:root {
    color-scheme: dark;
    --primary-green: #00ff41;
    --secondary-green: #39ff14;
    --primary-purple: #6b46c1;
    --secondary-purple: #8b5cf6;
    --dark-bg: #000000;
    --dark-section: #0a0a0a;
    --text-white: #ffffff;
    --text-gray: #e5e7eb;
    --text-muted: #adb5bf;
    --border-green: rgba(0, 255, 65, 0.3);
    --gradient-primary: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; background: var(--dark-bg); color: var(--text-white); font-family: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif; line-height: 1.7; word-break: keep-all; }
a { color: inherit; text-underline-offset: 5px; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--primary-green); outline-offset: 5px; }
.skip-link { position: fixed; top: -100px; left: 20px; padding: 12px; background: var(--primary-green); color: var(--dark-bg); z-index: 10; }
.skip-link:focus { top: 10px; }
.site-header { position: sticky; top: 0; z-index: 20; max-width: 1280px; margin: auto; padding: 12px 48px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; align-items: center; background: var(--dark-bg); border-bottom: 1px solid var(--border-green); box-shadow: 0 0 0 100vmax var(--dark-bg); clip-path: inset(0 -100vmax); }
.brand { display: block; max-width: 100%; text-decoration: none; line-height: 1.3; }
.brand img { display: block; width: 160px; max-width: 100%; height: auto; }
nav { display: flex; flex-wrap: wrap; gap: 28px; margin-left: auto; }
nav a { font-size: 14px; font-weight: 700; text-decoration: none; }
nav a:hover { color: var(--primary-green); }
.menu-toggle { display: none; }
.hero { max-width: 1280px; margin: auto; padding: 76px 48px 84px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 45px; align-items: center; }
.eyebrow { font-size: 12px; font-weight: 800; letter-spacing: 1.8px; color: var(--primary-green); }
.status { display: inline-block; padding: 6px 13px; color: var(--primary-green); background: rgba(0, 255, 65, 0.07); border: 1px solid var(--border-green); border-radius: 24px; font-size: 13px; max-width: 100%; }
h1 { font-size: clamp(48px, 6.6vw, 86px); font-weight: 900; line-height: 1.13; letter-spacing: -4px; margin: 20px 0 28px; }
h1 span { color: var(--primary-green); }
.hero-description, .lead { color: var(--text-gray); font-size: 18px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { padding: 15px 22px; display: inline-flex; gap: 30px; justify-content: space-between; align-items: center; font: inherit; font-size: 15px; font-weight: 700; text-decoration: none; border: 1px solid var(--primary-green); border-radius: 6px; }
.primary { background: var(--gradient-primary); color: var(--dark-bg); box-shadow: 0 0 24px rgba(0, 255, 65, 0.12); }
.primary:hover { background: var(--primary-green); box-shadow: 0 0 30px rgba(0, 255, 65, 0.25); }
.secondary { background: transparent; color: var(--primary-green); border-color: var(--primary-green); }
.secondary:hover { background: rgba(0, 255, 65, 0.08); }
.button:disabled { opacity: 0.65; cursor: wait; }
.hero-art { position: relative; min-width: 0; min-height: 450px; display: grid; place-items: center; isolation: isolate; background-image: radial-gradient(rgba(0, 255, 65, 0.22) 1px, transparent 1px); background-size: 22px 22px; }
.orbit { position: absolute; width: 92%; aspect-ratio: 1; border: 1px solid var(--border-green); border-radius: 50%; background: radial-gradient(circle, rgba(107, 70, 193, 0.24), transparent 70%); z-index: -1; }
.mascot { position: absolute; height: auto; object-fit: contain; }
.mascot-main { width: 53%; top: 30px; left: 12%; transform: rotate(-12deg); filter: drop-shadow(0 0 24px rgba(0, 255, 65, 0.18)); }
.mascot-side { width: 30%; right: 0; top: 120px; transform: rotate(14deg); filter: drop-shadow(0 0 18px rgba(107, 70, 193, 0.3)); }
.terminal { position: absolute; bottom: 20px; right: 8px; transform: rotate(3deg); background: var(--dark-section); color: var(--primary-green); padding: 22px 28px; border: 1px solid var(--primary-green); border-radius: 8px; box-shadow: 8px 8px 0 var(--primary-purple); }
.terminal span, .terminal strong { display: block; font-family: monospace; }
.terminal strong { font-size: 23px; margin: 9px 0; }
