* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 
*font*
*/
@font-face {
    font-family: 'vazir';
    src: url('../font/Farsi-Digits-Without-Latin/Vazir-FD-WOL.woff') format('woff'),
        url('../font/Farsi-Digits-Without-Latin/Vazir-FD-WOL.woff2') format('woff2'),
        url('../font/Farsi-Digits-Without-Latin/Vazir-FD-WOL.ttf') format('truetype');
    font-style: normal;
    font-weight: normal;
}

/*
*public style*
*/

:root {
    --clr-primary-1: #395b64;
    --clr-primary-2: #80A1BA;
    --clr-primary-3: #a5c9ca;
    --clr-gray-1: #4d4d4d;
    --clr-gray-2: #6d6d6d;
    --clr-gray-3: #969696;
    --clr-gray-4: #bdbdbd;
    --clr-white: white;
    --ff-vazir: 'vazir', sans-serif;
    --transition: all 0.3s linear;
    --shadow-dark: rgba(0, 0, 0, 0.6);
    --shadow-light: rgba(0, 0, 0, 0.3);
    --radius: 0.7rem;
}

body {
    background: var(--clr-white);
    color: var(--clr-gray-1);
    font-family: var(--ff-vazir);
    font-size: 0.85rem;
    line-height: 1.5;
}

ul {
    list-style-type: none;
}

a {
    text-decoration: none;
}

img {
    width: 100%;
    display: block;
}

h1,
h2,
h3,
h4 {
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 1.75rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1rem;
}

p {
    margin-bottom: 1.25rem;
    color: var(--clr-gray-2);
}

.btn {
    background: var(--clr-primary-2);
    color: var(--clr-white);
    padding: 0.3rem 0.7rem;
    display: inline-block;
    transition: var(--transition);
    font-size: 0.8rem;
    border: 2px solid transparent;
    cursor: pointer;
    box-shadow: 0 1px 3px var(--shadow-dark);
    border-radius: var(--radius);
}

.btn:hover {
    color: var(--clr-primary-1);
    background: var(--clr-primary-3);
}

.section {
    padding: 5rem 0;
}

.section_title {
    margin-bottom: 4rem;
    text-align: center;
}

.section_title span {
    color: var(--clr-primary-2);
}

.section_center {
    width: 90vw;
    margin: 0 auto;
}

/* 
*navbar*
*/
.navbar {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    background: var(--clr-white);
    box-shadow: var(--shadow-dark);
    z-index: 2;
}

.navbar_section {
    width: 100%;
    max-width: 1170px;
    margin: 0 auto;
}

.nav_header {
    display: flex;
    padding: 1rem 2rem;
    justify-content: space-between;
    align-items: center;
}

.nav_header h3 {
    margin-bottom: 0;
}

.nav_toggle {
    font-size: 2rem;
    background: transparent;
    border: transparent;
    color: var(--clr-primary-1);
    transition: var(--transition);
}

.nav_toggle:hover {
    transform: scale(1.3);
    color: var(--clr-primary-2);
}

.nav_links {
    height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.show_links {
    height: 21rem;
}

.nav_link {
    cursor: pointer;
    display: block;
    padding: 1rem 2rem;
    color: var(--clr-primary-1);
    transition: var(--transition);
}

.nav_link:hover {
    color: var(--clr-primary-3);
    background: var(--clr-primary-1);
    padding-right: 4rem;
}

.nav_icons {
    display: none;
}

/* 
*hero*
*/

.hero {
    min-height: 100vh;
    background: var(--clr-primary-2);
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero_banner {
    padding: 0 3rem;
    text-align: center;
}

.hero_banner h1 {
    margin-bottom: 3rem;
    color: var(--clr-white);
}

.hero_banner p {
    max-width: 35rem;
    margin-bottom: 3rem;
    color: var(--clr-white);
}

.hero_btn {
    padding: 0.5rem 1.5rem;
    background: var(--clr-white);
    font-size: 1rem;
    color: var(--clr-primary-2);
}

