:root{
  /* fluid typography tokens */
  --fs-body: clamp(0.94rem, 1.6vw, 1.02rem);
  --fs-h1: clamp(2.08rem, 8.5vw, 4.8rem);
  --fs-h2: clamp(1.36rem, 4.2vw, 2.7rem);
  --bg:#f7f8fc;
  --surface:#ffffff;
  --surface-strong:#ffffff;
  --text:#080d21;
  --muted:#667085;
  --line:rgba(8,13,33,0.12);
  --accent:#6d3ff2;
  --accent-2:#0f766e;
  --accent-3:#eab308;
  --accent-soft:#eee8ff;
  --shadow:0 22px 70px rgba(8,13,33,0.12);
  --shadow-soft:0 10px 30px rgba(8,13,33,0.08);
  --radius:8px;
  --max-width:1120px;
}

[data-theme="dark"]{
  --bg:#070b1d;
  --surface:#0b1026;
  --surface-strong:#101733;
  --text:#f8fbff;
  --muted:#b8c0d9;
  --line:rgba(248,251,255,0.14);
  --accent:#8357ff;
  --accent-2:#5eead4;
  --accent-3:#facc15;
  --accent-soft:rgba(167,139,250,0.16);
  --shadow:0 22px 70px rgba(0,0,0,0.42);
  --shadow-soft:0 10px 30px rgba(0,0,0,0.28);
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{min-height:100%;overflow-x:hidden}
body{
  margin:0;
  font-size:var(--fs-body);
  font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left, rgba(109,63,242,0.16), transparent 34rem),
    linear-gradient(180deg, var(--bg), var(--surface));
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body, .site-header, .meeting-card, .feature, .hero-panel, .modal-panel{transition:background-color 180ms ease, color 180ms ease, border-color 180ms ease}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
button,input,textarea{font:inherit}
select{font:inherit}

html.reveal-ready .reveal-item{
  opacity:0;
  transform:translateY(22px);
  transition:
    opacity 620ms ease,
    transform 620ms cubic-bezier(.2,.72,.22,1);
  transition-delay:var(--reveal-delay, 0ms);
  will-change:opacity, transform;
}

html.reveal-ready .reveal-item.is-visible{
  opacity:1;
  transform:translateY(0);
}

.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 16px}
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;letter-spacing:0;color:var(--text)}
.logo-mark{width:58px;height:44px;object-fit:contain}
.logo-dark{display:none}
[data-theme="dark"] .logo-light{display:none}
[data-theme="dark"] .logo-dark{display:block}
.brand span{font-size:1.02rem}
.nav{display:none;align-items:center;gap:6px}
.nav a{
  color:var(--muted);
  text-decoration:none;
  font-size:.94rem;
  font-weight:700;
  padding:10px 12px;
  border-radius:999px;
}
.nav a:hover,.nav a:focus{color:var(--text);background:var(--accent-soft);outline:none}

.btn,.icon-btn{
  border:1px solid var(--line);
  background:var(--surface-strong);
  color:var(--text);
  cursor:pointer;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
}
.btn{border-radius:999px;padding:11px 18px;font-weight:800;gap:8px;box-shadow:0 1px 0 rgba(255,255,255,.2) inset}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.secondary{background:transparent}
.btn:hover,.icon-btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-soft)}
.btn:active,.icon-btn:active{transform:translateY(0)}
.icon-btn{width:44px;height:44px;border-radius:999px;padding:0;font-size:1.35rem;font-weight:700}
.theme-toggle .icon{width:18px;height:18px}
.theme-toggle .icon-sun circle{fill:currentColor}
.theme-toggle .icon-sun path{fill:none;stroke:currentColor}
.theme-toggle .icon-moon path{fill:currentColor;stroke:none}
.theme-toggle .icon-moon{display:none}
[data-theme="dark"] .theme-toggle .icon-sun{display:none}
[data-theme="dark"] .theme-toggle .icon-moon{display:block}

