.welcome-screen {
    height: 100vh;
    width: 100%;
    /* แนะนำให้ใช้รูปภาพหน้าวิทยาลัยสวยๆ */
    background: url('/assets/images/481987011_1055857143243689_5956325915564872677_n.jpg') no-repeat center center/cover;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    /* ไล่สีจากน้ำเงินเข้มไปใส เพื่อให้รูปพื้นหลังยังดูเด่น */
    background: linear-gradient(135deg, rgba(0, 51, 153, 0.8) 0%, rgba(0, 0, 0, 0.6) 100%);
    z-index: 1;
}

.content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
}

.main-logo {
    width: 150px;
    margin-bottom: 25px;
    /* ทำแสงฟุ้งรอบโลโก้ให้ดูเด่น */
    filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.4));
}

.text-group h1 {
    font-size: 3rem;
    margin: 0;
    font-weight: 600;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.line-divider {
    width: 100px;
    height: 4px;
    background-color: var(--white);
    margin: 20px auto;
}

.motto {
    display: block;
    font-size: 1.2rem;
    font-weight: 200;
    letter-spacing: 1px;
}

.action-buttons {
    margin-top: 50px;
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn-enter {
    background-color: var(--white);
    color: var(--nbtc-blue);
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn-sub {
    background-color: transparent;
    color: var(--white);
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 50px;
    border: 2px solid var(--white);
    font-weight: 400;
    transition: all 0.3s ease;
}

.btn-enter:hover {
    background-color: var(--nbtc-blue);
    color: var(--white);
    transform: translateY(-3px);
}

.btn-sub:hover {
    background-color: rgba(255,255,255,0.2);
    transform: translateY(-3px);
}