:root {
    color-scheme: light;
    --bg: #ffffff;
    --bg-elevated: rgba(255, 255, 255, 0.72);
    --bg-strong: rgba(255, 255, 255, 0.92);
    --bg-soft: #f2f2ff;
    --surface-dark: #030303;
    --text: #030303;
    --text-soft: #4a4a63;
    --heading: #030303;
    --line: rgba(16, 10, 194, 0.08);
    --line-strong: rgba(16, 10, 194, 0.16);
    --accent: #100ac2;
    --accent-strong: #0a0687;
    --accent-alt: #100ac2;
    --accent-glow: rgba(16, 10, 194, 0.24);
    --panel-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(245, 245, 255, 0.66));
    --shadow: 0 28px 90px rgba(8, 20, 34, 0.14);
    --shadow-soft: 0 18px 45px rgba(8, 20, 34, 0.09);
    --shadow-hover: 0 26px 80px rgba(8, 20, 34, 0.16);
    --radius-xl: 40px;
    --radius-lg: 32px;
    --radius-md: 24px;
    --radius-sm: 18px;
    --container: min(1180px, calc(100vw - 2rem));
    --header-height: 90px;
    --section-space: clamp(4.8rem, 9vw, 7.5rem);
    --transition: 260ms ease;
}

html[data-theme="dark"] {
    color-scheme: dark;
    --bg: #080912;
    --bg-elevated: rgba(18, 18, 34, 0.8);
    --bg-strong: rgba(24, 24, 44, 0.94);
    --bg-soft: #141633;
    --surface-dark: #ffffff;
    --text: #f6f7ff;
    --text-soft: #c2c7eb;
    --heading: #ffffff;
    --line: rgba(255, 255, 255, 0.12);
    --line-strong: rgba(104, 99, 255, 0.38);
    --accent: #100ac2;
    --accent-strong: #6b66ff;
    --accent-alt: #8e8aff;
    --accent-glow: rgba(107, 102, 255, 0.34);
    --panel-gradient: linear-gradient(180deg, rgba(27, 27, 49, 0.94), rgba(10, 10, 18, 0.88));
    --shadow: 0 30px 100px rgba(0, 0, 0, 0.5);
    --shadow-soft: 0 20px 44px rgba(0, 0, 0, 0.34);
    --shadow-hover: 0 36px 96px rgba(0, 0, 0, 0.56);
}

body.theme-transitioning,
body.theme-transitioning *,
body.theme-transitioning *::before,
body.theme-transitioning *::after {
    transition-property: background-color, color, border-color, box-shadow, fill, stroke, filter, backdrop-filter;
    transition-duration: 380ms;
    transition-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-theme="dark"] body {
    background:
        radial-gradient(circle at 8% 10%, rgba(104, 99, 255, 0.18), transparent 24%),
        radial-gradient(circle at 86% 12%, rgba(255, 255, 255, 0.06), transparent 20%),
        radial-gradient(circle at 50% 36%, rgba(255, 255, 255, 0.04), transparent 30%),
        var(--bg);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Manrope", sans-serif;
    background:
        radial-gradient(circle at 8% 10%, rgba(16, 10, 194, 0.14), transparent 22%),
        radial-gradient(circle at 86% 12%, rgba(3, 3, 3, 0.08), transparent 18%),
        radial-gradient(circle at 50% 36%, rgba(255, 255, 255, 0.42), transparent 28%),
        var(--bg);
    color: var(--text);
    transition: background-color var(--transition), color var(--transition);
    line-height: 1.65;
}

body.is-ready [data-reveal] {
    will-change: opacity, transform, filter;
}

img {
    display: block;
    width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
textarea {
    font: inherit;
}

.container {
    width: var(--container);
    margin: 0 auto;
}

.page-shell {
    min-height: 100vh;
    overflow: clip;
    position: relative;
}

.page-shell::before,
.page-shell::after {
    content: "";
    position: fixed;
    inset: auto;
    width: 26rem;
    height: 26rem;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    pointer-events: none;
    z-index: -1;
}

.page-shell::before {
    top: -6rem;
    left: -8rem;
    background: rgba(16, 10, 194, 0.16);
}

