:root {
    --body-color: #707172;
    --sidebar-color: rgba(0, 0, 0, 0.3);
    --window-color: rgba(255, 255, 255, 0.3);
    --section-main-color: #fff;
    --title-font-color: #069;
    --main-text-color: #707172;
    --secondary-text-color: #d4d4d4;
    --intro-text-color: #333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

@keyframes flicker {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
    100% {
        opacity: 1;
    }
}

html {
    scroll-behavior: smooth;
    font-size: 18px;
}

body {
    background-color: var(--body-color);
}

.toggle-sidebar {
    border-radius: 0 10px 10px 0;
    padding: 2vh;
    position: fixed;
    top: 7vh;
    left: 0vw;
    cursor: pointer;
    z-index: 100;
    background-color: var(--sidebar-color);
    cursor: pointer;
    display: none;
    transition: left 0.3s ease;
}

.sidebar {
    width: 30vw;
    height: 100vh;
    background-color: var(--sidebar-color);
    position: fixed;
    z-index: 100;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: left 0.3s ease;
}

.sidebar .logo {
    width: 50%;
    min-height: 20vh;
    border: 1px solid white;
    font-size: 2.6rem;
    text-transform: uppercase;
    color: white;
    text-align: center;
    padding: 5vh 0;
    margin: auto;
    margin-top: 8vh;
    position: relative;
}

.sidebar .logo-border {
    position: absolute;
    width: 15vw;
    height: 100%;
    left: 10px;
    top: 10px;
    border: 1px solid white;
}

.sidebar nav {
    height: 50%;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.sidebar nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    width: 55%;
}

.sidebar nav ul li a {
    display: block;
    height: 5vh;
    color: white;
    text-decoration: none;
    text-align: right;
    text-transform: uppercase;
    font-size: 1.25rem;
    position: relative;
}

.sidebar nav ul li a:hover {
    animation: flicker 0.5s ease-in-out infinite alternate;
}

.sidebar nav ul li a:hover::after {
    content: "";
    width: 15px;
    height: 15px;
    background-color: white;
    animation: flicker 0.5s ease-in-out infinite alternate;
    position: absolute;
    right: -30px;
}

.sidebar .social {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 1rem;
    padding: 10px;
}

.sidebar .social a {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: white;
    padding: 5px;
    width: 40px;
    height: 40px;
    text-align: center;
    border-radius: 5px;
    color: black;
    text-decoration: none;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.sidebar .social a:hover {
    background-color: var(--title-font-color);
    color: white;
}

.sidebar .copyright {
    color: white;
    text-align: center;
    padding: 1vh;
    font-size: 0.9rem;
    text-transform: capitalize;
}

.sidebar .copyright a {
    color: white;
}

#intro {
    width: 100%;
    min-height: 100vh;
    padding-left: 30vw;
    position: relative;
    background-image: url('../images/intro-bg.jpg');
    background-size: 100% 100%;
    background-attachment: fixed;
    display: flex;
    flex-direction: row;
    justify-content: end;
    padding: 25vh 4vw;
}

#intro .brief {
    width: 35%;
    height: 45%;
    min-height: 50%;
    border: 1px solid white;
    padding: 3.5vw;
    background-color: var(--window-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

#intro .brief .content {
    line-height: 2.5rem;
    color: var(--intro-text-color);
}

.title {
    font-size: 1.6rem;
    color: var(--title-font-color);
    text-transform: capitalize;
    padding-bottom: 5vh;
}

#intro .brief .title {
    text-transform: uppercase;
}

.container {
    position: absolute;
    left: 30vw;
    background-color: var(--section-main-color);
}

#about {
    min-height: 100vh;
    padding: 5vh;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}

#about section {
    width: 50%;
    height: 100%;
    padding: 8vh;
}

#about section .icon {
    font-size: 7rem;
}

#about section .description .content{
    line-height: 2rem;
    padding-bottom: 3vh;
    color: var(--main-text-color);
}

