/* Grow Up Curious shared base: tokens, type, header, footer, buttons, forms, shared blocks.
   Pages are generated by tools/build_site.py from pages/*.html; page-specific styles live in each page file. */
:root {
  --paper: #FFFBF3; --paper-2: #FFF4E2; --white: #FFFFFF;
  --ink: #1B2A41; --text: #2E3440; --soft: #5B6270; --line: #E6E1D6; --dot: #E8E0CF;
  --teal: #0E7C86; --teal-dark: #0A5E66; --teal-2: #2FB3A9; --teal-bg: #E6F4F3;
  --orange: #F28C28; --orange-ink: #C2560F; --orange-bg: #FDEEDF;
  --yellow: #F2C14E; --yellow-bg: #FFF6DA; --leaf: #7BD389; --red: #E63946;
  --r-sm: 8px; --r: 14px; --r-lg: 22px; --max: 1140px;
  --shadow: 0 1px 0 rgba(27,42,65,.06), 0 14px 34px -14px rgba(27,42,65,.28);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body { margin: 0; background: var(--paper); color: var(--text); font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
       font-size: 17px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; height: auto; }
a { color: var(--teal-dark); text-underline-offset: 3px; }
a:hover { color: var(--teal); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--ink); color: #fff; padding: 10px 14px; border-radius: var(--r-sm); }
.skip:focus { left: 12px; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }

/* Type scale (1.25 ratio from 17px) */
h1, h2, h3, h4 { font-family: "Poppins", system-ui, sans-serif; color: var(--ink); line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.2rem, 5.2vw, 3.6rem); font-weight: 700; letter-spacing: -.025em; line-height: 1.06; }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); font-weight: 700; letter-spacing: -.02em; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { margin: 0 0 1em; }
.lead { font-size: 1.15rem; color: var(--soft); max-width: 52ch; }
.muted { color: var(--soft); }
.small { font-size: .88rem; }

/* Breadboard dot texture: a quiet background for alternate sections */
.dots { background-color: var(--paper-2); background-image: radial-gradient(var(--dot) 1.5px, transparent 1.6px); background-size: 20px 20px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: 600 1rem/1 "Inter", system-ui, sans-serif;
       padding: 15px 22px; border-radius: 999px; text-decoration: none; border: 2px solid var(--teal); background: var(--teal); color: #fff;
       cursor: pointer; transition: background .15s, border-color .15s, color .15s, transform .15s; text-align: center; }
.btn:hover { background: var(--teal-dark); border-color: var(--teal-dark); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn-sm { padding: 11px 16px; font-size: .9rem; }
.btn[disabled] { opacity: .6; cursor: wait; }
.link-quiet { font-weight: 600; font-size: .95rem; color: var(--teal-dark); }

/* Header */
.site-header { padding: 18px 0; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-family: "Poppins", sans-serif; font-weight: 700; font-size: 1.15rem;
        color: var(--ink); text-decoration: none; white-space: nowrap; letter-spacing: -.01em; }
.logo:hover { color: var(--ink); }
.logo img { width: 34px; height: 34px; flex: none; }
.logo .line { color: var(--orange-ink); font-weight: 500; }
.site-nav { display: flex; align-items: center; gap: 6px 22px; }
.site-nav a { font-size: .95rem; font-weight: 500; color: var(--ink); text-decoration: none; white-space: nowrap; }
.site-nav a:hover, .site-nav a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; text-decoration-color: var(--orange); text-underline-offset: 6px; }
.site-nav a.nav-cta { border: 2px solid var(--ink); border-radius: 999px; padding: 7px 14px; }
.site-nav a.nav-cta:hover { background: var(--ink); color: #fff; text-decoration: none; }
@media (max-width: 760px) {
  .site-header { padding: 12px 0; }
  .wrap { padding: 0 16px; }
  .logo { font-size: 1rem; gap: 8px; } .logo img { width: 30px; height: 30px; }
  .logo .line { display: none; }
  .site-nav { gap: 14px; }
  .site-nav a { font-size: .88rem; }
  .site-nav a.nav-cta { padding: 6px 11px; }
}
@media (max-width: 480px) { .site-nav a.hide-xs { display: none; } }
@media (max-width: 360px) { .site-nav .hide-sm { display: none; } }

