@charset "UTF-8";

:root {
    --color-main: #050B20;
    --color-sub: #1E40AF;
    --color-deco: #7C3AED;
    --color-accent: #3AF3C5;
    --color-white: #fff;
    --color-text: #fff;
    --color-text-light: rgba(255, 255, 255, 0.85);
    --color-text-muted: rgba(255, 255, 255, 0.6);
    --color-border: rgba(255, 255, 255, 0.1);
    --color-bg: rgba(255, 255, 255, 0.03);
    --color-bg-section: #050B20;
    --color-bg-footer: #0a0e1a;
    --color-card-bg: rgba(255, 255, 255, 0.05);
    --gradient-deco: linear-gradient(135deg, var(--color-sub) 0%, var(--color-deco) 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    word-break: keep-all;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-main);
}

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

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

ul, ol {
    list-style: none;
}

.mo-only {
    display: none;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(5, 11, 32, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 100;
    height: 80px;

    & .header__logo {
        position: absolute;
        left: 20px;
        top: 50%;
        transform: translateY(-50%);

        & img {
            width: 100px;
            aspect-ratio: 446 / 236;
        }
    }

    & .header__inner {
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

.gnb {

    & .gnb__list {
        display: flex;
        gap: 40px;
        flex-wrap: nowrap;
    }

    & .gnb__item {
        width: 80px;
        text-align: center;
    }

    & .gnb__link {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 16px;
        font-weight: 600;
        color: var(--color-text);
        transition: color 0.3s;

        & span {
            font-size: 13px;
            font-weight: 400;
            color: var(--color-text-light);
            margin-top: 2px;
        }

        &:hover {
            color: var(--color-accent);

            & span {
                color: var(--color-accent);
            }
        }
    }
}

.visual {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;

    & .visual__bg {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;

        & img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
        }
    }

    & .visual__inner {
        position: relative;
        z-index: 1;
        text-align: center;
        color: var(--color-white);
        padding: 60px 20px;
    }

    & .visual__logo {
        width: 120px;
        height: 60px;
        background: rgba(255, 255, 255, 0.15);
        border: 1px solid rgba(255, 255, 255, 0.2);
        margin: 0 auto 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        border-radius: 8px;
    }

    & .visual__title {
        font-size: 56px;
        font-weight: 800;
        margin-bottom: 20px;
        letter-spacing: -2px;
        color: var(--color-white);
    }

    & .visual__subtitle {
        font-size: 22px;
        font-weight: 400;
        margin-bottom: 50px;
        color: rgba(255, 255, 255, 0.9);
    }

    & .visual__info {
        margin-bottom: 50px;
    }

    & .visual__date {
        font-size: 28px;
        font-weight: 700;
        color: var(--color-accent);
        margin-bottom: 12px;
    }

    & .visual__location {
        font-size: 18px;
        color: rgba(255, 255, 255, 0.9);
    }

    & .visual__btn {
        position: absolute;
        bottom: 120px;
        left: 50%;
        transform: translateX(-50%);
        display: inline-block;
        white-space: nowrap;
        background: var(--color-accent);
        color: var(--color-main);
        padding: 18px 70px;
        font-size: 22px;
        font-weight: 600;
        border-radius: 50px;
        transition: transform 0.3s, box-shadow 0.3s;
        box-shadow: 0 4px 20px rgba(58, 243, 197, 0.3);

        &:hover {
            transform: translateX(-50%) translateY(-3px);
            box-shadow: 0 8px 30px rgba(58, 243, 197, 0.5);
        }
    }
}

.visual.symposium {
    background: none;

    &::before {
        display: none;
    }

    & .visual__bg {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 0;

        & img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center 40px;
        }
    }
}

.quick-links {
    background: var(--color-bg-section);

    & .quick-links__inner {
        display: flex;
    }

    & .quick-links__item {
        flex: 1;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 24px;
        background: rgba(30, 64, 175, 0.08);
        color: var(--color-text);
        padding: 40px 50px;
        transition: background 0.3s;