.hero_btn:hover {
    background: transparent;
    border: 2px solid var(--clr-white);
    color: var(--clr-white);
}

/* 
*about*
*/

.about_img {
    margin-bottom: 2rem;
}

.about_img img {
    border-radius: var(--radius);
}

/* 
*services*
*/
.services {
    background: var(--clr-primary-3);
}

.service {
    text-align: center;
    margin-bottom: 3rem;
}

.service_icon {
    background: var(--clr-primary-1);
    color: var(--clr-white);
    font-size: 2rem;
    padding: 0.5rem;
    display: inline-block;
    margin-bottom: 2rem;
    border-radius: var(--radius);
}

.service_text p {
    max-width: 20rem;
    margin: 0 auto;
}

/* 
*blog*
*/
.blog_card {
    background: var(--clr-primary-3);
    box-shadow: var(--shadow-light);
    margin-bottom: 3rem;
    border-radius: var(--radius);
    overflow: hidden;
}

.blog_card:hover {
    box-shadow: var(--shadow-dark);
    transform: scale(1.03);
}

.blog_img {
    position: relative;
}

.blog_img img {
    height: 15rem;
    object-fit: cover;
}

.blog_img p {
    position: absolute;
    right: 0;
    bottom: 0;
    background: var(--clr-primary-1);
    color: var(--clr-white);
    padding: 0.3rem 0.5rem;
    margin-bottom: 0;
    border-top-left-radius: var(--radius);
}

.blog_info {
    padding: 1.3rem 1.5rem;
}

.blog_title,
.blog_footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.blog_footer p {
    margin-bottom: 0;
    color: var(--clr-primary-1);
}

.blog_footer a {
    color: var(--clr-primary-1);
}

.blog_btn {
    text-align: center;
}

/* 
*contact*
*/
.contact {
    background: var(--clr-primary-3);
}

.contact_title h3,
.contact_title p {
    color: var(--clr-white);
}

.contact_title {
    padding-bottom: 2rem;
}

.contact_form form {
    display: flex;
}

.form_control {
    flex: 1 1 auto;
    border-top-right-radius: var(--radius);
    border-bottom-right-radius: var(--radius);
    color: var(--clr-primary-1);
}

.form_control:focus {
    border: 1px solid var(--clr-primary-1);
    box-shadow: 0 2px 5px var(--clr-primary-1);
    outline: none;
}

.form_control::placeholder {
    font-family: var(--ff-vazir);
    color: var(--clr-primary-1);
}

.btn_submit {
    border-top-left-radius: var(--radius);
    border-bottom-left-radius: var(--radius);
    background: var(--clr-primary-1);
    font-family: var(--ff-vazir);
    color: var(--clr-white);
    cursor: pointer;
    transition: var(--transition);
}

.btn_submit:hover {
    background: var(--clr-primary-2);
    color: var(--clr-primary-1);
}

.form_control,
.btn_submit {
    padding: 0.4rem 0.8rem;
    border: 2px solid transparent;
    font-size: 1rem;
}

/* 
*gallery*
*/

.gallery_item {
    position: relative;
    background: var(--clr-primary-1);
    transition: var(--transition);
}

.gallery_item:hover {
    border-radius: var(--radius);
}

.gallery_item:hover a {
    opacity: 1;
}

.gallery_item:hover img {
    opacity: 0.5;
}

.gallery_item img {
    transition: var(--transition);
    object-fit: cover;
    height: 18rem;
}

.gallery_item a {
    position: absolute;
    top: 50%;
    left: 50%;
    color: var(--clr-white);
    font-size: 2rem;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: var(--transition);
}

/* 
*footer*
*/
footer {
    background: #0e1d30;
    padding: 0 3rem;
    text-align: center;
}

.footer_links , .footer_icons{
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.footer_link {
    color: var(--clr-white);
    font-size: 1rem;
    margin-right: 1rem;
    transition: var(--transition);
}

