:root {
    /**
    *  colors
    */
    --light-steel-blue: hsl(218, 33%, 77%);
    --royal-blue-light: hsl(225, 68%, 53%);
    --flickr-blue_30: hsla(225, 68%, 53%, 0.3);
    --carolina-blue: hsl(201, 92%, 47%);
    --oxford-blue-1: hsl(218, 70%, 18%);
    --oxford-blue-2: hsl(217, 100%, 12%);
    --oxford-blue-3: hsl(218, 71%, 11%);
    --gainsboro_50: hsla(0, 0%, 85%, 0.5);
    --lavender-web: hsl(225, 67%, 91%);
    --sonic-silver: hsl(0, 0%, 47%);
    --light-gray: hsl(0, 0%, 84%);
    --cultured: hsl(0, 0%, 97%);
    --black_10: hsla(0, 0%, 0%, 0.1);
    --black_8: hsla(0, 0%, 0%, 0.08);
    --white: hsl(0, 0%, 100%);
    --black: hsl(0, 0%, 0%);
    --jet: hsl(0, 0%, 20%);

    /**
    * gradient color
    */

    --gradient: linear-gradient( 90deg, var(--carolina-blue) 0%, var(--royal-blue-light) 100%);

    /**
    * typography
    */
    --ff-roboto: "Roboto", sans-serif;
    --ff-poppins: "Poppins", sans-serif;

    --fs-1: 4rem;
    --fs-2: 3.6rem;
    --fs-3: 3.2rem;
    --fs-4: 2.4rem;
    --fs-5: 2.2rem;
    --fs-6: 1.8rem;
    --fs-7: 1.6rem;

    --fw-800: 800;
    --fw-700: 700;
    --fw-600: 600;
    --fw-500: 500;

    /**
    * spacing
    */
    --section-padding: 120px;

    
    /**
    * shadow
    */

    --shadow-1: 4px 4px 15px var(--black_10);
    --shadow-2: 0 10px 15px var(--black_10);
    --shadow-3: 0px 20px 60px var(--black_8);
    --shadow-4: 0px 10px 30px var(--flickr-blue_30);
    --shadow-5: 0px 2px 60px 0px var(--black_10);

      /**
    * border radius
    */
    --radius-6: 6px;
    --radius-4: 4px;

       /**
    * transition
    */
    --transition: 0.25s ease;
    --cubic-out: cubic-bezier(0.33, 0.85, 0.4, 0.96);
}

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

li { list-style: none;}

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

a,
img,
span,
input,
button,
ion-icon { display: block;}

img { height: auto; }

input,
button {
    background: none;
    border: none;
    font: inherit;
}

input { width: 100%;}

button {cursor: pointer;}

ion-icon {pointer-events: none;}

address { font-style: normal;}

html {
    font-family: var(--ff-roboto);
    font-size: 10px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--white);
    color: var(--sonic-silver);
    font-size: 1.5rem;
}

/* REUSER STYLE */

.container {padding-inline: 25px; }

.section  { padding-block: var(--section-padding);}

.section-subtitle {
    color: var(--royal-blue-light);
    font-family: var(--ff-poppins);
    font-size: var(--fs-6);
    font-weight: var(--fw-700);
    text-transform: uppercase;
    margin-block-end: 10px;
}

.h1,
.h2,
.h3 {
    font-family: var(--ff-poppins);
    line-height: 1.2;
}

.h1 {
    color: var(--oxford-blue-1);
    font-size: var(--fs-2);
}

.h2,
.h3 { color: var(--oxford-blue-2);}

.h2 { font-size: var(--fs-1);}

.h3 { font-size: var(--fs-5);}

.btn {
    background-image: linear-gradient( var(--deg, 90deg), var(--carolina-blue) 0%, var(--royal-blue-light) 100%);
    color: var(--white);
    font-size: var(--fs-7);
    text-transform: uppercase;
    padding: 20px 30px;
    text-align: center;
    border-radius: var(--radius-4);
    box-shadow: var(--shadow-4);
  }