.page-shell::after {
    right: -10rem;
    top: 30rem;
    background: rgba(3, 3, 3, 0.08);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(22px);
    background: rgba(243, 246, 248, 0.52);
    border-bottom: 1px solid var(--line);
    transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

html[data-theme="dark"] .site-header {
    background: rgba(9, 10, 18, 0.72);
}

html[data-theme="dark"] .site-header.is-scrolled {
    box-shadow: 0 20px 44px rgba(0, 0, 0, 0.42);
}

.site-header.is-scrolled {
    box-shadow: 0 16px 48px rgba(8, 20, 34, 0.08);
    border-bottom-color: var(--line-strong);
}

.header-inner {
    min-height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    position: relative;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    min-width: 0;
}

.brand-mark {
    width: 200px;
    height: 70px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    padding: 0;
    background: var(--bg-strong);
    border: 1px solid var(--line-strong);
    box-shadow: var(--shadow-soft);
}

html:not([data-theme="dark"]) .brand-mark {
    background: linear-gradient(145deg, var(--accent), var(--accent-strong));
    border-color: rgba(16, 10, 194, 0.35);
}

.brand-mark img {
    width: 200px;
    height: 60px;
    object-fit: contain;
}

.brand-copy {
    display: flex;
    flex-direction: column;
}

.brand-copy strong,
.brand-copy small {
    white-space: nowrap;
}

.brand-copy strong {
    font-family: "Sora", sans-serif;
    font-size: 1.02rem;
    color: var(--heading);
}

.brand-copy small {
    color: var(--text-soft);
    font-size: 0.78rem;
}

.main-nav {
    margin-left: auto;
}

.menu-toggle {
    width: 48px;
    height: 48px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--bg-strong);
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 0 12px;
    cursor: pointer;
}

.menu-toggle span {
    height: 2px;
    background: var(--heading);
    border-radius: 999px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-panel {
    position: fixed;
    inset: calc(var(--header-height) + 0.5rem) 1rem auto 1rem;
    display: grid;
    gap: 0.15rem;
    background: var(--panel-gradient);
    border: 1px solid var(--line-strong);
    border-radius: 26px;
    padding: 1rem;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    max-height: calc(100vh - var(--header-height) - 1.5rem);
    overflow-y: auto;
    overscroll-behavior: contain;
    transition: opacity var(--transition), transform var(--transition);
}

.nav-panel a {
    padding: 0.74rem 0.88rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--text);
    transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.nav-panel .nav-link-login {
    display: inline-flex;
    align-items: center;
    gap: 0.42rem;
}

.nav-login-icon {
    width: 0.98rem;
    height: 0.98rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.nav-login-icon svg {
    width: 100%;
    height: 100%;
}

.nav-panel a:hover,
.nav-panel a:focus-visible,
.nav-panel a.is-active {
    background: rgba(255, 255, 255, 0.48);
    color: var(--heading);
    outline: none;
}

html[data-theme="dark"] .nav-panel a:hover,
html[data-theme="dark"] .nav-panel a:focus-visible,
html[data-theme="dark"] .nav-panel a.is-active {
    background: rgba(104, 99, 255, 0.2);
}

html[data-theme="dark"] .nav-panel a {
    color: #eef0ff;
}

.main-nav.is-open .nav-panel {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.main-nav.is-open .menu-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.main-nav.is-open .menu-toggle span:nth-child(2) {
    opacity: 0;
}

.main-nav.is-open .menu-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.55rem 0.7rem;
    border-radius: 999px;
    border: 1px solid var(--line-strong);
    background: var(--panel-gradient);
    color: var(--heading);
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.32);
}

.theme-toggle-track {
    width: 48px;
    height: 28px;
    padding: 3px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent-alt), var(--accent));
    display: flex;
    align-items: center;
}

.theme-toggle-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #ffffff;
    transform: translateX(0);
    transition: transform var(--transition);
}

html[data-theme="dark"] .theme-toggle-thumb {
    transform: translateX(20px);
}

.theme-toggle-label {
    font-weight: 700;
    letter-spacing: 0.02em;
}

.hero-section {
    position: relative;
    padding: clamp(0.6rem, 1.9vw, 1.5rem) 0 2.5rem;
}

.hero-backdrop {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 0%, rgba(16, 10, 194, 0.16), transparent 24%),
        radial-gradient(circle at 80% 15%, rgba(3, 3, 3, 0.12), transparent 20%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.16), transparent 30%);
    pointer-events: none;
    transition: transform 900ms cubic-bezier(0.22, 1, 0.36, 1);
}

