}
  .hero-description{font-size:1.0625rem;margin-top:20px}
  .hero-actions{align-items:center;gap:16px;margin-top:25px}
  .button{padding:16px 23px;max-width:100%;white-space:normal;flex-wrap:wrap;justify-content:center}
  .hero-visual{width:min(380px,100%);height:422px;justify-self:center}
  .hero-library{width:49%;left:4%;top:5px}
  .hero-note{width:51%;right:3%;top:38px}
  .hero-wash{inset:20px -5px 0;border-radius:42% 42% 30% 30%}
  .phone{border-width:5px;border-radius:29px}
  .phone img{border-radius:23px}
  .sources{padding:38px 0 0}
  .sources h2{font-size:1.55rem}
  .sources>p{font-size:1rem}
  .desktop-break{display:none}
  .source-types{gap:14px 18px;font-size:.8125rem;max-width:290px;margin-inline:auto}
  .source-types li+li:before{display:none}
  .sources .small-print{font-size:.75rem;max-width:270px;margin-inline:auto}
  .handwriting-inner{grid-template-columns:1fr;gap:40px;padding-block:48px 55px}
  .handwriting-copy{text-align:center}
  .handwriting-copy>p:not(.eyebrow){margin-inline:auto;margin-top:20px}
  .handwriting-copy .eyebrow{margin-bottom:18px}
  h2{font-size:clamp(2.1rem,8.7vw,3rem)}
  .tablet{width:min(420px,92%);justify-self:center;border-width:7px;border-radius:23px;transform:rotate(2deg)}
  .tablet img{border-radius:16px}
  .section-heading p{margin-top:20px}
  .study-explorer{margin-top:26px}
  .study-selector>label{padding:12px 18px;margin-inline:0;margin-bottom:22px;font-size:.8125rem}
  .study-panel{grid-template-columns:1fr;gap:30px;padding:32px 27px 0;min-height:665px;text-align:center;align-content:start}
  .study-copy{padding:0}
  .study-copy h3{font-size:1.8rem}
  .study-copy p{font-size:1rem;margin:18px auto 0;max-width:360px}
  .study-copy .study-detail{font-size:.875rem;margin-top:16px}
  .study-phone{width:230px;height:365px}
  .organize{grid-template-columns:1fr;gap:35px}
  .organize-copy{grid-row:1;text-align:center}
  .organize-copy>p,.focus-copy p{margin-inline:auto}
  .focus-copy{margin-top:26px;padding-top:24px}
  .library-window{height:390px;padding:22px 22px 0}
  .download{padding:55px 0 45px}
  .download h2{font-size:2.7rem}
  .download .small-print{max-width:310px;margin-inline:auto;font-size:.75rem}
  .footer{padding-block:27px}
  .footer-row{flex-wrap:wrap;gap:18px 20px;justify-content:space-between}
  .legal-links{gap:20px;font-size:.75rem}
  .copyright{width:100%}
  .footer>p{margin-top:15px;line-height:1.65}
}
@media(max-width:374px){.hero-visual{height:355px}.hero{gap:32px}.hero-description{font-size:1rem}.study-selector>label{padding-inline:14px}.study-panel{padding-inline:20px;min-height:700px}.footer-row{gap:16px 10px}.legal-links{gap:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}
@media(prefers-reduced-transparency:reduce){.site-header{background:#fff;backdrop-filter:none}}