/* ER4Kids — shared stylesheet. Brand colors as CSS variables for easy theming. */
:root{
  --brand:#2EA8E8;          /* ER4Kids light blue */
  --brand-dark:#1883C4;
  --brand-darker:#0F639B;
  --brand-deep:#0A4A77;
  --brand-light:#E9F6FE;
  --accent:#FFB020;         /* warm amber */
  --accent-dark:#E08E00;
  --coral:#FF6B6B;
  --teal:#2BB5A0;
  --purple:#9B7EDE;
  --green:#43B66A;
  --ink:#1E2A32;
  --muted:#5B6B75;
  --bg:#ffffff;
  --bg-soft:#F4FAFE;
  --line:#D8E9F5;
  --danger:#c0392b;
  --danger-bg:#fdecea;
  --ok:#1e7e34;
  --radius:14px;
  --maxw:1080px;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);line-height:1.65;background:var(--bg);font-size:17px}
img{max-width:100%;height:auto}
a{color:var(--brand-dark)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* Header — dark so the black-background logo sits naturally */
.site-header{background:var(--brand-deep);border-bottom:1px solid rgba(255,255,255,.12);position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;font-weight:800;font-size:1.35rem}
.logo-badge{background:transparent;border-radius:12px;padding:0;display:inline-flex;line-height:0}
.logo-badge img{height:38px;width:38px;display:block;border-radius:8px}
.main-nav{display:flex;gap:4px;align-items:center}
.main-nav a{text-decoration:none;color:#dceeed;font-weight:600;padding:8px 12px;border-radius:8px;font-size:.95rem}
.main-nav a:hover{background:rgba(255,255,255,.14);color:#fff}
.main-nav a.cta{background:var(--accent);color:#3a2a05}
.main-nav a.cta:hover{background:var(--accent-dark);color:#fff}
@media(max-width:720px){.main-nav a{padding:8px 7px;font-size:.85rem}.brand{font-size:1.1rem}}

/* Hero */
.hero{background:
  radial-gradient(620px 300px at 88% 8%, rgba(255,255,255,.28), transparent 60%),
  radial-gradient(520px 280px at 8% 92%, rgba(255,255,255,.16), transparent 60%),
  linear-gradient(135deg,#5BC0F5 0%,#2EA8E8 45%,#1883C4 100%);
  color:#fff;padding:64px 0 56px}
.hero h1{font-size:2.4rem;line-height:1.2;margin:0 0 14px;max-width:640px}
.hero p.lede{font-size:1.15rem;max-width:640px;opacity:.96;margin:0 0 8px}
.hero .sub{max-width:640px;opacity:.9;margin:0 0 26px}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.btn{display:inline-block;text-decoration:none;font-weight:700;padding:13px 22px;border-radius:10px;border:2px solid transparent;cursor:pointer;font-size:1rem}
.btn-light{background:#fff;color:var(--brand-darker)}
.btn-light:hover{background:var(--brand-light)}
.btn-accent{background:var(--accent);color:#3a2a05}
.btn-accent:hover{background:var(--accent-dark);color:#fff}
.btn-outline{border-color:#fff;color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.15)}
.btn-brand{background:var(--brand-darker);color:#fff}
.btn-brand:hover{background:var(--brand-deep)}
.hero-note{margin-top:18px;font-size:.9rem;opacity:.85}
.hero-grid{display:flex;gap:44px;align-items:center}
.hero-copy{flex:1 1 480px;min-width:0}
.hero-visual{flex:0 0 280px;margin:0;text-align:center}
.hero-visual img{border-radius:22px;border:5px solid rgba(255,255,255,.55);box-shadow:0 18px 44px rgba(0,45,80,.35);width:100%;height:auto;display:block}
.hero-visual figcaption{margin-top:12px;color:#fff;font-size:1rem;line-height:1.4}
.hero-visual figcaption span{display:block;font-size:.85rem;opacity:.85;margin-top:2px}
.stars{color:#FFC531;letter-spacing:2px;font-size:1.05em}
@media(max-width:860px){.hero-grid{flex-direction:column;gap:28px}.hero-visual{flex-basis:auto;max-width:230px}}

/* Trust strip */
.trust{background:var(--brand-darker);color:#fff;padding:14px 0;font-size:.95rem}
.trust .wrap{display:flex;gap:26px;flex-wrap:wrap;align-items:center}
.trust strong{color:var(--accent)}

/* Sections */
.section{padding:52px 0}
.section.soft{background:var(--bg-soft)}
.section h2{font-size:1.7rem;margin:0 0 8px;color:var(--brand-darker)}
.section .kicker{color:var(--brand-dark);font-weight:700;text-transform:uppercase;letter-spacing:.06em;font-size:.8rem;margin:0 0 6px}
.center{text-align:center}
.center p{max-width:720px;margin-left:auto;margin-right:auto}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;margin-top:26px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-decoration:none;color:var(--ink);display:block;transition:transform .12s ease,box-shadow .12s ease}
a.card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(10,95,107,.12)}
.card h3{margin:0 0 8px;font-size:1.1rem;color:var(--brand-darker)}
.card p{margin:0;color:var(--muted);font-size:.95rem}
.card .go{color:var(--brand-dark);font-weight:700;font-size:.9rem;margin-top:10px;display:inline-block}