.hero-grid {
    display: grid;
    gap: 1.5rem;
    align-items: center;
}

.hero-copy,
.hero-carousel,
.activity-card,
.video-card,
.news-card,
.notice-card,
.event-card,
.social-card,
.contact-column,
.sponsor-marquee {
    backdrop-filter: blur(18px);
}

.hero-copy {
    position: relative;
    padding: 0.35rem 0 1rem;
}

.hero-copy::before {
    content: "";
    position: absolute;
    left: -1.4rem;
    top: 1.7rem;
    width: 1px;
    height: 7rem;
    background: linear-gradient(180deg, transparent, var(--accent-alt), transparent);
    opacity: 0.65;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.5rem 0.85rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.42);
    border: 1px solid rgba(255, 255, 255, 0.5);
    color: var(--accent-alt);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.72rem;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

html[data-theme="dark"] .eyebrow {
    background: rgba(104, 99, 255, 0.16);
    border-color: rgba(104, 99, 255, 0.3);
    color: #b8bbff;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.eyebrow::before {
    content: "";
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-alt), var(--accent));
    box-shadow: 0 0 0 6px rgba(16, 10, 194, 0.08);
}

.hero-copy h1,
.section-heading h2,
.section-heading-left h2,
.hero-slide-content h2 {
    margin: 1rem 0 0.8rem;
    color: var(--heading);
    font-family: "Sora", sans-serif;
    line-height: 1.05;
}

.hero-copy h1 {
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    max-width: 12ch;
    letter-spacing: -0.045em;
}

.section-heading h2,
.section-heading-left h2,
.hero-slide-content h2,
.event-body h3,
.activity-content h3,
.video-card-copy h3,
.news-card h3,
.notice-card h3,
.site-footer h3 {
    letter-spacing: -0.03em;
}

.hero-text,
.section-heading p,
.section-heading-left p,
.hero-slide-content p,
.contact-form label span,
.form-feedback,
.site-footer p,
.site-footer li {
    color: var(--text-soft);
}

.hero-text {
    max-width: 60ch;
    font-size: 1.02rem;
}

.hero-actions,
.hero-metrics,
.hero-controls,
.activity-meta,
.footer-grid,
.footer-bottom {
    display: flex;
}

.hero-actions {
    gap: 0.85rem;
    flex-wrap: wrap;
    margin-top: 1.8rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0.92rem 1.45rem;
    border-radius: 999px;
    font-weight: 800;
    border: 1px solid transparent;
    transition: transform var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
}

.button:hover,
.button:focus-visible,
.text-link:hover,
.text-link:focus-visible,
.social-card:hover,
.social-card:focus-visible,
.play-button:hover,
.play-button:focus-visible,
.back-to-top:hover,
.back-to-top:focus-visible {
    transform: translateY(-2px);
}

.button-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #ffffff;
    box-shadow: 0 18px 32px var(--accent-glow);
}

.button-secondary,
.button-ghost {
    border-color: var(--line-strong);
    background: rgba(255, 255, 255, 0.16);
    color: var(--heading);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.36);
}

html[data-theme="dark"] .button-secondary,
html[data-theme="dark"] .button-ghost {
    background: rgba(104, 99, 255, 0.14);
    border-color: rgba(104, 99, 255, 0.3);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

html[data-theme="dark"] .button-secondary:hover,
html[data-theme="dark"] .button-ghost:hover,
html[data-theme="dark"] .button-secondary:focus-visible,
html[data-theme="dark"] .button-ghost:focus-visible {
    background: rgba(104, 99, 255, 0.24);
}

.hero-metrics {
    list-style: none;
    padding: 0;
    margin: 2.1rem 0 0;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero-metrics li {
    min-width: 140px;
    flex: 1 1 140px;
    padding: 1.05rem 1rem;
    border-radius: 24px;
    background: var(--panel-gradient);
    border: 1px solid var(--line-strong);
    box-shadow: var(--shadow-soft);
}

.hero-metrics strong {
    display: block;
    color: var(--heading);
    font: 800 1.5rem "Sora", sans-serif;
}

.hero-carousel {
    position: relative;
    min-height: 540px;
    padding: 1rem;
    border-radius: var(--radius-xl);
    background: var(--panel-gradient);
    border: 1px solid var(--line-strong);
    box-shadow: var(--shadow);
    isolation: isolate;
}

