:root {
    --ink: #16353a;
    --muted: #5e7275;
    --deep: #063f45;
    --sea: #087f78;
    --sea-light: #dcefeb;
    --foam: #f4f8f6;
    --sand: #f2e6ce;
    --white: #fff;
    --danger: #a52a2a;
    --radius: 18px;
    --shadow: 0 18px 45px rgba(6, 63, 69, .1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--foam); font: 16px/1.6 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: var(--deep); text-underline-offset: 3px; }
.skip-link { position: fixed; z-index: 10; top: 12px; left: 12px; padding: 10px 14px; color: var(--white); background: var(--deep); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.site-header { color: var(--white); background: var(--deep); border-bottom: 4px solid var(--sea); }
.site-header__inner, .site-main, .site-footer__inner { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.site-header__inner { min-height: 132px; display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-block: 22px; }
.brand { display: flex; align-items: center; gap: 17px; color: inherit; text-decoration: none; }
.brand__mark { display: grid; width: 64px; height: 64px; place-items: center; border-radius: 50%; background: rgba(255, 255, 255, .1); }
.brand__mark svg { width: 47px; height: 47px; fill: none; stroke: #8fd2bc; stroke-width: 4; stroke-linecap: round; }
.brand__text, .brand__eyebrow, .brand__title { display: block; }
.brand__eyebrow, .eyebrow { font-size: .75rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.brand__eyebrow { color: #a9d9cc; }
.brand__title { font-family: Georgia, serif; font-size: clamp(1.35rem, 3vw, 2rem); line-height: 1.08; }
.event-meta { display: flex; flex-direction: column; align-items: flex-end; color: #d6e8e5; font-weight: 650; }
.site-nav { border-top: 1px solid rgba(255, 255, 255, .13); background: rgba(0, 0, 0, .08); }
.site-nav__inner { display: flex; width: min(1180px, calc(100% - 40px)); margin-inline: auto; gap: 6px; }
.site-nav__link { position: relative; padding: 15px 18px 14px; color: #d6e8e5; font-size: .95rem; font-weight: 720; text-decoration: none; }
.site-nav__link:hover { color: var(--white); background: rgba(255, 255, 255, .07); }
.site-nav__link--active { color: var(--white); }
.site-nav__link--active::after { content: ""; position: absolute; right: 18px; bottom: -1px; left: 18px; height: 4px; background: #8fd2bc; border-radius: 4px 4px 0 0; }
.site-main { padding-block: clamp(42px, 7vw, 84px) 90px; }
.registration-hero { max-width: 790px; margin-bottom: 48px; }
.eyebrow { margin: 0 0 8px; color: var(--sea); }
h1, h2, legend { font-family: Georgia, serif; color: var(--deep); }
h1 { margin: 0; font-size: clamp(2.25rem, 6vw, 4.5rem); line-height: 1.02; letter-spacing: -.035em; }
.registration-hero__intro { max-width: 680px; margin: 22px 0 0; color: var(--muted); font-size: 1.15rem; }
.registration-layout { display: grid; grid-template-columns: minmax(230px, 330px) minmax(0, 1fr); gap: 30px; align-items: start; }
.event-card, .form-card, .success-card { border: 1px solid rgba(6, 63, 69, .1); border-radius: var(--radius); box-shadow: var(--shadow); }
.event-card { position: sticky; top: 24px; padding: 28px; background: var(--deep); color: #e4f0ee; overflow: hidden; }
.event-card::after { content: ""; position: absolute; width: 210px; height: 210px; right: -100px; bottom: -100px; border: 35px solid rgba(143, 210, 188, .12); border-radius: 50%; }
.event-card .eyebrow { color: #8fd2bc; }
.event-facts { margin: 26px 0; }
.event-facts div { padding: 15px 0; border-top: 1px solid rgba(255, 255, 255, .16); }
.event-facts dt { color: #9fc3bf; font-size: .75rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.event-facts dd { margin: 2px 0 0; color: var(--white); font-weight: 700; }
.event-card__note { position: relative; z-index: 1; font-size: .92rem; }
.form-card { padding: clamp(24px, 5vw, 48px); background: var(--white); }
fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