/* Footer */
.site-footer { background: var(--ink); color: #C9D2DE; padding: 56px 0 40px; font-size: .92rem; }
.site-footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.site-footer .brand { display: flex; align-items: center; gap: 10px; font-family: "Poppins", sans-serif; font-weight: 700; font-size: 1.1rem; color: #fff; margin-bottom: 8px; }
.site-footer .brand img { width: 30px; height: 30px; }
.site-footer h4 { color: #fff; font-size: .95rem; font-weight: 600; margin: 4px 0 10px; letter-spacing: 0; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 6px 0; }
.site-footer a { color: #fff; text-decoration: none; }
.site-footer a:hover { text-decoration: underline; color: #fff; }
.site-footer .fine { border-top: 1px solid rgba(255,255,255,.14); margin-top: 36px; padding-top: 20px; font-size: .8rem; color: #A9B4C3; line-height: 1.6; }
.site-footer .fine p { margin: 0 0 6px; }
@media (max-width: 760px) { .site-footer .cols { grid-template-columns: 1fr 1fr; } .site-footer .cols > :first-child { grid-column: 1 / -1; } }

/* Email signup (MailerLite) */
.signup-form { display: flex; gap: 10px; flex-wrap: wrap; max-width: 520px; }
.signup-form input[type=email] { flex: 1 1 230px; min-width: 0; font: 400 1rem "Inter", system-ui, sans-serif; padding: 14px 18px;
  border: 2px solid #D8D1C2; border-radius: 999px; background: #fff; color: var(--text); }
.signup-form input[type=email]:focus-visible { border-color: var(--teal); outline-offset: 1px; }
.form-msg { margin: 14px 0 0; padding: 16px 18px; border-radius: var(--r); background: var(--teal-bg); color: var(--teal-dark); max-width: 520px; }
.form-msg.error { background: #FCE4E4; color: #9B1C22; }
.form-msg strong { display: block; font-family: "Poppins", sans-serif; font-weight: 600; font-size: 1.05rem; margin-bottom: 4px; color: var(--ink); }
.form-note { margin: 10px 0 0; font-size: .82rem; color: var(--soft); max-width: 520px; }
@media (max-width: 520px) { .signup-form .btn { width: 100%; } }

/* Shared blocks */
.pill { display: inline-block; font: 600 .78rem/1 "Poppins", sans-serif; letter-spacing: .02em; padding: 7px 12px; border-radius: 999px; background: var(--orange); color: #fff; }
.pill.teal { background: var(--teal); }
.pill.soft { background: var(--yellow-bg); color: var(--ink); }
.cover { display: block; border-radius: 6px; box-shadow: var(--shadow); background: #fff; }
.price { font-family: "Poppins", sans-serif; font-weight: 700; font-size: 1.7rem; color: var(--ink); line-height: 1; }
.price s { font-family: "Inter", sans-serif; font-weight: 400; font-size: 1rem; color: var(--soft); margin-left: 6px; }
.guarantee { font-size: .86rem; color: var(--soft); margin: 12px 0 0; }
.say { position: relative; display: inline-block; background: #fff; border: 2px solid var(--ink); border-radius: 18px; padding: 10px 16px;
       font: 500 .95rem/1.4 "Poppins", sans-serif; color: var(--ink); max-width: 26ch; }
.ticks { list-style: none; padding: 0; margin: 0 0 1em; }
.ticks li { position: relative; padding-left: 30px; margin: 9px 0; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 5px; width: 18px; height: 18px; border-radius: 50%; background: var(--teal-bg); }
.ticks li::after { content: ""; position: absolute; left: 6px; top: 9px; width: 5px; height: 9px; border: solid var(--teal); border-width: 0 2px 2px 0; transform: rotate(45deg); }

/* FAQ */
.faq { max-width: 780px; margin: 0 auto; }
.faq details { border-bottom: 1.5px solid var(--line); padding: 4px 0; }
.faq summary { cursor: pointer; list-style: none; font: 600 1.05rem/1.4 "Poppins", sans-serif; color: var(--ink); padding: 16px 40px 16px 0; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 6px; top: 12px; font-size: 1.5rem; font-weight: 500; color: var(--teal); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > div { padding: 0 0 18px; color: var(--soft); max-width: 66ch; }
.faq details > div p:last-child { margin: 0; }

