/* ==========================================
   Login Page Style (Bootstrap 4)
   ========================================== */

body {
    margin-top: 0 !important;
}

/* ตกแต่งรูปทรงและเงา */
.text-shadow { text-shadow: 0 2px 4px rgba(0,0,0,0.2); }
.drop-shadow { filter: drop-shadow(0 4px 6px rgba(0,0,0,0.15)); }
.opacity-100-hover:hover { opacity: 1 !important; }

/* 
 * ดึงรูปมุมซ้ายบนและขวาล่างไปแปะชิดขอบจอจริง (แก้ปัญหา BS4 ไม่มี top-0, left-0, bottom-0, right-0)
 */
.f-t {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
    background-image: url('../images/bg-top-left.svg');
    height: 225px; 
    width: 300px;
    background-repeat: no-repeat;
    opacity: 0.6;
}

.f-b {
    position: absolute;
    bottom: 0;
    right: 0;
    z-index: 0;
    background-image: url('../images/Untitled-1.png');
    height: 542px; 
    width: 500px;
    background-repeat: no-repeat;
    background-position: right bottom;
    opacity: 0.6;
}

/* 
 * ตกแต่ง Input Group ขยายขนาดให้ใหญ่ขึ้นและรักษาเส้นขอบเดิมไว้
 */
.login-card-body .input-group-text {
    background-color: #f8f9fa;
    border-color: #ced4da;
    border-top-left-radius: 0.4rem;
    border-bottom-left-radius: 0.4rem;
    padding-left: 1.15rem;
    padding-right: 1.15rem;
    font-size: 1.15rem;
}

.login-card-body .form-control {
    border-color: #ced4da;
    border-top-right-radius: 0.4rem;
    border-bottom-right-radius: 0.4rem;
    padding-top: 0.8rem;
    padding-bottom: 0.8rem;
    font-size: 1.05rem;
    height: auto;
}

/* จัดระเบียบตัว Checkbox "จดจำฉัน..." ใช้ Flexbox ไม่ให้ชนหรือทับกัน */
.login-card-body .form-group,
.login-card-body .control-group {
    text-align: left !important;
}

.login-card-body .form-check {
    display: flex !important;
    align-items: flex-start !important;
    padding-left: 0 !important;
    margin-left: 0 !important;
    text-align: left !important;
}

.login-card-body .form-check-input {
    position: static !important;
    margin-top: 0.2rem !important;
    margin-right: 0.65rem !important;
    margin-left: 0 !important;
    width: 1.15rem !important;
    height: 1.15rem !important;
    flex-shrink: 0 !important;
    cursor: pointer;
}

.login-card-body .form-check-label {
    cursor: pointer;
    line-height: 1.35;
    user-select: none;
}

/* แสดงข้อความ Error สีแดง */
.login-card-body .has-error .invalid-feedback,
.login-card-body .form-control.is-invalid ~ .invalid-feedback {
    display: block;
    text-align: left;
    margin-top: 0.35rem;
}