/* Feature list */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-top:26px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.feature h3{margin:0 0 8px;color:var(--brand-darker);font-size:1.05rem}
.feature p{margin:0;color:var(--muted);font-size:.95rem}

/* Article typography */
.article{max-width:780px;margin:0 auto;padding:40px 20px 20px}
.article h1{font-size:2.1rem;line-height:1.25;color:var(--brand-darker);margin:0 0 10px}
.article .byline{color:var(--muted);font-size:.92rem;margin:0 0 6px}
.article .byline strong{color:var(--ink)}
.article .byline a{color:var(--brand-darker)}
.sources{border-top:1px solid var(--line);margin:28px 0 8px;padding-top:18px}
.sources h2{font-size:1.15rem;margin:0 0 6px}
.sources p{color:var(--muted);font-size:.95rem;margin:0 0 8px}
.sources ul{margin:0 0 0 20px;padding:0}
.sources li{margin:4px 0}
.article .lede{font-size:1.15rem;color:var(--ink);border-left:4px solid var(--accent);padding-left:16px;margin:22px 0}
.article h2{font-size:1.45rem;color:var(--brand-darker);margin:38px 0 10px;padding-top:6px}
.article h3{font-size:1.15rem;color:var(--brand-dark);margin:26px 0 8px}
.article p{margin:0 0 16px}
.article ul,.article ol{margin:0 0 18px;padding-left:24px}
.article li{margin-bottom:8px}
.breadcrumb{font-size:.85rem;color:var(--muted);margin:0 0 14px}
.breadcrumb a{color:var(--brand-dark);text-decoration:none}

/* Callout boxes */
.callout{border-radius:var(--radius);padding:18px 20px;margin:24px 0;border:1px solid var(--line);background:var(--bg-soft)}
.callout h3,.callout h4{margin:0 0 8px}
.callout.danger{background:var(--danger-bg);border-color:#f3c1bb}
.callout.danger h3,.callout.danger h4{color:var(--danger)}
.callout.info{background:var(--brand-light);border-color:#bfe0e5}
.callout.info h3,.callout.info h4{color:var(--brand-darker)}
.callout.warn{background:#fef6e7;border-color:#f3dfae}
.callout.warn h3,.callout.warn h4{color:#8a5a00}
.callout p:last-child{margin-bottom:0}
.callout ul:last-child{margin-bottom:0}

/* Tables */
table.dose{width:100%;border-collapse:collapse;margin:20px 0;font-size:.95rem}
table.dose th,table.dose td{border:1px solid var(--line);padding:10px 12px;text-align:left}
table.dose th{background:var(--brand-darker);color:#fff}
table.dose tr:nth-child(even) td{background:var(--bg-soft)}
.table-scroll{overflow-x:auto}

/* FAQ */
.faq{margin:26px 0}
.faq details{border:1px solid var(--line);border-radius:10px;margin-bottom:10px;background:#fff}
.faq summary{cursor:pointer;font-weight:700;padding:14px 18px;color:var(--brand-darker);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--accent-dark);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details .a{padding:0 18px 16px;color:var(--ink)}
.faq details .a p:last-child{margin-bottom:0}

/* Author box */
.author-box{display:flex;gap:18px;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:36px 0;align-items:center}
.author-box img{width:96px;height:96px;border-radius:50%;object-fit:cover;flex-shrink:0;background:var(--brand-light)}
.author-box h3{margin:0 0 6px;color:var(--brand-darker)}
.author-box p{margin:0;color:var(--muted);font-size:.95rem}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--brand-darker),var(--brand));color:#fff;border-radius:var(--radius);padding:40px 32px;text-align:center;margin:44px 0}
.cta-band h2{color:#fff;margin:0 0 10px}
.cta-band p{opacity:.92;max-width:640px;margin:0 auto 22px}

/* Coming soon band */
.soon{background:#fff8ea;border:2px dashed var(--accent);border-radius:var(--radius);padding:32px;text-align:center;margin:44px 0}
.soon h2{color:#8a5a00}
.soon .pill{display:inline-block;background:var(--accent);color:#3a2a05;font-weight:800;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;padding:5px 14px;border-radius:999px;margin-bottom:12px}

/* Disclaimer */
.disclaimer{border-top:3px solid var(--accent);background:var(--bg-soft);padding:22px;border-radius:0 0 var(--radius) var(--radius);margin:36px 0;font-size:.88rem;color:var(--muted)}
.disclaimer strong{color:var(--ink)}