        &:hover {
            background: var(--color-card-bg);
        }
    }

    & .quick-links__icon {
        width: 60px;
        height: auto;
        flex-shrink: 0;
    }

    & .quick-links__icon[alt="Homepage"] {
        aspect-ratio: 119 / 106;
    }

    & .quick-links__icon[alt="Live"] {
        aspect-ratio: 119 / 48;
    }

    & .quick-links__info {
        display: flex;
        flex-direction: column;

        & strong {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-accent);
            margin-bottom: 8px;
        }

        & span {
            font-size: 15px;
            color: var(--color-text-light);
            line-height: 1.5;
        }
    }
}

.section__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 20px;
}

.section__header {
    text-align: center;
    margin-bottom: 70px;
}

.section__title {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text);

    & span {
        display: block;
        font-size: 16px;
        font-weight: 400;
        color: var(--color-text-muted);
        margin-top: 10px;
        text-transform: uppercase;
        letter-spacing: 2px;
    }
}

.overview {
    background: var(--color-bg-section);

    & .overview__content {
        display: flex;
        gap: 60px;
        margin-bottom: 70px;
    }

    & .overview__text {
        flex: 1;

        & p {
            font-size: 19px;
            line-height: 1.9;
            margin-bottom: 16px;
            color: var(--color-text-light);
        }

        & strong {
            color: var(--color-accent);
            font-weight: 700;
        }
    }

    & .overview__video {
        flex: 1;
    }

    & .overview__video-placeholder {
        width: 100%;
        aspect-ratio: 16 / 9;
        background: var(--color-card-bg);
        border: 1px solid var(--color-border);
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        color: var(--color-text-muted);
        position: relative;
    }

    & .overview__points {
        display: flex;
        gap: 30px;
    }

    & .overview__point {
        flex: 1;
        background: rgba(30, 64, 175, 0.08);
        border-radius: 16px;
        padding: 40px 30px;
        text-align: center;
        transition: transform 0.3s, background 0.3s;

        &:hover {
            transform: translateY(-5px);
            background: var(--color-card-bg);
        }

        & .overview__point-icon {
            width: 70px;
            height: auto;
            margin: 0 auto 24px;
        }

        & p {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.6;
            color: var(--color-text);
        }
    }
}

.schedule {
    background: var(--color-main);

    & .schedule__table-wrap {
        overflow-x: auto;
    }

    & .schedule__table {
        width: 100%;
        border-collapse: collapse;
        background: transparent;
        border-radius: 12px;
        overflow: hidden;
        border: 1px solid var(--color-border);

        & th,
        & td {
            padding: 18px 24px;
            border: 1px solid var(--color-border);
            font-size: 15px;
        }

        & thead {
            & th {
                background: var(--color-sub);
                color: var(--color-white);
                font-weight: 600;
                text-align: center;
                border-bottom: none;
            }

            & th:nth-child(1) { width: 150px; }
            & th:nth-child(2) { width: 180px; }
        }

        & tbody {
            & td {
                text-align: center;
                color: var(--color-text-light);
            }

            & td:nth-child(3) {
                text-align: left;
            }

            & tr {
                transition: background 0.3s;
            }

            & tr:hover {
                background: var(--color-card-bg);
            }

            & tr:nth-child(even) {
                background: rgba(255, 255, 255, 0.02);
            }

            & tr:nth-child(even):hover {
                background: var(--color-card-bg);
            }

            & tr:last-child td {
                border-bottom: none;
            }
        }
    }

    & .schedule__notice {
        text-align: right;
        font-size: 13px;
        color: var(--color-text-muted);
        margin-top: 20px;
    }
}

.sponsors {
    background: var(--color-bg-section);

    & .sponsors__group {
        text-align: center;
        margin-bottom: 120px;

        &:last-child {
            margin-bottom: 0;
        }
    }

    & .sponsors__label {
        font-size: 18px;
        font-weight: 600;
        color: var(--color-text);
        margin-bottom: 30px;

        & span {
            font-weight: 400;
            color: var(--color-text-light);
            margin-left: 8px;
        }
    }