.btn:is(:hover, :focus) { --deg: -90deg; }

.w-100 { width: 100%; }

.text-center { text-align: center; }

.card-text,
.section-text { line-height: 1.7; }

.img-holder {
    aspect-ratio: var(--width) / var(--height);
    background-color: var(--light-gray);
}

.img-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}


/* -------------------Heder--------- */

.header-top,
.header-bottom .btn {display: none;}

.header-bottom{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding-block: 15px;
    z-index: 4;
}

.header-bottom.active {
    position: fixed;
    top: -81px;
    background-color: var(--white);
    box-shadow: var(--shadow-2);
    animation: slideIn 0.5s var(--cubic-out) forwards;
}

@keyframes slideIn {
    0%{transform: translateY(0);}
    100%{transform: translateY(100%);}

}

.header-bottom > .container{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.logo {
    color: var(--oxford-blue-1);
    font-family: var(--ff-poppins);
    font-size: 3.4rem;
    font-weight: var(--fw-800);
}
.nav-toggle-btn {
    color: var(--black);
    font-size: 30px;
    border: 1px solid var(--black);
    padding: 5px;
}

.nav-toggle-btn.active .menu-icon,
.nav-toggle-btn .close-icon {display: none;}

.nav-toggle-btn .menu-icon,
.nav-toggle-btn.active .close-icon {display: block;}

.navbar {
    position: absolute;
    top: calc(100% + 5px);
    left: 25px;
    right: 25px;
    background-color: var(--white);
    padding-inline: 0;
    box-shadow: var(--shadow-1);
    max-height: 0;
    visibility: hidden;
    overflow: hidden;
    transition: 0.25s var(--cubic-out);
}

.navbar.active {
    visibility: visible;
    max-height: 244px;
    transition-duration: 0.5s;
}

.navbar-list > li:not(:last-child) { border-block-end: 1px solid var(--gainsboro_50);}

.navbar-link {
    color: var(--jet);
    text-transform: uppercase;
    font-weight: var(--fw-600);
    padding: 15px;
}



/* HERO */

.hero {
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    padding-block-end: calc(var(--section-padding) / 2);
}

.hero-content { margin-block-end: 50px; }

.hero-title { margin-block: 15px 30px; }

.hero-text {
    font-size: var(--fs-6);
    line-height: 1.45;
    margin-block-end: 40px;
}

.hero-form {
    background-color: var(--white);
    max-width: 95%;
    padding: 15px;
    border-radius: var(--radius-4);
    box-shadow: var(--shadow-3);
}

.hero-form .email-field {
    background-color: var(--cultured);
    color: var(--black);
    min-height: 70px;
    padding-inline: 15px;
    border-radius: var(--radius-4);
    margin-block-end: 15px;
}

.hero-form .btn { width: 100%; }


/* ----------Service---------- */
.service-banner { display: none; }

.service { padding-block-end: 0; }

.service .section-title { margin-block-end: 50px; }

.service-list {
    display: grid;
    gap: 15px;
}

.service-card {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    min-height: 100%;
    border: 1px solid var(--light-gray);
    border-radius: var(--radius-4);
    padding: 30px;
}

.service-card .card-icon {
    width: 50px;
    flex-shrink: 0;
}

.service-card .card-title { margin-block-end: 8px; }

/* ---------About-------- */

.about { padding-block-end: 0; }

.about-banner { margin-block-end: 50px; }

.about .section-text-1 { margin-block: 25px 15px; }

.about .btn {
    font-size: unset;
    max-width: max-content;
    margin-block-start: 30px;
    padding-inline: 15px;
}

/* ---------Doctor----------- */

.doctor .section-title { margin-block-end: 50px; }

.doctor-card .card-banner {
    border-radius: var(--radius-4);
    overflow: hidden;
    margin-block-end: 25px;
}

.doctor-card {
    padding: 30px;
    border: 1px solid var(--light-gray);
    border-radius: var(--radius-4);
    text-align: center;
    min-height: 100%;
}