fieldset + fieldset { margin-top: 42px; padding-top: 38px; border-top: 1px solid #dce6e3; }
legend { width: 100%; margin-bottom: 22px; font-size: 1.5rem; font-weight: 700; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 21px; }
.form-field { display: flex; flex-direction: column; gap: 7px; }
.form-field--wide { grid-column: 1 / -1; }
.form-field--short { max-width: 220px; }
label { color: var(--ink); font-weight: 720; }
.optional { color: var(--muted); font-size: .85rem; font-weight: 450; }
input[type="text"], input[type="email"], input[type="tel"], select, textarea { width: 100%; min-height: 48px; padding: 11px 13px; color: var(--ink); background: #fbfdfc; border: 1px solid #afc2bf; border-radius: 9px; font: inherit; transition: border-color .15s, box-shadow .15s; }
textarea { min-height: 110px; resize: vertical; }
input:focus, select:focus, textarea:focus, button:focus { outline: 3px solid rgba(8, 127, 120, .2); outline-offset: 2px; border-color: var(--sea); }
.choice { display: flex; align-items: flex-start; gap: 12px; font-weight: 500; }
.choice input { width: 20px; height: 20px; margin-top: 3px; accent-color: var(--sea); }
.form-trap { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; opacity: 0 !important; pointer-events: none !important; }
.form-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 40px; }
.button { min-height: 47px; padding: 11px 20px; border: 1px solid transparent; border-radius: 999px; font: inherit; font-weight: 750; cursor: pointer; }
.button--primary { color: var(--white); background: var(--sea); box-shadow: 0 8px 20px rgba(8, 127, 120, .2); }
.button--primary:hover { background: var(--deep); }
.button--secondary, .button--quiet { color: var(--deep); background: transparent; border-color: #99b2ae; }
.button--secondary:hover, .button--quiet:hover { background: var(--sea-light); }
.button--quiet { min-height: 40px; padding: 7px 14px; }
.alert { margin-bottom: 32px; padding: 18px 20px; border-radius: 10px; }
.alert--error { color: #702020; background: #fff0ef; border-left: 4px solid var(--danger); }
.alert ul { margin-bottom: 0; }
.success-card { max-width: 760px; padding: clamp(32px, 7vw, 70px); background: var(--white); text-align: center; }
.success-card__icon { display: grid; width: 70px; height: 70px; margin: 0 auto 24px; place-items: center; color: var(--white); background: var(--sea); border-radius: 50%; font-size: 2rem; }
.success-card h2 { margin: 0; font-size: clamp(2rem, 5vw, 3.3rem); }
.content-page { max-width: 840px; min-height: 45vh; }
.content-page__card { margin-top: 36px; padding: clamp(25px, 5vw, 44px); background: var(--white); border: 1px solid rgba(6, 63, 69, .1); border-radius: var(--radius); box-shadow: var(--shadow); }
.content-page__card h2 { margin-top: 0; }
.site-footer { padding-block: 36px; color: #d6e8e5; background: #042f34; }
.site-footer__inner { display: flex; justify-content: space-between; gap: 30px; }
.site-footer p { margin: 4px 0 0; color: #a9c4c1; }
.footer-nav { display: flex; gap: 22px; }
.footer-nav a { color: var(--white); }

@media (max-width: 800px) {
    .site-header__inner { min-height: 105px; }
    .event-meta { display: none; }
    .registration-layout { grid-template-columns: 1fr; }
    .event-card { position: static; }
    .site-footer__inner { flex-direction: column; }
}
@media (max-width: 560px) {
    .site-header__inner, .site-main, .site-footer__inner { width: min(100% - 28px, 1180px); }
    .site-nav__inner { width: 100%; padding-inline: 7px; overflow-x: auto; scrollbar-width: thin; }
    .site-nav__link { flex: 0 0 auto; padding-inline: 12px; font-size: .88rem; }
    .site-nav__link--active::after { right: 12px; left: 12px; }
    .brand__mark { width: 52px; height: 52px; }
    .brand__mark svg { width: 39px; height: 39px; }
    .form-grid { grid-template-columns: 1fr; }
    .form-field--wide { grid-column: auto; }
    .form-field--short { max-width: none; }
    .form-actions .button { width: 100%; }
}