.hero-carousel::before {
    content: "";
    position: absolute;
    inset: -12% auto auto -12%;
    width: 12rem;
    height: 12rem;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(16, 10, 194, 0.18), transparent 70%);
    z-index: -1;
}

.hero-slides {
    position: relative;
    min-height: 470px;
}

.hero-slide {
    position: absolute;
    inset: 0;
    border-radius: calc(var(--radius-xl) - 10px);
    padding: 1.4rem;
    background-image: var(--bg-image);
    background-size: cover;
    background-position: center;
    overflow: hidden;
    opacity: 0;
    transform: scale(0.985);
    transition: opacity 700ms ease, transform 700ms ease;
}

.hero-slide.is-active {
    opacity: 1;
    transform: scale(1);
}

.hero-slide-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(7, 17, 29, 0.06), rgba(7, 17, 29, 0.78)),
    radial-gradient(circle at 80% 20%, rgba(16, 10, 194, 0.24), transparent 28%);
}

html[data-theme="dark"] .hero-slide-overlay {
    background:
    linear-gradient(180deg, rgba(3, 3, 8, 0.12), rgba(3, 3, 8, 0.88)),
    radial-gradient(circle at 80% 20%, rgba(104, 99, 255, 0.24), transparent 34%);
}

.hero-slide-content {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: end;
    padding: 1.2rem;
    color: #f5f8fb;
}

.hero-slide-content h2 {
    color: #ffffff;
    font-size: clamp(1.8rem, 4vw, 3rem);
    max-width: 13ch;
}

.slide-tag,
.news-category {
    display: inline-flex;
    width: fit-content;
    padding: 0.45rem 0.7rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.slide-tag {
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(10px);
}

.news-category {
    background: rgba(16, 10, 194, 0.1);
    color: var(--accent-alt);
}

.hero-controls {
    position: relative;
    z-index: 2;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
    padding-top: 1rem;
}

.hero-dots {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    flex: 1;
}

.hero-dot,
.hero-arrow,
.play-button,
.back-to-top,
.video-modal-close {
    border: 0;
    cursor: pointer;
}

.hero-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(83, 97, 111, 0.4);
    transition: transform var(--transition), background-color var(--transition);
}

.hero-dot.is-active {
    background: var(--accent);
    transform: scale(1.35);
}

.hero-arrow {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--panel-gradient);
    border: 1px solid var(--line-strong);
    color: var(--heading);
    box-shadow: var(--shadow-soft);
}

.section {
    position: relative;
    padding: var(--section-space) 0;
}

.section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    width: var(--container);
    max-width: calc(100vw - 2rem);
    height: 1px;
    transform: translateX(-50%);
    background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.section-heading {
    max-width: 760px;
    margin-bottom: 2.5rem;
}

.section-heading-left {
    margin-bottom: 1.5rem;
}

.activity-list,
.video-grid,
.news-grid,
.notice-grid,
.events-grid,
.social-grid,
.contact-layout {
    display: grid;
    gap: 1.35rem;
}

.activity-card,
.video-card,
.news-card,
.notice-card,
.event-card,
.social-card,
.contact-column,
.map-card {
    border: 1px solid var(--line-strong);
    background: var(--panel-gradient);
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background-color var(--transition);
}

.activity-card:hover,
.video-card:hover,
.news-card:hover,
.notice-card:hover,
.event-card:hover,
.social-card:hover,
.contact-column:hover,
.map-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(16, 10, 194, 0.24);
}

.activity-card {
    border-radius: 32px;
    overflow: hidden;
}

.activity-card img,
.video-card img,
.news-card img,
.notice-card img {
    transition: transform 700ms ease;
}

[data-parallax] {
    transform: translate3d(0, 0, 0);
    transition: transform 900ms cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
}

.activity-card:hover img,
.video-card:hover img,
.news-card:hover img,
.notice-card:hover img {
    transform: scale(1.04);
}

.activity-card-forum img {
    object-position: center 24%;
}

.activity-content {
    padding: 1.55rem 1.45rem 1.55rem;
}

.activity-meta {
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.8rem;
}

.activity-meta span {
    padding: 0.42rem 0.7rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.52);
    border: 1px solid rgba(255, 255, 255, 0.48);
    color: var(--heading);
    font-size: 0.78rem;
    font-weight: 700;
}

html[data-theme="dark"] .activity-meta span {
    background: rgba(104, 99, 255, 0.14);
    border-color: rgba(104, 99, 255, 0.24);
    color: #f2f3ff;
}