.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; }

/* Product pages (/circuits/spark, /circuits/coder) */
.p-hero { padding: 24px 0 72px; }
.p-hero .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.gallery .main { background: var(--paper-2); border-radius: var(--r-lg); padding: 28px; display: flex; justify-content: center; }
.gallery .main img { width: 78%; border-radius: 6px; box-shadow: var(--shadow); background: #fff; }
.gallery .thumbs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-top: 12px; }
.gallery .thumbs button { padding: 0; border: 2px solid transparent; border-radius: 8px; background: #fff; cursor: pointer; overflow: hidden; aspect-ratio: 3 / 4; }
.gallery .thumbs button[aria-pressed="true"] { border-color: var(--teal); }
.gallery .thumbs img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.p-info .pills { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.p-info h1 { margin-bottom: 8px; }
.p-info .sub { font: 500 1.2rem/1.4 "Poppins", sans-serif; color: var(--ink); margin: 0 0 16px; }
.p-info .buyrow { display: flex; align-items: center; gap: 14px 20px; flex-wrap: wrap; margin: 26px 0 8px; }
.p-info .alt { font-size: .95rem; margin: 14px 0 0; }
.facts { display: grid; grid-template-columns: auto 1fr; gap: 8px 18px; margin: 28px 0 0; padding: 20px 22px; background: #fff; border-radius: var(--r); font-size: .95rem; }
.facts dt { font-weight: 600; color: var(--ink); }
.facts dd { margin: 0; color: var(--soft); }
.missions { padding: 80px 0; }
.missions .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.mlist { list-style: none; margin: 0; padding: 0; counter-reset: m; }
.mlist li { counter-increment: m; display: grid; grid-template-columns: 48px 1fr auto; gap: 4px 16px; align-items: start; padding: 16px 0; border-top: 1.5px solid var(--line); }
.mlist li:first-child { border-top: 0; }
.mlist li::before { content: counter(m); grid-row: span 2; width: 40px; height: 40px; border-radius: 50%; background: var(--orange); color: #fff;
                    font: 700 1.05rem/40px "Poppins", sans-serif; text-align: center; }
.mlist h3 { margin: 6px 0 0; font-size: 1.12rem; }
.mlist .time { font-size: .85rem; color: var(--soft); white-space: nowrap; padding-top: 8px; }
.mlist p { grid-column: 2 / -1; margin: 0; color: var(--soft); font-size: .97rem; }
.every { background: #fff; border-radius: var(--r-lg); padding: 28px 30px; align-self: start; }
.every h3 { margin-bottom: 14px; }
.every .also { margin-top: 18px; padding-top: 16px; border-top: 1.5px solid var(--line); font-size: .95rem; color: var(--soft); }
.need { padding: 80px 0; }
.need .grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; align-items: start; }
.parts { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--r); overflow: hidden; font-size: .95rem; box-shadow: var(--shadow); }
.parts th { background: var(--ink); color: #fff; text-align: left; font: 600 .85rem "Poppins", sans-serif; padding: 11px 14px; }
.parts td { padding: 10px 14px; border-top: 1px solid var(--line); vertical-align: top; }
.parts td:last-child { text-align: right; white-space: nowrap; }
.p-bundle { padding: 0 0 88px; }
.p-bundle .box { display: grid; grid-template-columns: 220px 1fr auto; gap: 32px; align-items: center; background: var(--yellow-bg); border-radius: var(--r-lg); padding: 28px 36px; }
.p-bundle .box img { width: 100%; display: block; }
.p-bundle h2 { font-size: 1.6rem; margin-bottom: 6px; }
.p-bundle p { margin: 0; color: var(--soft); }
.p-bundle .acts { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; }
@media (max-width: 940px) {
  .p-hero .grid, .missions .grid, .need .grid { grid-template-columns: 1fr; gap: 36px; }
  .p-bundle .box { grid-template-columns: 140px 1fr; padding: 24px; }
  .p-bundle .acts { grid-column: 1 / -1; flex-direction: row; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
}
@media (max-width: 560px) {
  .p-hero { padding: 8px 0 56px; }
  .missions, .need { padding: 56px 0; }
  .gallery .main { padding: 18px; }
  .gallery .thumbs { gap: 6px; }
  .p-info .buyrow .btn { flex: 1 1 100%; }
  .facts { grid-template-columns: 1fr; gap: 2px; } .facts dd { margin-bottom: 8px; }
  .mlist li { grid-template-columns: 44px 1fr; } .mlist .time { grid-column: 2; padding-top: 0; }
  .every { padding: 22px 20px; }
  .parts { font-size: .88rem; } .parts td, .parts th { padding: 9px 10px; }
  .p-bundle .box { grid-template-columns: 1fr; } .p-bundle .box img { max-width: 220px; }
}