.hero{padding:56px 0 42px}
.hero-grid{display:grid;gap:28px;align-items:start}
.hero-copy,.hero-panel,.featured-book > div,.meeting-content,.book-meta,.contact-card > div{min-width:0}
.hero-copy{max-width:720px}
.eyebrow{
  margin:0 0 10px;
  color:var(--accent-2);
  font-size:.78rem;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.12em;
}
h1,h2,h3,p{overflow-wrap:break-word}
h1{
  margin:0;
  max-width:12ch;
  font-size:var(--fs-h1);
  line-height:.92;
  letter-spacing:0;
  overflow-wrap:break-word;
}
h2{margin:0;font-size:var(--fs-h2);line-height:1.04}
h3{margin:0;font-size:1.15rem;line-height:1.2}
.hero-sub{max-width:640px;margin:22px 0 0;color:var(--muted);font-size:1.12rem}
.spaced-cta{margin-top:16px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;color:var(--muted)}
.hero-metrics span{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:9px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  background:color-mix(in srgb, var(--surface-strong) 72%, transparent);
}
.hero-metrics strong{color:var(--text)}

.hero-panel{
  background:linear-gradient(145deg, var(--surface-strong), color-mix(in srgb, var(--surface) 82%, var(--accent-soft)));
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
}
.panel-top{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;border-bottom:1px solid var(--line);padding-bottom:16px}
.panel-top .logo-full{width:210px;height:auto;object-fit:contain}
.status-pill{
  display:inline-flex;
  align-items:center;
  width:max-content;
  border:1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  background:var(--accent-soft);
  color:var(--accent);
  border-radius:999px;
  padding:5px 9px;
  font-size:.76rem;
  font-weight:900;
}
.featured-book{display:grid;grid-template-columns:120px 1fr;gap:18px;align-items:center;padding:22px 0}
.featured-book h2{font-size:1.75rem;line-height:1.08}
.featured-book p:not(.eyebrow),.next-meeting p,.section-heading p,.feature p,.meeting-content p,.signup-strip p,.contact-card p{color:var(--muted)}
.featured-cover{
  max-width:120px;
  width:100%;
  height:auto;
  object-fit:cover;
  border-radius:8px;
  box-shadow:var(--shadow-soft);
}
.next-meeting{border-top:1px solid var(--line);padding-top:16px}
.next-meeting span{display:block;color:var(--muted);font-size:.86rem;font-weight:800}
.next-meeting strong{display:block;font-size:1.45rem;margin-top:2px}
.next-meeting p{margin:6px 0 0}

.section{padding:62px 0}
.section-muted{background:color-mix(in srgb, var(--surface-strong) 52%, transparent);border-block:1px solid var(--line)}
.split-section{display:grid;gap:28px}
.feature-grid{display:grid;gap:14px}
.feature{
  border:1px solid var(--line);
  background:color-mix(in srgb, var(--surface-strong) 82%, transparent);
  border-radius:var(--radius);
  padding:18px;
}
.feature-icon{display:block;color:var(--accent);font-weight:900;margin-bottom:24px}
.feature p{margin:10px 0 0}
.section-heading{max-width:720px;margin-bottom:24px}
.section-heading.compact{margin-bottom:18px}
.section-heading p{margin:12px 0 0;font-size:1.02rem}

.timeline{display:grid;gap:12px}
.meeting-card{
  display:grid;
  grid-template-columns:92px 1fr;
  gap:16px;
  padding:16px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface-strong);
  box-shadow:0 1px 0 rgba(255,255,255,.24) inset;
}
.meeting-card.is-current{border-color:color-mix(in srgb, var(--accent) 42%, var(--line));box-shadow:var(--shadow-soft)}
.meeting-date{
  min-height:92px;
  border-radius:7px;
  background:var(--text);
  color:var(--bg);
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  padding:12px;
  text-transform:uppercase;
  font-weight:900;
}
.meeting-date span{font-size:1.05rem}
.meeting-date strong{font-size:.78rem;opacity:.72}
.meeting-content{display:flex;flex-direction:column;align-items:flex-start;gap:8px}
.meeting-content p{margin:0}
.pages{font-size:.86rem;font-weight:900;color:var(--accent-2)}

.signup-strip{
  margin-top:18px;
  display:grid;
  gap:16px;
  align-items:center;
  padding:18px;
  border-radius:var(--radius);
  background:linear-gradient(135deg, var(--accent), #312e81);
  color:#fff;
  box-shadow:var(--shadow);
}
.signup-strip p{margin:6px 0 0;color:rgba(255,255,255,.78)}
.signup-strip .btn.primary{background:#fff;color:#312e81;border-color:#fff}

