/* Page 1 reference composition. Functional HTML remains live and clickable. */
.hero-slide {
    background:
        linear-gradient(180deg, rgba(1, 7, 22, .08), rgba(1, 7, 22, .22)),
        url("../assets/images/page1-digital-city-network.png") center center / cover no-repeat !important;
}

.hero-slide::after {
    z-index: 2;
    background:
        radial-gradient(circle at 50% 42%, transparent 0 26%, rgba(0, 5, 18, .08) 55%, rgba(0, 4, 15, .46) 100%);
}

.hero-slide .floating-icon,
.hero-slide .hero-glow {
    display: none !important;
}

.hero-slide .particle-field {
    z-index: 3;
    opacity: .52;
    mix-blend-mode: screen;
}

.hero-slide .hero-content {
    position: absolute;
    z-index: 10;
    top: 70px;
    left: 50%;
    display: flex;
    width: 1120px;
    flex-direction: column;
    align-items: center;
    transform: translateX(-50%);
    text-align: center;
}

.hero-slide .course-label {
    position: relative;
    display: flex;
    min-width: 520px;
    align-items: center;
    justify-content: center;
    margin: 0 0 34px;
    padding: 0;
    border: 0;
    border-radius: 0;
    color: #bac9ff;
    background: transparent;
    box-shadow: none;
    font-size: 25px;
    font-weight: 500;
    line-height: 1;
    letter-spacing: 12px;
    backdrop-filter: none;
}

.hero-slide .course-label::before,
.hero-slide .course-label::after {
    width: 38px;
    height: 1px;
    margin: 0 28px 0 17px;
    background: linear-gradient(90deg, transparent, rgba(45, 164, 255, .8));
    content: "";
}

.hero-slide .course-label::after {
    margin: 0 17px 0 28px;
    background: linear-gradient(90deg, rgba(45, 164, 255, .8), transparent);
}

.hero-slide .unit-number {
    display: flex;
    min-width: 212px;
    min-height: 58px;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    margin: 0 0 28px;
    padding: 0 34px;
    border: 1px solid #27d6ff;
    border-radius: 999px;
    color: #a6f8ff;
    background: linear-gradient(180deg, rgba(9, 64, 111, .72), rgba(4, 33, 70, .72));
    box-shadow: 0 0 24px rgba(19, 169, 255, .22), inset 0 0 18px rgba(30, 174, 255, .12);
    font-size: 31px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: 4px;
}

.reveal .hero-slide .hero-title {
    margin: 0;
    color: #f5f8ff;
    font-size: 92px;
    font-weight: 850;
    line-height: 1.02;
    letter-spacing: -3px;
    text-align: center;
    text-shadow: 0 7px 18px rgba(0, 8, 29, .75), 0 0 24px rgba(51, 149, 255, .12);
}

.reveal .hero-slide .hero-title span {
    color: transparent;
    background: linear-gradient(90deg, #f4f7ff 0%, #85c8ff 35%, #24e6ec 100%);
    -webkit-background-clip: text;
    background-clip: text;
    filter: drop-shadow(0 7px 10px rgba(0, 19, 54, .72));
}

.hero-slide .title-translation {
    margin: 7px 0 0;
    color: #b9eeff;
    font-size: 24px;
    line-height: 1.3;
    text-align: center;
}

.hero-slide .hero-divider {
    position: relative;
    width: 178px;
    height: 2px;
    margin: 30px 0 30px;
    background: linear-gradient(90deg, transparent, #20e7ff 26%, #b8ffff 50%, #20e7ff 74%, transparent);
    box-shadow: 0 0 13px #1bdfff;
}

.hero-slide .hero-divider::after {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #eaffff;
    box-shadow: 0 0 14px 5px #1be9ff;
    content: "";
    transform: translate(-50%, -50%);
}

.reveal .hero-slide .hero-subtitle {
    max-width: 720px;
    margin: 0;
    color: #f4f6ff;
    font-size: 27px;
    font-weight: 450;
    line-height: 1.45;
    text-align: center;
    text-shadow: 0 2px 8px rgba(0, 4, 16, .8);
}