.activity-content h3,
.video-card-copy h3,
.news-card h3,
.notice-card h3,
.event-body h3,
.site-footer h3 {
    margin: 0 0 0.55rem;
    color: var(--heading);
    font-family: "Sora", sans-serif;
}

.activity-content p,
.video-card-copy p,
.news-card p,
.notice-card p,
.event-body p,
.social-card span {
    margin: 0;
    color: var(--text-soft);
}

.video-grid,
.notice-grid,
.social-grid,
.footer-grid {
    grid-template-columns: 1fr;
}

.video-card,
.news-card,
.notice-card,
.social-card {
    position: relative;
    border-radius: 30px;
    overflow: hidden;
}

.video-card img,
.news-card img,
.notice-card img {
    aspect-ratio: 16 / 11;
    object-fit: cover;
}

.news-card img {
    height: clamp(210px, 22vw, 270px);
}

.play-button {
    position: absolute;
    top: 1rem;
    right: 1rem;
    min-width: 74px;
    min-height: 46px;
    border-radius: 999px;
    background: rgba(7, 17, 29, 0.56);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: #ffffff;
    font-weight: 800;
}

.video-card-copy,
.notice-card-body,
.news-card-body {
    padding: 1.4rem;
}

.news-card-body,
.notice-card-body {
    display: grid;
    gap: 0.25rem;
}

.news-grid {
    grid-template-columns: 1fr;
}

.text-link {
    display: inline-flex;
    margin-top: 1rem;
    color: var(--accent);
    font-weight: 800;
    align-items: center;
    gap: 0.45rem;
}

.text-link::after {
    content: "+";
    width: 1.35rem;
    height: 1.35rem;
    display: inline-grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(16, 10, 194, 0.12);
}

.events-grid {
    grid-template-columns: 1fr;
}

.event-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1rem;
    align-items: start;
    padding: 1.35rem;
    border-radius: 28px;
}

.event-date {
    min-width: 84px;
    padding: 1rem 0.7rem;
    border-radius: 24px;
    text-align: center;
    background: linear-gradient(180deg, var(--accent), var(--accent-alt));
    color: #ffffff;
    box-shadow: 0 16px 30px rgba(16, 10, 194, 0.24);
}

.event-date strong {
    display: block;
    font: 800 2rem "Sora", sans-serif;
    line-height: 1;
}

.event-date span {
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.sponsors-shell {
    position: relative;
}

.sponsor-marquee {
    overflow: hidden;
    border-radius: 32px;
    border: 1px solid var(--line-strong);
    background: var(--panel-gradient);
    position: relative;
}

.sponsor-marquee::before,
.sponsor-marquee::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 5rem;
    z-index: 1;
    pointer-events: none;
}

.sponsor-marquee::before {
    left: 0;
    background: linear-gradient(90deg, var(--bg), transparent);
}

.sponsor-marquee::after {
    right: 0;
    background: linear-gradient(270deg, var(--bg), transparent);
}

.sponsor-track {
    display: flex;
    align-items: center;
    width: max-content;
    gap: 1rem;
    padding: 1rem;
    animation: marquee 28s linear infinite;
}

.sponsor-pill {
    min-width: 170px;
    min-height: 84px;
    padding: 1rem 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.56);
    border: 1px solid rgba(255, 255, 255, 0.48);
    color: var(--heading);
    font: 800 1rem "Sora", sans-serif;
    letter-spacing: 0.04em;
}

.sponsor-pill img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 8px;
    background: #fff;
    padding: 0.2rem;
}

.sponsor-pill strong {
    font-size: 0.92rem;
    line-height: 1.1;
}

html[data-theme="dark"] .sponsor-pill {
    background: rgba(104, 99, 255, 0.12);
    border-color: rgba(104, 99, 255, 0.24);
}

.social-card {
    display: grid;
    gap: 0.45rem;
    padding: 1.5rem;
}

.social-card-head {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
}

.social-icon {
    width: 20px;
    height: 20px;
    color: var(--accent);
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.social-card strong {
    color: var(--heading);
    font-family: "Sora", sans-serif;
}