.carousel{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;align-items:center;gap:10px}
.carousel-track{
  display:flex;
  gap:14px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;
  padding:8px 2px 20px;
}
.carousel-track::-webkit-scrollbar{display:none}
.book{
  flex:0 0 min(78%, 300px);
  scroll-snap-align:center;
  display:grid;
  grid-template-columns:86px 1fr;
  gap:14px;
  align-items:center;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface-strong);
  padding:12px;
  min-width:0;
  transition:transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}
.book-cover{
  width:100%;
  height:128px;
  border-radius:7px;
  color:#fff;
  display:flex;
  align-items:flex-end;
  padding:10px;
  font-size:.72rem;
  line-height:1.05;
  font-weight:900;
  box-shadow:var(--shadow-soft);
  object-fit:cover;
}
.book-cover-image{display:block;padding:0}
.clean-code{background:linear-gradient(145deg,#111827,#0f766e)}
.pragmatic{background:linear-gradient(145deg,#7c2d12,#eab308)}
.atomic{background:linear-gradient(145deg,#1f2937,#f97316)}
.algorithms{background:linear-gradient(145deg,#0f172a,#2563eb)}
.tidy{background:linear-gradient(145deg,#312e81,#7c3aed)}
.solid{background:linear-gradient(145deg,#581c87,#0f766e)}
.productive{background:linear-gradient(145deg,#111827,#6d3ff2 52%,#facc15)}
.book-meta p{margin:6px 0 0;color:var(--muted);font-size:.92rem}

@media (hover:hover) and (pointer:fine){
  .book:hover,
  .book:focus-within{
    transform:scale(1.04);
    border-color:color-mix(in srgb, var(--accent) 40%, var(--line));
    box-shadow:var(--shadow-soft);
    z-index:1;
  }
}

.contact-section{padding-top:20px}
.contact-card{
  display:grid;
  gap:18px;
  align-items:center;
  padding:24px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface-strong);
}
.contact-card p{margin:8px 0 0}
.social{display:flex;gap:10px}
.social a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--text);
  text-decoration:none;
  overflow:visible;
  line-height:0;
}
.social a svg{display:block;width:22px;height:22px;overflow:visible}
.social a img{display:block;width:22px;height:22px;overflow:visible}

/* small inline icons used inside links (email) */
a img[width="18"]{display:inline-block;vertical-align:middle;margin-right:8px}

.icon-link{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;padding:4px;border-radius:6px}
.icon-link:focus{outline:3px solid color-mix(in srgb, var(--accent) 40%, transparent);outline-offset:3px}
.social a:hover,.social a:focus{background:var(--accent-soft);color:var(--accent);outline:none}

.site-footer{padding:24px 0;color:var(--muted)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-inner p{margin:0}
.footer-inner a{text-decoration:none;font-weight:900;color:var(--text)}

.consent-banner{
  position:sticky;
  top:72px;
  z-index:55;
  border-bottom:1px solid var(--line);
  background:color-mix(in srgb, var(--surface-strong) 90%, var(--bg));
}
.consent-inner{
  display:flex;
  gap:12px;
  align-items:center;
  justify-content:space-between;
  min-height:64px;
  padding-top:10px;
  padding-bottom:10px;
}
.consent-inner p{margin:0;color:var(--muted)}
.consent-actions{display:flex;gap:8px;flex-wrap:wrap}