.terminal span { font-size: 12px; }
.art-label { position: absolute; top: 6px; right: 0; color: var(--secondary-purple); font: 11px/1.4 monospace; letter-spacing: 2px; }
.event-strip { background: var(--dark-section); border-block: 1px solid var(--border-green); display: grid; grid-template-columns: 1fr 1.6fr 1fr 1fr 1.2fr; gap: 24px; padding: 28px max(48px, calc((100vw - 1184px) / 2)); }
.event-strip span, .event-strip strong { display: block; }
.event-strip span { font-size: 11px; color: var(--primary-green); letter-spacing: 1px; }
.event-strip strong { font-size: 19px; margin-top: 5px; }
.partners { display: grid; grid-template-columns: 1fr 1fr 1.5fr; gap: 24px; margin: 0; padding: 28px max(48px, calc((100vw - 1184px) / 2)); border-bottom: 1px solid var(--border-green); }
.partners dt { color: var(--text-muted); font-size: 12px; }
.partners dd { margin: 6px 0 0; font-weight: 700; font-size: 18px; }
.section { padding: 88px max(48px, calc((100vw - 1184px) / 2)); }
h2 { font-size: clamp(30px, 4vw, 48px); line-height: 1.3; letter-spacing: -1.8px; margin: 20px 0; }
h3 { font-size: 20px; margin: 15px 0 10px; line-height: 1.5; }
.guide-grid p, .timeline p { color: var(--text-gray); margin-bottom: 0; }
.tinted { background: var(--dark-section); border-block: 1px solid var(--border-green); }
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px 64px; margin-top: 32px; }
.guide-grid article { min-width: 0; padding: 10px 0 24px; border-bottom: 1px solid var(--border-green); }
.timeline { padding: 0 0 0 10px; list-style: none; margin: 40px 0 0; }
.timeline li { position: relative; display: grid; grid-template-columns: 200px 1fr; gap: 28px; padding: 0 0 42px 32px; border-left: 1px solid var(--border-green); }
.timeline li::before { content: ''; position: absolute; left: -6px; top: 23px; width: 11px; height: 11px; border-radius: 50%; background: var(--primary-green); box-shadow: 0 0 16px rgba(0, 255, 65, 0.35); }
.timeline li:last-child { padding-bottom: 0; }
.timeline li > span { padding-top: 15px; font-weight: 800; color: var(--primary-green); }
.day-schedule { margin: 20px 0 0; border-top: 1px solid rgba(0, 255, 65, 0.15); }
.day-schedule div { display: grid; grid-template-columns: 64px 1fr; gap: 16px; padding: 9px 0; border-bottom: 1px solid rgba(0, 255, 65, 0.15); }
.day-schedule dt { color: var(--primary-green); font-weight: 800; font-variant-numeric: tabular-nums; }
.day-schedule dd { margin: 0; color: var(--text-gray); }
.day-summary { display: none; }
@media (max-width: 760px) { .day-schedule { display: none; } .day-summary { display: block; margin-top: 12px; color: var(--primary-green); font-weight: 700; } }
.field-hint { display: block; margin-top: 8px; color: var(--text-muted); font-size: 13px; font-weight: 400; line-height: 1.5; }
.field-hint a { color: var(--primary-green); }
small { display: inline-block; font-size: 12px; padding: 2px 8px; color: #d8c8ff; background: #291b47; border: 1px solid var(--primary-purple); border-radius: 4px; vertical-align: middle; }
.dark { background: linear-gradient(135deg, #100b1c, var(--dark-section)); border-block: 1px solid var(--primary-purple); }
details { border-bottom: 1px solid var(--border-green); padding: 22px 0; }
summary { cursor: pointer; font-weight: 700; font-size: 18px; }
details p { max-width: 820px; color: var(--text-gray); }
.closing { background: radial-gradient(ellipse at right bottom, rgba(107, 70, 193, 0.2), transparent 65%), var(--dark-section); border-block: 1px solid var(--border-green); }
.closing .button { margin-top: 20px; }
footer { padding: 40px max(48px, calc((100vw - 1184px) / 2)); font-size: 13px; }
.footer-logo { display: block; width: 220px; max-width: 100%; height: auto; margin-bottom: 24px; }
footer strong { font-size: 16px; }
footer p { color: var(--text-gray); }
.registration-form { max-width: 850px; margin-top: 32px; }
.registration-form[hidden] { display: none; }
.registration-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.registration-fields label { display: block; font-size: 15px; font-weight: 700; }
.registration-fields label > span { color: var(--primary-green); }