.footer-social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-social-dot {
    width: 0.42rem;
    height: 0.42rem;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(16, 10, 194, 0.14);
}

.contact-layout {
    align-items: stretch;
}

.contact-column {
    padding: 1.6rem;
    border-radius: 32px;
}

.contact-form-column {
    padding: 1.25rem;
}

.map-column {
    padding: 1.25rem;
}

.contact-form {
    display: grid;
    gap: 1rem;
}

.contact-form label {
    display: grid;
    gap: 0.55rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    border-radius: 20px;
    border: 1px solid var(--line-strong);
    background: rgba(255, 255, 255, 0.58);
    color: var(--text);
    padding: 1rem 1rem;
    transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

html[data-theme="dark"] .contact-form input,
html[data-theme="dark"] .contact-form textarea {
    background: rgba(104, 99, 255, 0.1);
    border-color: rgba(104, 99, 255, 0.24);
    color: #f6f7ff;
}

html[data-theme="dark"] .contact-form input::placeholder,
html[data-theme="dark"] .contact-form textarea::placeholder {
    color: #c4c8ea;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-alt);
    box-shadow: 0 0 0 4px rgba(16, 10, 194, 0.12);
}

.form-feedback {
    min-height: 1.4rem;
    margin: 0;
    font-weight: 700;
}

.map-card {
    overflow: hidden;
    border-radius: 28px;
    min-height: 100%;
}

.map-card iframe {
    border: 0;
    width: 100%;
    min-height: clamp(390px, 48vw, 560px);
}

.site-footer {
    padding: 4rem 0 1.5rem;
    border-top: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(7, 17, 29, 0.03), rgba(7, 17, 29, 0.06));
}

html[data-theme="dark"] .site-footer {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), rgba(255, 255, 255, 0.03));
}

html[data-theme="dark"] .slide-tag {
    background: rgba(104, 99, 255, 0.2);
    border-color: rgba(104, 99, 255, 0.34);
}

.footer-grid {
    gap: 1.2rem;
}

.site-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.6rem;
}

.site-footer li,
.site-footer a {
    color: var(--text-soft);
}

.brand-footer {
    margin-bottom: 1rem;
}

.footer-bottom {
    justify-content: center;
    margin-top: 2rem;
    padding-top: 1.2rem;
    border-top: 1px solid var(--line);
}

.back-to-top {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: 30;
    min-width: 74px;
    min-height: 50px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent-alt), var(--accent));
    color: #ffffff;
    font-weight: 800;
    box-shadow: 0 18px 36px rgba(16, 10, 194, 0.24);
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity var(--transition), transform var(--transition);
}

.back-to-top.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.video-modal {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: grid;
    place-items: center;
    padding: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}

.video-modal.is-open {
    opacity: 1;
    pointer-events: auto;
}

.video-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(3, 8, 14, 0.82);
}

.video-modal-content {
    position: relative;
    z-index: 1;
    width: min(960px, 100%);
    max-height: calc(100vh - 2rem);
    padding: 1.1rem;
    border-radius: 32px;
    background: var(--panel-gradient);
    border: 1px solid var(--line-strong);
    box-shadow: var(--shadow);
    overflow: auto;
}

.video-modal-close {
    position: absolute;
    top: 0.7rem;
    right: 0.7rem;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--bg-soft);
    color: var(--heading);
    font-size: 1.4rem;
}

.video-frame-wrapper {
    border-radius: 20px;
    overflow: hidden;
}

.video-frame-wrapper iframe {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    border: 0;
}

[data-reveal] {
    --reveal-delay: 0ms;
    --reveal-duration: 900ms;
    --reveal-distance: 36px;
    opacity: 0;
    filter: blur(10px);
    transform: translate3d(0, var(--reveal-distance), 0) scale(0.985);
    transform-origin: center center;
    transition:
        opacity var(--reveal-duration) cubic-bezier(0.22, 1, 0.36, 1),
        transform var(--reveal-duration) cubic-bezier(0.22, 1, 0.36, 1),
        filter var(--reveal-duration) cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: var(--reveal-delay);
}

[data-reveal="zoom-in"] {
    transform: translate3d(0, 24px, 0) scale(0.94);
}

[data-reveal="zoom-in-soft"] {
    transform: translate3d(0, 18px, 0) scale(0.97);
    filter: blur(8px);
}