.modal{
  position:fixed;
  inset:0;
  z-index:1000;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:16px;
  transition:opacity 180ms ease, visibility 180ms ease;
}
.modal[aria-hidden="true"]{opacity:0;visibility:hidden;pointer-events:none}
.modal[aria-hidden="false"]{opacity:1;visibility:visible}
.modal-backdrop{position:absolute;inset:0;background:rgba(17,16,14,.62);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.modal-panel{
  position:relative;
  z-index:1;
  width:min(100%, 560px);
  max-height:calc(100vh - 32px);
  overflow:auto;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface-strong);
  padding:22px;
  box-shadow:var(--shadow);
  transform:translateY(10px);
  opacity:0;
  transition:transform 220ms ease, opacity 180ms ease;
}
.modal[aria-hidden="false"] .modal-panel{transform:translateY(0);opacity:1}
.modal-close{position:absolute;right:14px;top:14px}
.modal-panel h3{font-size:1.45rem;margin:0 46px 18px 0}
.modal-panel form{display:grid;gap:12px}
.modal-panel label{display:grid;gap:7px;font-weight:800;color:var(--text)}
.modal-panel input,.modal-panel textarea,.feedback-form input,.feedback-form textarea,.feedback-form select{
  width:100%;
  border:1px solid var(--line);
  border-radius:7px;
  background:var(--surface);
  color:var(--text);
  padding:12px;
}

/* validation states */
.modal-panel input.is-invalid, .modal-panel textarea.is-invalid{
  border-color:crimson;
  box-shadow:0 0 0 4px rgba(220,20,60,0.06) inset;
}
.modal-panel input.is-valid, .modal-panel textarea.is-valid{
  border-color:var(--accent-2);
  box-shadow:0 0 0 4px rgba(94,234,212,0.06) inset;
}
.check-label.invalid{color:crimson}
.check-label.invalid input{outline:2px solid rgba(220,20,60,0.12)}
.modal-panel textarea{resize:vertical;min-height:90px}
.check-label{grid-template-columns:auto 1fr;align-items:start;font-weight:700;color:var(--muted)}
.check-label input{width:auto;margin-top:4px}
#signup-result{
  display:none;
  padding:11px 12px;
  border-radius:7px;
  background:var(--accent-soft);
  border-left:4px solid var(--accent);
}
.signup-link{
  display:grid;
  gap:10px;
  padding:12px;
  border:1px solid var(--line);
  border-radius:7px;
  background:var(--surface);
}
.signup-link p{margin:0}
.signup-link a{color:var(--accent);font-weight:900;text-decoration:none}

/* FAQ details/summary styling */
.faq-list{display:grid;gap:12px;margin-top:12px}
.faq-list details{border:1px solid var(--line);background:var(--surface-strong);padding:14px;border-radius:8px}
.faq-list summary{font-weight:800;cursor:pointer;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list details[open]{box-shadow:var(--shadow-soft)}

.sticky-cta{position:fixed;left:16px;right:16px;bottom:16px;z-index:60;display:none}
.sticky-cta .btn{width:100%;box-shadow:var(--shadow)}

:focus-visible{outline:3px solid color-mix(in srgb, var(--accent) 34%, transparent);outline-offset:3px}

/* visually hidden but accessible to screen readers */
.sr-only{position:absolute !important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.feedback-hero{padding-top:54px}
.feedback-layout{display:grid;gap:28px;align-items:start}
.feedback-copy h1{max-width:13ch}
.feedback-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:24px;
}
.feedback-points span{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:8px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  background:color-mix(in srgb, var(--surface-strong) 78%, transparent);
  color:var(--muted);
  font-weight:800;
}
.feedback-form{
  display:grid;
  gap:18px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface-strong);
  padding:18px;
  box-shadow:var(--shadow);
}
.form-section{
  display:grid;
  gap:12px;
  padding-bottom:18px;
  border-bottom:1px solid var(--line);
}
.form-section:last-of-type{border-bottom:0;padding-bottom:0}
.feedback-form h2{font-size:1.15rem}
.feedback-form label{display:grid;gap:7px;font-weight:800;color:var(--text)}
.feedback-form textarea{resize:vertical;min-height:104px}
.feedback-form fieldset{
  margin:0;
  padding:0;
  border:0;
  display:grid;
  gap:10px;
}
.feedback-form legend{
  padding:0;
  font-weight:800;
  color:var(--text);
}
.radio-grid,.check-grid{display:grid;gap:8px}
.radio-grid label,.check-grid label{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:start;
  gap:9px;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:7px;
  background:var(--surface);
  color:var(--muted);
}
.radio-grid input,.check-grid input{width:auto;margin-top:4px}
.thanks-page{
  max-width:720px;
  margin:0 auto;
  padding-top:4rem;
  padding-bottom:4rem;
}
.thanks-page.centered{text-align:center}
.thanks-page h1{max-width:14ch}
.thanks-page.centered h1{margin-right:auto;margin-left:auto}
.thanks-page p{color:var(--muted)}