.doctor-card .card-title {
    font-size: var(--fs-4);
    transition: var(--transition);
}

.doctor-card:is(:hover, :focus-within) .card-title { color: var(--royal-blue-light); }

.doctor-card .card-subtitle {
    color: var(--royal-blue-light);
    margin-block: 10px 15px;
}

.doctor-card .card-social-list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.doctor-card .card-social-link {
    background-color: var(--lavender-web);
    color: var(--royal-blue-light);
    font-size: 16px;
    padding: 12px;
    border-radius: 50%;
    transition: var(--transition);
}

.doctor-card .card-social-link:is(:hover, :focus) {
    background-color: var(--royal-blue-light);
    color: var(--white);
}

.has-scrollbar {
    display: flex;
    gap: 30px;
    overflow-x: auto;
    margin-inline: 15px;
    padding-block-end: 40px;
    margin-block-end: -20px;
    scroll-snap-type: inline mandatory;
}

.scrollbar-item {
    min-width: 100%;
    scroll-snap-align: start;
}

.has-scrollbar::-webkit-scrollbar { height: 10px; }

.has-scrollbar::-webkit-scrollbar-track {
    background-color: var(--light-gray);
    border-radius: var(--radius-4);
}

.has-scrollbar::-webkit-scrollbar-thumb {
    background-color: var(--royal-blue-light);
    border-radius: var(--radius-4);
}

.has-scrollbar::-webkit-scrollbar-button { width: calc(25% - 30px); }

/* -----------Cta-------- */

.cta { background-color: var(--oxford-blue-1); }

.cta-banner { margin-block-end: 50px; }

.cta .section-subtitle { text-transform: capitalize; }

.cta .section-title {
    color: var(--white);
    font-size: var(--fs-3);
    margin-block-end: 30px;
}

.cta .btn { max-width: max-content; }

/* ----------Blog---------------- */

.blog .section-title { margin-block-end: 50px; }

.blog-list {
    display: grid;
    gap: 30px;
}

.blog-card {
    border-radius: var(--radius-4);
    box-shadow: var(--shadow-5);
}

.blog-card .card-banner {
    position: relative;
    border-radius: var(--radius-4);
    overflow: hidden;
}

.blog-card .card-banner img { transition: var(--transition); }

.blog-card:is(:hover, :focus-within) .card-banner img { transform: scale(1.1); }

.blog-card .card-badge {
    background-color: var(--royal-blue-light);
    color: var(--white);
    position: absolute;
    bottom: 25px;
    left: 25px;
    display: flex;
    gap: 5px;
    padding: 10px 15px;
    border-radius: var(--radius-6);
}

.blog-card .card content { padding: 30px; }

.blog-card .card-title { transition: var(--transition); }

.blog-card .card-title:is(:hover, :focus) { color: var(--royal-blue-light); }

.blog-card .card-text { margin-block: 15px; }

.blog-card .card-link {
    position: relative;
    color: var(--royal-blue-light);
    font-weight: var(--fw-500);
    text-transform: uppercase;
    width: max-content;
    transition: var(--transition);
}

.blog-card .card-link::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--royal-blue-light);
    transition: var(--transition);
}

.blog-card .card-link:is(:hover, :focus) { color: var(--oxford-blue-1); }

.blog-card .card-link:is(:hover, :focus)::after { background-color: var(--oxford-blue-1); }

/* ---------------Footer------------ */

.footer-top {
    background-color: var(--oxford-blue-2);
    color: var(--light-steel-blue);
}

.footer-top .container {
    display: grid;
    gap: 30px;
}

.footer-brand .logo { color: var(--white); }

.footer-text {
    line-height: 1.6;
    margin-block: 15px;
}

.schedule {
    display: flex;
    align-items: center;
    gap: 15px;
}

.schedule-icon,
.footer-item .item-icon {
    background-image: var(--gradient);
    color: var(--white);
    font-size: 18px;
    padding: 11px;
    border-radius: 50%;
}