    & .sponsors__logos {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 60px;
        flex-wrap: wrap;

        & img {
            height: 50px;
            width: auto;
        }
    }

    & .sponsors__logos--host {
        & img {
            height: 40px;
        }
    }

    & .sponsors__logos--sponsor {
        & img {
            height: 45px;
        }
    }
}

.directions {
    background: var(--color-main);

    & .directions__content {
        display: flex;
        flex-direction: column;
        gap: 40px;
    }

    & .directions__info {
        display: flex;
        justify-content: center;
        gap: 60px;
        flex-wrap: wrap;
    }

    & .directions__detail {
        display: flex;
        align-items: center;
        gap: 16px;

        & dt {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-accent);
            padding: 8px 16px;
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: 4px;
        }

        & dd {
            font-size: 16px;
            color: var(--color-text-light);
        }
    }

    & .directions__map {
        border-radius: 12px;
        overflow: hidden;
        border: 1px solid var(--color-border);

        & iframe {
            display: block;
        }
    }

    & .directions__transport {
        margin-top: 60px;
        padding-top: 60px;
    }

    & .directions__transport-title {
        font-size: 22px;
        font-weight: 700;
        color: var(--color-text);
        text-align: center;
        margin-bottom: 40px;
    }

    & .directions__transport-content {
        display: flex;
        gap: 60px;
        justify-content: center;
        flex-wrap: wrap;
    }

    & .directions__transport-group {
        flex: 1;
        min-width: 280px;
        max-width: 500px;
    }

    & .directions__transport-group--inline {
        display: grid;
        grid-template-columns: 60px 1fr;
        gap: 8px 12px;
        align-items: start;
    }

    & .directions__transport-label {
        grid-column: 1;
        font-size: 14px;
        font-weight: 600;
        color: var(--color-accent);
        padding: 6px 0;
        background: var(--color-card-bg);
        border: 1px solid var(--color-border);
        border-radius: 4px;
        text-align: center;
    }

    & .directions__transport-text {
        grid-column: 2;
        font-size: 15px;
        color: var(--color-text-light);
        line-height: 1.8;
        padding-top: 6px;
    }

    & .directions__transport-text--sub {
        margin-top: 8px;
    }

    & .directions__transport-list--indent {
        grid-column: 2;
    }

    & .directions__transport-list {
        & li {
            font-size: 15px;
            color: var(--color-text-light);
            line-height: 1.8;
            margin-bottom: 8px;

            & strong {
                color: var(--color-accent);
            }
        }
    }

    & .directions__transport-list--bus {
        & li {
            display: flex;
            align-items: center;
            gap: 12px;
        }
    }

    & .directions__parking {
        margin-top: 60px;
        padding-top: 60px;
    }

    & .directions__parking-title {
        font-size: 22px;
        font-weight: 700;
        color: var(--color-text);
        text-align: center;
        margin-bottom: 30px;
    }

    & .directions__parking-notice {
        font-size: 15px;
        color: var(--color-text);
        line-height: 1.8;
        text-align: center;
        margin-bottom: 16px;
    }

    & .directions__parking-sub {
        font-size: 14px;
        color: var(--color-text-light);
        text-align: center;
        margin-bottom: 40px;
    }

    & .directions__parking-table-wrap {
        overflow-x: auto;
    }

    & .directions__parking-table {
        width: 100%;
        border-collapse: collapse;
        background: transparent;
        border-radius: 12px;
        overflow: hidden;
        border: 1px solid var(--color-border);

        & th,
        & td {
            padding: 16px 20px;
            border: 1px solid var(--color-border);
            font-size: 14px;
            text-align: center;
        }

        & thead th {
            background: var(--color-sub);
            color: var(--color-white);
            font-weight: 600;
        }

        & tbody td {
            color: var(--color-text-light);
        }

        & tbody tr:nth-child(even) {
            background: rgba(255, 255, 255, 0.02);
        }

        & tbody tr:hover {
            background: var(--color-card-bg);
        }

        & tbody tr:nth-child(even):hover {
            background: var(--color-card-bg);
        }
    }

