:root {
    --entrance-ink: #102d45;
    --entrance-gold: #b88a3d;
    --entrance-paper: #f6f4ee;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body.has-entrance {
    overflow: hidden;
}

.entrance {
    position: fixed;
    z-index: 2000;
    inset: 0;
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 100vh;
    min-height: 100svh;
    overflow-y: auto;
    color: var(--entrance-ink);
    background-color: #dce5e8;
    isolation: isolate;
    font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
    background-image: url("../img/entrance-960.webp");
    background-position: 63% center;
    background-repeat: no-repeat;
    background-size: cover;
    opacity: 1;
    transition: opacity 420ms ease, visibility 420ms ease;
}

.entrance.is-leaving {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
}

.entrance::before {
    position: absolute;
    z-index: -1;
    inset: 0;
    content: "";
    background: linear-gradient(90deg, rgba(246, 244, 238, 0.98) 0%, rgba(246, 244, 238, 0.9) 33%, rgba(246, 244, 238, 0.08) 65%);
    pointer-events: none;
}

.entrance__content {
    width: min(48rem, 52vw);
    margin-left: clamp(2rem, 7.2vw, 9rem);
    padding: 3rem 0;
    text-align: center;
    animation: entrance-reveal 850ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.entrance__year {
    display: grid;
    place-items: center;
    width: 5.6rem;
    height: 5.6rem;
    margin: 0 auto 1rem;
    border: 1px solid rgba(16, 45, 69, 0.58);
    border-radius: 50%;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.35rem;
    letter-spacing: 0.08em;
}

.entrance__english {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1rem, 1.5vw, 1.45rem);
    font-weight: 600;
    letter-spacing: 0.11em;
}

.entrance__rule {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    width: min(18rem, 70%);
    margin: 1.35rem auto 1.5rem;
}

.entrance__rule::before,
.entrance__rule::after {
    height: 1px;
    content: "";
    flex: 1;
    background: var(--entrance-gold);
}

.entrance__rule span {
    width: 0.48rem;
    height: 0.48rem;
    border: 1px solid var(--entrance-gold);
    transform: rotate(45deg);
}

.entrance__title {
    margin: 0;
    font-family: "Noto Serif TC", "PMingLiU", serif;
    font-size: clamp(2.6rem, 4.25vw, 4.6rem);
    font-weight: 700;
    letter-spacing: 0.1em;
    line-height: 1.2;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.55);
}

.entrance__subtitle {
    margin: 1rem 0 2.5rem;
    font-size: clamp(1rem, 1.3vw, 1.25rem);
    font-weight: 600;
    letter-spacing: 0.24em;
}

.entrance__button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 1.25rem;
    min-width: 12.5rem;
    min-height: 3.5rem;
    padding: 0.9rem 1.3rem 0.9rem 1.8rem;
    border: 1px solid rgba(255, 255, 255, 0.48);
    color: #fff;
    background: var(--entrance-ink);
    box-shadow: 0 0.8rem 2rem rgba(16, 45, 69, 0.2);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-decoration: none;
    transition: color 180ms ease, background-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.entrance__button-arrow {
    font-size: 1.35rem;
    line-height: 1;
    transition: transform 180ms ease;
}

.entrance__button:hover {
    color: var(--entrance-ink);
    background: var(--entrance-paper);
    box-shadow: 0 1rem 2.3rem rgba(16, 45, 69, 0.25);
    transform: translateY(-2px);
}

.entrance__button:hover .entrance__button-arrow {
    transform: translateX(0.25rem);
}

.entrance__button:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 4px;
    box-shadow: 0 0 0 7px var(--entrance-ink);
}

.entrance__audio-note {
    margin: 0.85rem 0 0;
    color: rgba(16, 45, 69, 0.75);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
}

@keyframes entrance-reveal {
    from {
        opacity: 0;
        transform: translateY(1rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (min-width: 700px) {
    .entrance {
        background-image: url("../img/entrance-1280.webp");
    }
}

@media (min-width: 1200px) {
    .entrance {
        background-image: url("../img/entrance-1920.webp");
        background-position: center;
    }
}

@media (max-width: 699.98px) {
    .entrance {
        align-items: flex-start;
        background-position: 68% center;
    }

    .entrance::before {
        background: linear-gradient(180deg, rgba(246, 244, 238, 0.98) 0%, rgba(246, 244, 238, 0.86) 32%, rgba(246, 244, 238, 0.08) 60%);
    }

    .entrance__content {
        width: 100%;
        margin: 0;
        padding: max(2.25rem, env(safe-area-inset-top)) 1.25rem 2rem;
    }

    .entrance__year {
        width: 4.25rem;
        height: 4.25rem;
        margin-bottom: 0.7rem;
        font-size: 1rem;
    }

    .entrance__english {
        font-size: 0.82rem;
        letter-spacing: 0.08em;
    }

    .entrance__rule {
        margin-block: 0.85rem 1rem;
    }

    .entrance__title {
        font-size: clamp(2rem, 10.5vw, 2.7rem);
        letter-spacing: 0.05em;
    }

    .entrance__title-line {
        display: block;
    }

    .entrance__title-dot {
        display: none;
    }

    .entrance__subtitle {
        margin: 0.7rem 0 1.5rem;
        font-size: 0.95rem;
        letter-spacing: 0.16em;
    }

    .entrance__button {
        min-width: 11.5rem;
        min-height: 3.25rem;
    }
}

@media (max-height: 680px) and (max-width: 699.98px) {
    .entrance__content {
        padding-top: 1.25rem;
    }

    .entrance__year {
        width: 3.5rem;
        height: 3.5rem;
    }

    .entrance__subtitle {
        margin-bottom: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .entrance__content {
        animation: none;
    }

    .entrance__button,
    .entrance__button-arrow,
    .entrance {
        transition: none;
    }
}