.schedule .span,
.footer-item .item-text { line-height: 1.6; }

.footer-list-title {
    color: var(--white);
    font-family: var(--ff-poppins);
    font-size: var(--fs-4);
    font-weight: var(--fw-700);
    margin-block-end: 10px;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 5px;
    padding-block: 10px;
    transition: var(--transition);
}

.footer-link ion-icon {
    color: var(--royal-blue-light);
    --ionion-stroke-width: 50px;
}

.footer-link:is(:hover, :focus) { color: var(--white); }

.footer-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-item:not(:first-child) { margin-block-start: 20px; }

.footer-bottom {
    background-color: var(--oxford-blue-3);
    padding-block: 50px;
    text-align: center;
}

.copyright {
    color: var(--white);
    line-height: 1.6;
    margin-block-end: 25px;
}

.footer .social-list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
}

.footer .social-link {
    padding: 11px;
    background-color: hsla(0, 0%, 100%, 0.2);
    color: var(--white);
    font-size: 18px;
    border-radius: 50%;
}

.footer .social-link:is(:hover, :focus) { background-image: var(--gradient); }

/* ---------Back to top----- */

.back-top-btn {
    position: fixed;
    bottom: 10px;
    right: 20px;
    background-color: var(--royal-blue-light);
    font-size: 18px;
    color: var(--white);
    padding: 14px;
    border-radius: 50%;
    visibility: hidden;
    opacity: 0;
    transition: var(--transition);
}

.back-top-btn.active {
    transform: translateY(-10px);
    visibility: visible;
    opacity: 1;
}

/* ---------Media Queries------ */

/* responsive for larger than 575px screen */

@media (min-width: 575px) {
    /**
    * CUSTOM PROPERTY
    */

    :root {

        /**
        * typography
        */

        --fs-2: 4.2rem;
    }

    /**
    * REUSED STYLE
    */

    .container {
        max-width: 540px;
        width: 100%;
        margin-inline: auto;
    }

    /**
    * BLOG
    */

    .blog-card .h3 { --fs-5: 2.6rem; }

    /**
    * FOOTER
    */

    .footer-top .container { grid-template-columns: 1fr 1fr; }
}



/* responsive for larger than 768px screen */

@media (min-width: 768px) {
    /**
    * CUSTOM PROPERTY
    */

    :root {

        /**
        * typography
        */

        --fs-2: 4.8rem;
    }

    /**
    * RESET
    */

    body { font-size: 1.6rem; }


    /**
    * REUSED STYLE
    */

    .container { max-width: 750px; }

    .section-subtitle { --fs-6: 2.2rem; }



    /**
    * HERO
    */
    
    .hero { overflow: hidden; }

    .hero .container {
        display: grid;
        grid-template-columns: 1fr 0.75fr;
        align-items: center;
        gap: 20px;
    }

    .hero-content { margin-block-end: 0; }

    .hero-form { position: relative; }

    .hero-form .email-field {
        margin-block-end: 0;
        padding-inline-end: 190px;
    }

    .hero-form .btn {
        width: auto;
        position: absolute;
        top: 15px;
        right: 15px;
        bottom: 15px;
    }

    .hero-banner { margin-inline-end: -60px; }


    /**
    * SERVICE
    */
    .service-list{
    grid-template-columns: 1fr 1fr;
    column-gap: 30px;
    }

    /**
    * DOCTOR
    */

    .scrollbar-item { min-width: calc(50% - 15px); }

    /**
    * CTA
    */

    .cta { padding-block: 0; }

    .cta .container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: flex-end;
        gap: 60px;
    }

    .cta-banner { margin-block-end:  0; }

    .cta-content { padding-block: 60px; }



    /**
    * BLOG
    */

    .blog-list { grid-template-columns: 1fr 1fr; }

    /**
    * FOOTER
    */

    .footer-bottom { padding-block: 30px ; }

    .footer-bottom .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .copyright { margin-block: 0; }