@media (min-width:760px){
  .nav{display:flex}
  .hero{padding:84px 0 64px}
  .hero-grid{grid-template-columns:minmax(0,1.15fr) minmax(340px,.85fr);gap:40px;align-items:start}
  .split-section{grid-template-columns:.68fr 1.32fr;align-items:start}
  .feature-grid{grid-template-columns:repeat(3,1fr)}
  .meeting-card{grid-template-columns:112px 1fr;padding:18px}
  .signup-strip{grid-template-columns:1fr auto;padding:22px 24px}
  .contact-card{grid-template-columns:1fr auto}
  .book{flex-basis:320px}
  .feedback-layout{grid-template-columns:minmax(0,.92fr) minmax(420px,1.08fr);gap:40px}
  .feedback-form{padding:22px}
  .radio-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* Tablet-specific: give the hero copy more space and a larger gap to avoid overlap */
@media (max-width:759px){
  /* stack into one column on narrow tablets so the aside moves below the hero copy */
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero-copy{min-width:0}
  .hero-panel{margin-top:6px}
  h1{max-width:18ch}
}

@media (max-width:640px){
  .container{padding-inline:12px}
  .header-inner{min-height:64px;gap:10px}
  .brand span{display:none}
  .hero{padding-top:38px}
  h1{max-width:12ch;font-size:2.35rem;line-height:1}
  h2{font-size:1.78rem;line-height:1.1}
  .hero-sub{font-size:1rem;margin-top:16px}
  .hero-actions{margin-top:22px}
  .hero-metrics{display:grid;grid-template-columns:1fr;gap:8px}
  .hero-metrics span{justify-content:center;text-align:center;padding:8px 10px;font-size:.9rem}
  .hero-actions .btn{width:100%}
  .panel-top{display:grid;grid-template-columns:1fr;align-items:center}
  .panel-top .logo-full{width:168px}
  .status-pill{width:auto;max-width:100%;white-space:normal}
  .featured-book{grid-template-columns:1fr;gap:14px}
  .featured-book h2{font-size:1.36rem}
  .book-spine{min-height:88px;align-items:center}
  .book-spine span{writing-mode:horizontal-tb;transform:none}
  .section{padding:46px 0}
  .feature{padding:16px}
  .meeting-card{grid-template-columns:1fr}
  .meeting-date{min-height:auto;flex-direction:row;align-items:center}
  .signup-strip .btn{width:100%}
  .carousel{grid-template-columns:1fr;position:relative}
  .carousel-track{padding-inline:0}
  .carousel .icon-btn{position:absolute;top:50%;transform:translateY(-50%);width:36px;height:36px;z-index:2;background:color-mix(in srgb, var(--surface-strong) 92%, transparent)}
  .carousel .icon-btn:hover{transform:translateY(-50%)}
  .carousel-btn.prev{left:4px}
  .carousel-btn.next{right:4px}
  .book{grid-template-columns:72px minmax(0,1fr);flex:0 0 calc(100% - 44px);padding:10px;margin-inline:22px}
  .book-cover{height:112px}
  .contact-card{padding:18px}
  .consent-banner{top:64px}
  .consent-inner{display:grid;justify-items:start}
  .modal{padding:10px}
  .modal-panel{padding:18px}
  .modal-panel h3{font-size:1.25rem;margin-right:42px}
  .sticky-cta{display:flex}
  .feedback-hero{padding-top:38px}
  .feedback-copy h1,.thanks-page h1{max-width:16ch}
}

@media (max-width:420px){
  .container{padding-inline:10px}
  .hero{padding-top:30px}
  h1{font-size:2.08rem}
  h2{font-size:1.55rem}
  .hero-panel{padding:14px}
  .meeting-card{padding:14px}
  .book{grid-template-columns:64px minmax(0,1fr);flex-basis:calc(100% - 36px);margin-inline:18px}
  .book-cover{height:100px;padding:8px}
  .footer-inner{display:grid;justify-items:start}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;transition:none!important}
  html.reveal-ready .reveal-item{
    opacity:1!important;
    transform:none!important;
  }
}