body {
    background-color: #323339;
    font-family: "Do Hyeon", sans-serif;
    font-weight: 400;
    font-style: normal;
    color: #fff;
    font-size: 20px;
    text-align: center;
    margin: 0;
}

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

.cause {
  font-family: "Cause", cursive;
  font-optical-sizing: auto;
  font-weight: 700;
  font-style: normal;
}


.container {
    padding: 15px 20px;
}



.fade-up {
    opacity: 0;
    transform: translateY(10px);
        transition:
        opacity 0.4s ease,
        transform 0.4s ease;
}


.fade-up.show {
    opacity: 1;
    transform: translateY(0);
}
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.5s; }


.maincard {
    max-width: 900px;

    margin: auto;
    padding: 5px;

    border-radius: 20px;

    background: rgba(20, 27, 40, 0.75);

    border: 1px solid rgba(255,255,255,0.08);

    backdrop-filter: blur(10px);

    box-shadow:
        0 0 30px rgba(0,0,0,0.4),
        inset 0 0 20px rgba(255,255,255,0.02);
}


.maincard h1 {
    text-align: center;
    color: #00ff6a;

    font-size: 55px;
    margin-bottom: 30px;

    text-shadow: 0 0 12px rgba(95, 255, 32, 0.4);
}


.maincard_line {
    width: 90%;
    height: 4px;

    margin: 0 auto 30px auto;

    border-radius: 999px;

    background: #4d9fff;

    box-shadow: 0 0 12px #4d9fff;
}

.maincard_content {
    text-align: center;
}


.maincard_text {
    color: #fffd91;
    line-height: 0.8;
    font-size: 18px;
}

.sub-cards {
    max-width: 900px;

    margin: 40px auto;

    display: flex;
    flex-direction: column;

    gap: 24px;
}

.sub-card {
    position: relative;

    overflow: visible;

    width: 100%;

    box-sizing: border-box;

    min-height: 140px;

    padding: 20px;

    display: flex;
    flex-direction: column;

    justify-content: center;
    align-items: center;

    text-align: center;

    background:
        linear-gradient(
            90deg,
            rgba(35,45,65,0.95) 0%,
            rgba(35,45,65,0.88) 35%,
            rgba(20,25,40,0.55) 100%
        );

    border: 1px solid rgba(120,170,255,0.25);

    border-radius: 12px;

    backdrop-filter: blur(10px);

    box-shadow:
        0 0 30px rgba(0,0,0,0.25);

    transition:
        transform 0.25s ease,
        border-color 0.25s ease,
        box-shadow 0.25s ease;
}

.sub-card::before {
    content: "";

    position: absolute;
    inset: 0;

    background: url("assets/bg.png") center/cover no-repeat;

    opacity: 0.25;

    border-radius: inherit;

    z-index: 0;
}

.sub-card::after {
    content: "";

    position: absolute;
    inset: 0;

    background:
        linear-gradient(
            90deg,
            rgba(20,25,35,0.88) 0%,
            rgba(20,25,35,0.55) 45%,
            rgba(20,25,35,0.15) 100%
        );

    border-radius: inherit;

    z-index: 1;
}

.sub-card * {
    position: relative;
    z-index: 2;
}

.sub-card .hover-tag {
    position: absolute;

    top: -28px;
    left: 50%;

    transform:
        translateX(-50%)
        scale(0.9);

    padding: 14px 34px;

    border-radius: 12px;

    background: rgba(10,15,25,0.78);

    border: 1px solid rgba(120,170,255,0.35);

    backdrop-filter: blur(16px);

    color: white;

    font-size: 22px;
    font-weight: 600;

    opacity: 0;

    pointer-events: none;

    transition:
        opacity 0.25s ease,
        transform 0.25s ease;

    box-shadow:
        0 0 30px rgba(0,0,0,0.35);

    z-index: 10;

    white-space: nowrap;
}

.sub-card:hover .hover-tag {
    opacity: 1;

    transform:
        translateX(-50%)
        scale(1);
}

@media (max-width: 768px) {
    .sub-cards {
        grid-template-columns: 1fr;
    }
}

.topbar {
    position: sticky;

    top: 0;
    left: 0;

    z-index: 999;

    width: 100%;

    height: 70px;

    display: flex;
    align-items: center;

    padding: 0 30px;

    box-sizing: border-box;

    background: #2a2c30;

    backdrop-filter: blur(14px);

    border:
        2px solid rgba(255,255,255,0.10);

    border-top: none;
    border-left: none;
    border-right: none;

    box-shadow:
        0 0 25px rgba(0,0,0,0.2);

    margin: 0;
}

.topbar_logo {
    font-size: 34px;

    text-decoration: none;


    transition:
        transform 0.2s ease,
        opacity 0.2s ease;
}

.topbar_logo:hover {
    transform: scale(1.05);

    opacity: 0.85;
}