.footer_icon {
    font-size: 2rem;
    margin: 0 1rem;
    color: var(--clr-primary-1);
}

.footer_link:hover , .footer_icon:hover {
    color: var(--clr-primary-2);
}

.copyright , .copyright a{
    color: var(--clr-white);
}


/* 
*responsive*
*/

@media screen and (min-width:576px) {

    /* 
    *services*
    */
    .services_section {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .service {
        flex: 0 0 calc(50% - 1rem);
    }
}

@media screen and (min-width:768px) {

    body {
        font-size: 1rem;
    }

    h1,
    h2,
    h3,
    h4 {
        line-height: 1;
    }

    h1 {
        font-size: 3rem;
    }

    h2 {
        font-size: 2rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    h4 {
        font-size: 1.25rem;
    }

    /* 
    *hero*
    */

    .hero {
        background: linear-gradient(rgba(57, 91, 100, 0.7), rgba(0, 0, 0, 0.7)), url("../image/header.jpg") center/cover no-repeat;
    }

    .hero_banner {
        padding: 0;
    }

    .hero_banner p {
        max-width: 45rem;
    }

    /* 
    *blog*
    */
    .blog_section {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .blog_card {
        flex: 0 0 calc(50% - 1rem);
    }

    /* 
    *gallery*
    */
    .gallery_section {
        display: flex;
        flex-wrap: wrap;
    }

    .gallery_item {
        flex: 0 0 50%;
    }
}

@media screen and (min-width:992px) {
    .section_center {
        width: 95vw;
        max-width: 1170px;
    }

    /* 
    *navbar*
    */
    .navbar {
        padding: 1.5rem 2.5rem;
    }

    .navbar_section {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .nav_header {
        padding: 0;
    }

    .nav_links {
        height: auto;
        display: flex;
    }

    .nav_link {
        padding: 0 0 0.5rem 0 ;
        margin-right: 1rem;
        transition: var(--transition);
        border-bottom: 2px solid transparent;
    }

    .nav_link:hover {
        padding: 0;
        color: var(--clr-primary-3);
        background: transparent;
        border-bottom: 2px solid var(--clr-primary-3);
    }

    .nav_icons {
        display: flex;
        gap: 1rem;
    }

    .nav_icon  {
        font-size: 1.5rem;
        color: var(--clr-primary-1);
        transition: var(--transition);
    }

    .nav_icon:hover {
        color: var(--clr-primary-2);
    }

    .nav_toggle {
        display: none;
    }

    /* 
    *about*
    */
    .about_section {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .about_img,
    .about_text {
        flex: 0 0 calc(50% - 2rem);
    }

    /* 
    *services*
    */
    .service {
        flex: 0 0 calc(33.3% - 1rem);
    }

    /* 
    *contact*
    */
    .contact_section {
        display: flex;
        gap: 3rem;
    }

    .contact_title {
        padding-bottom: 0;
    }

    .contact_form {
        align-self: center;
        flex: 1 1 auto;
    }

    /* 
    *gallery*
    */
    .gallery_item {
        flex: 0 0 25%;
    }
}

@media screen and (min-width:1170px) {
    /* 
    *about*
    */

    .about_img {
        position: relative;
    }

    .about_img::before {
        border: 0.5rem solid var(--clr-primary-2);
        box-sizing: border-box;
        position: absolute;
        height: 100%;
        width: 100%;
        top: -1rem;
        right: -1rem;
        z-index: -1;
        content: "";
        border-radius: var(--radius);
    }

    /* 
    *services*
    */
    .service {
        display: flex;
        text-align: right;
    }

    .service_text {
        padding-right: 1rem;
    }

    .service_icon {
        align-self: flex-start;
    }

    .service_text h4 {
        margin-bottom: 0.5rem;
    }

    /* 
    *blog*
    */
    .blog_card {
        flex: 0 0 calc(33.3% - 1rem);
    }
}