#work {
    min-height: 80vh;
    padding: 7vh 3vw;
}

.work-content {
    border: 1px solid var(--secondary-text-color);
    padding: 5vh 10vh;
    position: relative;
}

.work-border {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 10px;
    top: 10px;
    border: 1px solid var(--secondary-text-color);
}

.work-content .title {
    position: relative;
    z-index: 10;
}

#work .slider {
    width: 50vw;
    overflow-x: hidden;
    white-space: nowrap;
    position: relative;
    z-index: 10;
}

#work .slider .pics {
    display: flex;
    gap: 1rem;
    transition: transform 0.5s ease;
}

.img {
    position: relative;
    cursor: pointer;
}

.img-info {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 10;
    width: 100%;
    height: 100%;
    padding: 20px;
    outline: 0;
    outline-offset: -10px;
    text-wrap: wrap;
    display: flex;
    visibility: hidden;
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
    text-align: center;
    transition: outline 0.5s ease, background-color 0.5s ease;
}

.img-info .title {
    color: white;
    text-transform: uppercase;
    font-size: 1.2rem;
    font-weight: bold;
}

.img-info .content {
    color: white;
    text-transform: uppercase;
    line-height: 1.5rem;
}

#work .slider .pics .img:hover .img-info {
    visibility: visible;
    outline: 1px solid white;
    background-color: rgba(0, 102, 153, 0.5);
}

#work .slider nav{
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    padding: 1vh;
}

#work .slider button {
    width: 15px;
    height: 15px;
    background-color: var(--secondary-text-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

#work .slider button:hover {
    background-color: var(--body-color);
}

#clients {
    min-height: 80vh;
    padding: 5vh 6vw;
}

#clients .content {
    color: var(--main-text-color);
    line-height: 2.5rem;
}

.clients-logos {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    flex-grow: 1rem;
    justify-content: space-between;
    padding: 3vh 0;
}

.clients-logos a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    border-radius: 5px;
    padding: 1vh;
    border: 1px solid var(--secondary-text-color);
}

#talk {
    min-height: 80vh;
    padding: 5vh 3vw;
    display: flex;
    flex-direction: row;
    gap: 2vw;
}

#talk .description, #talk form {
    width: 50%;
    min-height: 50vh;
    padding: 6vh;
    border: 1px solid var(--secondary-text-color);
    position: relative;
}

#talk .description .content {
    line-height: 2rem;
    padding-bottom: 3vh;
    color: var(--main-text-color);
}

#talk .description-border {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 10px;
    top: 10px;
    border: 1px solid var(--secondary-text-color);
}

#talk form {
    border: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 0 5vw;
}

#talk form input, #talk form textarea {
    text-transform: capitalize;
    font-size: 1rem;
    padding: 1vh;
    border: none;
    border-bottom: 1px solid var(--secondary-text-color);
}

#talk form textarea {
    resize: vertical;
    height: 20vh;
}

#talk form input:focus, #talk form textarea:focus {
    outline: none;
    border-bottom: 1px solid var(--title-font-color);
}

#talk .send {
    display: flex;
    justify-content: end;
}

#talk .send button {
    border: none;
    background-color: white;
    color: var(--main-text-color);
    text-transform: uppercase;
    font-size: 1rem;
    padding: 1.5vh;
    cursor: pointer;
    border-bottom: 1px solid var(--secondary-text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

#talk .send button:hover {
    background-color: #a0a0a1;
    color: white;
}

@media (max-width: 991px) {
    html {
        font-size: 14px;
    }
    .toggle-sidebar {
        display: block;
    }
    .sidebar {
        left: -30vw;
    }
    .sidebar .logo {
        font-size: 1.5rem;
    }

    #intro {
        padding-left: 0;
    }

    #intro .brief {
        width: 50%;
    }

    .container {
        left: 0;
    }

    #about {
        flex-direction: column;
        align-items: center;
    }   

    #about section {
        width: 100%;
    }
    
}

@media (max-width: 678) {
    html {
        font-size: 11px;
    }
}