    /**
    * BACK TO TOP
    */

    .back-top-btn {
        bottom: 70px;
        right: 50px;
    }
}

/* responsive for larger than 992px screen */

@media (min-width: 992px) {
    /**
    * CUSTOM PROPERTY
    */

    :root {

    /**
    * typography
    */

        --fs-2: 6rem;
        --fs-1: 4.6rem;
        --fs-3: 4.6rem;
    }

    /**
    * REUSED STYLE
    */

    .container { max-width: 980px; }

    /**
    * HEADER
    */


    .header-top {
        display: block;
        background-color: var(--oxford-blue-1);
        color: var(--white);
        padding-block: 20px;
    }

    .header-top :is(.container, .social-list),
    .contact-list,
    .contact-item {
        display: flex;
        align-items: center;
    }

    .header-top .container { justify-content: space-between; }

    .contact-list { gap: 20px; }

    .contact-item { gap: 5px; }

    .contact-item ion-icon {
        color: var(--royal-blue-light);
        --ionicon-stroke-width: 40px;
    }

    .contact-link { font-size: 1.5rem; }

    .header-top .social-list { gap: 15px; }

    .header-top .social-link {
        font-size: var(--fs-6);
        transition: var(--transition);
    }

    .header-top .social-link:is(:hover, :focus) { color: var(--royal-blue-light); }

    .header-bottom {
        top: 58px;
        padding-block: 20px;
    }

    .header-bottom.active { top: -95px; }

    .nav-toggle-btn { display: none; }

    .navbar,
    .navbar.active {
        all: unset;
        margin-inline-start: auto;
    }

    .navbar-list {
        display: flex;
        align-items: center;
    }

    .navbar-list > li:not(:last-child) { border-block-end: none; }

    .navbar-link {
        color: var(--oxford-blue-1);
        font-family: var(--ff-poppins);
        text-transform: capitalize;
        transition: var(--transition);
    }

    .navbar-link:is(:hover, :focus) { color: var(--royal-blue-light); }

    .header-bottom .btn {
        display: block;
        padding: 15px 20px;
    }


    /**
    * SERVICE
    */

    .service-list { grid-template-columns: repeat(3, 1fr); }

    .service-banner {
        display: block;
        grid-column: 2 / 3;
        grid-row: 1 / 4;
        align-self: center;
    }

    /**
    * ABOUT
    */

    .about .container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: center;
        gap: 30px;
    }

    .about-banner { margin-block-end: 0; }

    /**
    * DOCTOR
    */

    .scrollbar-item { min-width: calc(33.33% - 20px); }


    /**
    * CTA
    */

    .cta-content { padding-block: 80px; }


    /**
    * BLOG
    */

    .blog-list { grid-template-columns: repeat(3, 1fr); }


    /**
    * FOOTER
    */

    .footer-top .container { grid-template-columns: 1fr 0.5fr 0.6fr 0.75fr; }


}


/* responsive for larger than 1200px screen */

@media (min-width: 1200px) {

    /**
    * CUSTOM PROPERTY
    */

    :root {

        /**
        * typography
        */
    
            --fs-2: 8rem;
            --fs-1: 5.5rem;
            --fs-3: 4.8rem;
        }

        /**
        * REUSED STYLE
        */

        .container { max-width: 1180px; }


        /**
        * HEADER
        */

        .contact-list { gap: 30px; }

        .header-bottom .btn { padding: 18px 30px; }

        .header-bottom > .container { gap: 40px; }

        .navbar-list { gap: 15px; }

        /**
        * ABOUT
        */

        .about .container {
            grid-template-columns: 0.85fr 1fr;
            gap: 100px;
        }


        /**
        * DOCTOR
        */

        .doctor { padding-block-end: 180px; }

        .scrollbar-item { min-width: calc(25% - 22.5px); }

        .has-scrollbar {
            padding-block-end: 0;
            margin-block-end: 0;
        }


        /**
        * CTA
        */

        .cta .container { align-items: center; }

        .cta-banner { margin-block-start: -120px; }
    }