[data-reveal="fade-up"] {
    transform: translate3d(0, 36px, 0);
}

[data-reveal="fade-right"] {
    transform: translate3d(-46px, 14px, 0);
}

[data-reveal="fade-left"] {
    transform: translate3d(46px, 14px, 0);
}

[data-reveal="blur-up"] {
    transform: translate3d(0, 28px, 0) scale(0.99);
    filter: blur(14px);
}

[data-reveal="tilt-in"] {
    transform: perspective(1200px) rotateX(8deg) rotateY(-8deg) translate3d(0, 34px, 0) scale(0.96);
    transform-origin: 50% 80%;
}

[data-reveal="mask-up"] {
    transform: translate3d(0, 52px, 0) scale(1);
    clip-path: inset(0 0 36% 0 round 22px);
    filter: blur(10px);
}

[data-reveal="lift-in"] {
    transform: translate3d(0, 44px, 0) scale(0.965);
    filter: blur(6px);
}

[data-reveal].is-visible {
    opacity: 1;
    filter: blur(0);
    clip-path: inset(0 0 0 0 round 22px);
    transform: translate3d(0, 0, 0) scale(1) rotateX(0) rotateY(0);
}

@media (max-width: 959px) {
    .theme-toggle-label {
        display: none;
    }

    .hero-copy::before {
        display: none;
    }

    [data-parallax] {
        transform: none !important;
    }
}

@media (max-width: 599px) {
    :root {
        --container: min(100vw - 1.2rem, 100%);
        --header-height: 82px;
        --section-space: clamp(3.5rem, 10vw, 4.8rem);
    }

    body {
        font-size: 0.96rem;
    }

    .page-shell::before,
    .page-shell::after {
        width: 16rem;
        height: 16rem;
        filter: blur(60px);
        opacity: 0.28;
    }

    .header-inner {
        gap: 0.75rem;
    }

    .brand {
        gap: 0.7rem;
        min-width: 0;
    }

    .brand-mark {
        width: 210px;
        height: 64px;
    }

    .brand-copy strong {
        font-size: 0.95rem;
    }

    .brand-copy small {
        font-size: 0.7rem;
    }

    .hero-section {
        padding-top: 0.25rem;
    }

    .hero-copy {
        padding-top: 0;
    }

    .hero-copy h1 {
        max-width: 10.5ch;
        font-size: clamp(1.6rem, 8.2vw, 2.5rem);
    }

    .hero-text {
        font-size: 0.96rem;
    }

    .hero-actions {
        gap: 0.7rem;
    }

    .hero-actions .button {
        width: 100%;
    }

    .hero-metrics {
        display: grid;
        grid-template-columns: 1fr;
    }

    .hero-carousel {
        min-height: 460px;
        padding: 0.75rem;
        border-radius: 28px;
    }

    .hero-slides {
        min-height: 390px;
    }

    .hero-slide {
        padding: 0.8rem;
        border-radius: 22px;
    }

    .hero-slide-content {
        padding: 0.8rem;
    }

    .hero-slide-content h2 {
        font-size: clamp(1.4rem, 7vw, 2rem);
        max-width: 11ch;
    }

    .hero-controls {
        gap: 0.6rem;
    }

    .hero-arrow {
        width: 42px;
        height: 42px;
    }

    .section-heading {
        margin-bottom: 1.8rem;
    }

    .section-heading h2,
    .section-heading-left h2 {
        font-size: clamp(1.7rem, 8vw, 2.2rem);
    }

    .activity-card,
    .video-card,
    .news-card,
    .notice-card,
    .social-card,
    .contact-column,
    .event-card,
    .sponsor-marquee {
        border-radius: 24px;
    }

    .activity-content,
    .video-card-copy,
    .notice-card-body,
    .news-card-body,
    .social-card,
    .contact-column,
    .event-card {
        padding: 1.15rem;
    }

    .event-card {
        grid-template-columns: 1fr;
    }

    .event-date {
        min-width: 0;
        width: fit-content;
    }

    .sponsor-track {
        gap: 0.75rem;
        padding: 0.85rem;
    }

    .sponsor-pill {
        min-width: 138px;
        min-height: 72px;
        padding: 0.8rem 1rem;
        font-size: 0.88rem;
    }