.hero-slide .subtitle-translation {
    max-width: 760px;
    margin: 5px 0 0;
    color: #b9eeff;
    font-size: 21px;
    line-height: 1.35;
    text-align: center;
}

.hero-slide .hero-quest-line {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    margin-top: 32px;
    color: #31e8f1;
    font-size: 18px;
    font-weight: 650;
    line-height: 1;
    letter-spacing: 7px;
    text-shadow: 0 0 13px rgba(34, 226, 255, .52);
}

.hero-slide .hero-quest-line i {
    color: #55f4ff;
    font-size: 14px;
    font-style: normal;
    letter-spacing: 0;
}

.hero-slide .start-button {
    position: relative;
    display: flex;
    width: 406px;
    min-height: 80px;
    align-items: center;
    justify-content: center;
    gap: 34px;
    margin: 50px 0 0;
    padding: 0 38px;
    border: 1px solid #7cffff;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(100deg, #08bfc4, #087ef6 82%);
    box-shadow: 0 0 22px rgba(13, 225, 241, .58), 0 14px 32px rgba(0, 25, 74, .55), inset 0 1px 0 rgba(255, 255, 255, .35);
    font-size: 25px;
    font-weight: 800;
    letter-spacing: .5px;
}

.hero-slide .start-button::after {
    position: absolute;
    inset: -16px -34px;
    z-index: -1;
    border-radius: 50%;
    background: radial-gradient(ellipse, rgba(23, 210, 255, .22), transparent 68%);
    content: "";
    pointer-events: none;
}

.hero-slide .start-button:hover {
    border-color: #d8ffff;
    background: linear-gradient(100deg, #10d7d4, #178cff 82%);
    box-shadow: 0 0 30px rgba(39, 237, 248, .7), 0 15px 34px rgba(0, 25, 74, .58);
    transform: translateY(-2px);
}

.hero-slide .button-arrow {
    font-size: 34px;
    font-weight: 400;
}

.hero-slide .hero-footer {
    left: 50px;
    bottom: 32px;
    gap: 10px;
    padding-left: 14px;
    color: #c4d1ec;
    font-size: 16px;
    letter-spacing: 0;
}

.hero-slide .hero-footer::before {
    position: absolute;
    left: 0;
    width: 2px;
    height: 28px;
    background: #2bf2ee;
    box-shadow: 0 0 8px rgba(43, 242, 238, .65);
    content: "";
}

.hero-slide .footer-dot {
    background: #2bf2ee;
}

.hero-slide .navigation-hint {
    right: 50px;
    bottom: 30px;
    gap: 12px;
    color: #c4d1ec;
    font-size: 16px;
}

.hero-slide .navigation-hint .hero-help {
    display: inline-flex;
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
    margin-right: 6px;
    border: 1px solid #a7c6ff;
    border-radius: 50%;
    color: #e5efff;
    font-size: 19px;
    font-weight: 700;
}

.hero-slide .navigation-hint .key {
    width: 37px;
    height: 30px;
    border: 1px solid rgba(169, 205, 255, .72);
    border-radius: 7px;
    color: #eaf3ff;
    background: rgba(5, 20, 48, .76);
    font-size: 21px;
}

@media (max-height: 760px) {
    .hero-slide .hero-content {
        top: 40px;
        transform: translateX(-50%) scale(.88);
        transform-origin: top center;
    }
}

/* Final vertical rhythm: airier content stack with a lower, safe CTA. */
.hero-slide .course-label {
    margin-bottom: 40px;
}

.hero-slide .unit-number {
    margin-bottom: 36px;
}

.reveal .hero-slide .hero-title {
    line-height: 1.08;
}

.hero-slide .hero-divider {
    margin-top: 38px;
    margin-bottom: 38px;
}

.reveal .hero-slide .hero-subtitle {
    line-height: 1.6;
}

.hero-slide .hero-quest-line {
    margin-top: 40px;
}

.hero-slide .start-button {
    margin-top: 60px;
}