/* Footer */
.site-footer{background:var(--brand-darker);color:#d7e7ea;margin-top:20px;padding:44px 0 26px;font-size:.93rem}
.site-footer a{color:#fff}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:26px;margin-bottom:26px}
.footer-grid h4{color:var(--accent);margin:0 0 10px;font-size:.95rem}
.footer-grid ul{list-style:none;margin:0;padding:0}
.footer-grid li{margin-bottom:7px}
.footer-grid a{text-decoration:none}
.footer-grid a:hover{text-decoration:underline}
.footer-bottom{border-top:1px solid rgba(255,255,255,.18);padding-top:18px;font-size:.82rem;color:#a9c3c8;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* Blog */
.post-list{display:grid;gap:18px;margin-top:26px}
.post-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-decoration:none;color:var(--ink);display:block}
.post-card:hover{box-shadow:0 10px 24px rgba(10,95,107,.12)}
.post-card .date{font-size:.82rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.post-card h3{margin:6px 0 8px;color:var(--brand-darker)}
.post-card p{margin:0;color:var(--muted)}

/* 404 */
.e404{text-align:center;padding:80px 20px}
.e404 h1{font-size:4rem;color:var(--brand);margin:0}

/* Store badges (text buttons) */
.store-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

@media(max-width:640px){
  .hero{padding:44px 0 40px}
  .hero h1{font-size:1.8rem}
  .article h1{font-size:1.65rem}
  .section{padding:36px 0}
  .author-box{flex-direction:column;text-align:center}
}

/* Pills */
.pill{display:inline-block;font-weight:800;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;padding:6px 14px;border-radius:999px;margin-bottom:14px}
.pill-light{background:rgba(255,255,255,.22);color:#fff}
.pill-new{background:var(--green);color:#fff}
.pill-soon{background:var(--accent);color:#3a2a05}

/* Dropdown navigation */
.nav-drop{position:relative}
.nav-drop summary{list-style:none;cursor:pointer;color:#dceeed;font-weight:600;padding:8px 12px;border-radius:8px;font-size:.95rem;outline:none}
.nav-drop summary::-webkit-details-marker{display:none}
.nav-drop summary::marker{display:none}
.nav-drop summary:hover{background:rgba(255,255,255,.14);color:#fff}
.nav-drop summary::after{content:" \25BE";font-size:.72em;opacity:.85}
.nav-drop summary[aria-current="page"]{background:rgba(255,255,255,.18);color:#fff}
.drop-menu{position:absolute;top:calc(100% + 10px);left:0;min-width:255px;max-height:min(70vh,480px);overflow-y:auto;background:#fff;border-radius:12px;box-shadow:0 16px 40px rgba(10,60,100,.24);padding:8px;z-index:200}
.drop-menu a{display:block;color:var(--ink);text-decoration:none;padding:9px 12px;border-radius:8px;font-size:.92rem;font-weight:600}
.drop-menu a:hover{background:var(--brand-light);color:var(--brand-darker)}
.drop-menu a:first-child{color:var(--brand-dark)}
@media(max-width:720px){
  .main-nav{flex-wrap:wrap;justify-content:flex-end;row-gap:2px}
  .nav-drop{position:static}
  .nav-drop summary{padding:8px 7px;font-size:.85rem}
  .drop-menu{left:12px;right:12px;min-width:0}
}

/* Colorful feature cards */
.features .feature{border-top:5px solid var(--brand)}
.features .feature:nth-child(6n+2){border-top-color:var(--teal)}
.features .feature:nth-child(6n+3){border-top-color:var(--accent)}
.features .feature:nth-child(6n+4){border-top-color:var(--coral)}
.features .feature:nth-child(6n+5){border-top-color:var(--purple)}
.features .feature:nth-child(6n+6){border-top-color:var(--green)}
.feature .pill{margin-bottom:10px}

/* App screenshot gallery */
.screens{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-top:26px}
.screen{margin:0;text-align:center}
.screen .phone{display:block;border-radius:26px;overflow:hidden;box-shadow:0 12px 32px rgba(20,60,90,.18);border:6px solid #fff;background:#fff}
.screen img{display:block;width:100%;height:auto}
.screen figcaption{margin-top:12px;font-size:.92rem;color:var(--ink)}
.screen figcaption strong{display:block;margin-bottom:2px}

/* Colorful guide cards */
.cards .card{border-top:5px solid var(--line)}
.cards .card:nth-child(6n+1){border-top-color:var(--brand)}
.cards .card:nth-child(6n+2){border-top-color:var(--teal)}
.cards .card:nth-child(6n+3){border-top-color:var(--accent)}
.cards .card:nth-child(6n+4){border-top-color:var(--coral)}
.cards .card:nth-child(6n+5){border-top-color:var(--purple)}
.cards .card:nth-child(6n+6){border-top-color:var(--green)}

/* Available-now band (replaces coming-soon) */
.now{background:linear-gradient(135deg,#E9F6FE 0%,#FFF6E3 100%);border:2px solid var(--brand);border-radius:var(--radius);padding:36px 32px;text-align:center;margin:44px 0}
.now h2{color:var(--brand-darker)}
.now .pill{background:var(--green);color:#fff;margin-bottom:12px}