    & .directions__parking-notice-small {
        font-size: 13px;
        color: var(--color-text-muted);
        text-align: right;
        margin-top: 16px;
    }
}

.bus-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-white);
    padding: 4px 12px;
    border-radius: 4px;
    flex-shrink: 0;
}

.bus-tag--blue {
    background: #3d5bab;
}

.bus-tag--green {
    background: #5bb025;
}

.bus-tag--yellow {
    background: #f5a623;
}

.directions__bus-stop {
    margin-bottom: 24px;

    &:last-child {
        margin-bottom: 0;
    }
}

.directions__bus-stop-name {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 12px;
    padding-left: 4px;

    strong {
        color: var(--color-accent);
    }
}

.footer {
    background: var(--color-bg-footer);
    color: var(--color-white);
    padding: 60px 0;

    & .footer__inner {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
        text-align: center;
    }

    & .footer__contact {
        display: inline-block;
    }

    & .footer__title {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 20px;
        color: var(--color-accent);
    }

    & .footer__info {
        margin-bottom: 20px;

        & li {
            font-size: 15px;
            line-height: 1.8;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
    }

    & .footer__icon {
        font-size: 14px;
    }

    & .footer__notice {
        font-size: 13px;
        color: var(--color-text-muted);
        line-height: 1.6;
    }
}

@media (max-width: 768px) {
    .header {
        height: auto;
        padding: 5px 20px 15px;

        & .header__logo {
            position: static;
            transform: none;
            text-align: center;
            width: 100%;
            margin-bottom: 10px;
            padding: 10px 0;
            font-size: 16px;
        }

        & .header__inner {
            width: 100%;
        }
    }

    .gnb {
        width: 100%;

        & .gnb__list {
            justify-content: center;
            gap: 15px;
            flex-wrap: nowrap;
        }

        & .gnb__link {
            font-size: 14px;

            & span {
                font-size: 11px;
            }
        }
    }

    .visual {
        padding-top: 120px;

        & .visual__bg img {
            object-position: center 70px;
        }

        & .visual__title {
            font-size: 32px;
        }

        & .visual__subtitle {
            font-size: 16px;
        }

        & .visual__date {
            font-size: 20px;
        }

        & .visual__location {
            font-size: 14px;
        }

        & .visual__btn {
            padding: 14px 40px;
            font-size: 16px;
        }
    }

    .mo-only {
        display: block;
    }

    .quick-links {
        & .quick-links__item {
            padding: 25px 15px;
            gap: 16px;
        }

        & .quick-links__inner {
            flex-direction: row;
        }

        & .quick-links__icon {
            width: 50px;
            height: auto;
        }

        & .quick-links__info {
            & strong {
                font-size: 14px;
            }

            & span {
                font-size: 13px;
            }
        }
    }

    .section__inner {
        padding: 60px 20px;
    }

    .section__title {
        font-size: 26px;
    }

    .overview {
        & .overview__content {
            flex-direction: column;
            gap: 40px;
        }

        & .overview__points {
            flex-direction: column;
            gap: 20px;
        }
    }

    .schedule {
        & .schedule__table {
            & th,
            & td {
                padding: 15px;
            }
        }
    }

    .directions {
        & .directions__info {
            flex-direction: column;
            gap: 20px;
            align-items: flex-start;
        }

        & .directions__detail {
            flex-direction: row;
            text-align: left;
            gap: 12px;
        }

        & .directions__transport-content {
            flex-direction: column;
            gap: 40px;
        }

        & .directions__transport-group {
            max-width: none;
            align-items: center;

            .directions__transport-text {
                padding-top: 0;
            }
        }

        & .directions__parking-table {
            font-size: 13px;

            & th,
            & td {
                padding: 12px 10px;
            }
        }

        & .directions__parking-notice-small {
            text-align: left;
        }
    }

    .footer {
        padding: 40px 0;

        & .footer__info {
            & li {
                justify-content: center;
            }
        }
    }
}