    .sponsor-pill img {
        width: 40px;
        height: 40px;
    }

    .social-grid,
    .notice-grid,
    .video-grid,
    .events-grid,
    .news-grid,
    .contact-layout,
    .footer-grid {
        gap: 1rem;
    }

    .contact-form {
        gap: 0.85rem;
    }

    .map-card iframe {
        min-height: 320px;
    }

    .site-footer {
        padding-top: 3rem;
    }

    .footer-bottom {
        margin-top: 1.4rem;
        text-align: center;
    }

    .back-to-top {
        right: 0.75rem;
        bottom: 0.75rem;
        min-width: 66px;
        min-height: 46px;
    }

    .video-modal {
        padding: 0.6rem;
    }

    .video-modal-content {
        border-radius: 24px;
        padding: 0.85rem;
    }
}

@media (min-width: 600px) and (max-width: 959px) {
    :root {
        --container: min(100vw - 2rem, 100%);
        --section-space: clamp(4.2rem, 8vw, 5.8rem);
    }

    .header-inner {
        gap: 0.9rem;
    }

    .hero-section {
        padding-top: 0.7rem;
    }

    .hero-copy h1 {
        max-width: 11ch;
        font-size: clamp(1.9rem, 5.2vw, 2.9rem);
    }

    .hero-actions .button {
        min-width: 180px;
    }

    .hero-carousel {
        min-height: 500px;
    }

    .hero-slides {
        min-height: 430px;
    }

    .activity-card {
        grid-template-columns: minmax(200px, 240px) 1fr;
    }

    .events-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .event-card {
        grid-template-columns: 1fr;
    }

    .event-date {
        width: fit-content;
    }

    .map-card iframe {
        min-height: 360px;
    }

    .footer-grid > :first-child {
        grid-column: span 2;
    }
}

@keyframes marquee {
    from {
        transform: translateX(0);
    }

    to {
        transform: translateX(-50%);
    }
}

@media (min-width: 720px) {
    .video-grid,
    .notice-grid,
    .social-grid,
    .contact-layout,
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-heading {
        margin-bottom: 3rem;
    }

    .activity-card {
        display: grid;
        grid-template-columns: minmax(220px, 280px) 1fr;
    }

    .activity-card img {
        height: 100%;
        object-fit: cover;
    }

    .news-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .news-card-featured {
        grid-column: span 2;
        display: grid;
        grid-template-columns: 1.2fr 1fr;
    }

    .news-card-featured img {
        height: 100%;
    }
}

@media (min-width: 960px) {
    .hero-section {
        padding-top: 1.5rem;
    }

    .hero-grid {
        grid-template-columns: 0.98fr 1.02fr;
        gap: 2.4rem;
    }

    .menu-toggle {
        display: none;
    }

    .nav-panel {
        position: static;
        display: flex;
        align-items: center;
        gap: 0.18rem;
        padding: 0.35rem;
        opacity: 1;
        pointer-events: auto;
        transform: none;
        border-radius: 999px;
        border: 1px solid var(--line-strong);
        background: var(--panel-gradient);
        box-shadow: var(--shadow-soft);
    }

    .nav-panel a {
        padding: 0.52rem 0.62rem;
        font-size: 0.82rem;
    }

    .nav-panel .nav-link-login {
        gap: 0.28rem;
    }

    .video-grid,
    .notice-grid,
    .social-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .events-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .contact-layout {
        grid-template-columns: 0.85fr 1.15fr;
    }

    .contact-form-column {
        padding: 1rem;
    }

    .map-column {
        padding: 1.3rem;
    }

    .footer-grid {
        grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
    }
}

@media (min-width: 1280px) {
    :root {
        --container: min(1280px, calc(100vw - 4rem));
    }

    .hero-grid {
        gap: 3rem;
    }

    .hero-copy h1 {
        max-width: 11ch;
    }

    .section-heading {
        max-width: 820px;
    }

    .news-grid {
        grid-template-columns: 1.2fr 1fr 1fr;
    }

    .news-card-featured {
        grid-column: span 2;
    }
}

@media (min-width: 1440px) {
    .hero-section {
        padding-top: 1.9rem;
    }

    .hero-carousel {
        min-height: 600px;
    }

    .hero-slides {
        min-height: 530px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    [data-reveal],
    [data-parallax] {
        opacity: 1 !important;
        filter: none !important;
        clip-path: none !important;
        transform: none !important;
    }
}