.registration-fields input, .registration-fields select { display: block; margin-top: 9px; width: 100%; min-width: 0; border: 1px solid var(--border-green); border-radius: 6px; padding: 13px; background: #000; color: var(--text-white); font: inherit; }
.registration-fields input:focus-visible, .registration-fields select:focus-visible, .consent-label input:focus-visible { outline: 2px solid var(--primary-green); outline-offset: 3px; }
.registration-fields input::placeholder { color: var(--text-muted); font-weight: 400; }
.privacy-notice { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; padding: 16px 20px; margin: 28px 0; border: 1px solid var(--border-green); border-radius: 8px; }
.privacy-link { color: var(--text-gray); font-size: 14px; white-space: nowrap; }
.privacy-link:hover { color: var(--primary-green); }
.privacy-page { max-width: 850px; }
.privacy-page h1 { font-size: clamp(32px, 6vw, 48px); margin: 8px 0 16px; }
.privacy-terms { margin: 32px 0; border-top: 1px solid var(--border-green); }
.privacy-terms div { display: grid; grid-template-columns: 160px 1fr; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--border-green); }
.privacy-terms dt { color: var(--primary-green); font-weight: 700; }
.privacy-terms dd { margin: 0; }
.privacy-full-title { font-size: 20px; margin-top: 40px; }
.privacy-full { color: var(--text-gray); }
@media (max-width: 760px) { .privacy-terms div { grid-template-columns: 1fr; gap: 4px; } }
.consent-label { display: flex; align-items: flex-start; gap: 10px; }
.consent-label input { margin-top: 6px; flex-shrink: 0; accent-color: var(--primary-green); width: 18px; height: 18px; }
.registration-result { max-width: 850px; overflow-wrap: anywhere; }
.registration-result:empty { margin: 0; }
.registration-result.success { color: var(--primary-green); }
.registration-result.error { color: #fda4af; }
.registration-result.warning { color: #fde68a; }
@media (max-width: 760px) {
    html { scroll-padding-top: 76px; }
    .site-header { padding: 10px 16px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0 10px; }
    .brand img { width: 128px; }
    .menu-toggle { order: 1; display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; width: 40px; height: 40px; padding: 0 10px; background: transparent; border: 1px solid var(--border-green); border-radius: 6px; cursor: pointer; }
    .menu-toggle span { display: block; height: 2px; background: var(--text-white); border-radius: 2px; transition: transform 0.2s, opacity 0.2s; }
    .menu-open .menu-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .menu-open .menu-toggle span:nth-child(2) { opacity: 0; }
    .menu-open .menu-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    nav { order: 2; display: none; grid-column: 1 / -1; flex-direction: column; gap: 0; margin: 8px 0 0; padding-bottom: 6px; }
    .menu-open nav { display: flex; }
    nav a { padding: 12px 0; font-size: 16px; border-top: 1px solid rgba(0, 255, 65, 0.12); }
    .hero { padding: 28px 20px 50px; grid-template-columns: 1fr; gap: 30px; }
    .eyebrow { margin: 0 0 12px; font-size: 11px; letter-spacing: 1px; }
    h1 { font-size: clamp(38px, 11vw, 48px); letter-spacing: -2px; margin: 14px 0 18px; }
    .hero-description { font-size: 16px; }
    .actions { gap: 10px; margin-top: 24px; }
    .actions .button { flex: 1 1 140px; justify-content: center; gap: 8px; padding: 14px 12px; white-space: nowrap; }
    .menu-toggle { justify-self: end; }
    .hero-art { min-height: 330px; max-width: 420px; width: 100%; margin: auto; }
    .mascot-main { top: 15px; }
    .mascot-side { top: 95px; }
    .terminal { padding: 16px 20px; bottom: 12px; right: 10px; }
    .terminal strong { font-size: 19px; }
    .event-strip { padding: 25px 20px; grid-template-columns: 1fr; gap: 20px; }
    .partners { padding: 25px 20px; grid-template-columns: 1fr; gap: 18px; }
    .section { padding: 56px 20px; }
    .guide-grid, .registration-fields { grid-template-columns: 1fr; gap: 18px; }
    .timeline li { grid-template-columns: 1fr; gap: 0; }
    .timeline li > span { padding-top: 0; }
    .timeline li::before { top: 9px; }
    footer { padding: 35px 20px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}