/********** FONT IMPORT **********/
@font-face {
    font-family: "Roboto Thin";
    src: url(./resources/fonts/roboto_thin.ttf);
}

@font-face {
    font-family: "Roboto Regular";
    src: url(./resources/fonts/roboto_regular.ttf);
}

@font-face {
    font-family: "Roboto Black";
    src: url(./resources/fonts/roboto_black.ttf);
}

/********** VARIABLES **********/
:root {
    --main-color: rgb(62.5, 125, 250);
    --subline-color: rgb(50, 100, 200);
    --background-color: rgb(250, 250, 250);
}

/********** RESET CSS **********/
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    text-decoration: none;
    list-style: none;
    scroll-behavior: smooth;
}

/********** SCROLLBAR **********/
::-webkit-scrollbar {
    width: 12.5px;
}

::-webkit-scrollbar-thumb {
    border-radius: 25px;
    background-color: var(--main-color);
}

/********** GENERAL **********/
body {
    font-family: "Roboto Regular", sans-serif;
    font-size: 1rem;
    background-color: var(--background-color);
}

a {
    color: var(--main-color);
}

h1 {
    font-family: "Roboto Black", sans-serif;
    text-transform: uppercase;
}

h2 {
    display: none;
}

h3 {
    font-family: "Roboto Thin", sans-serif;
    font-size: 2rem;
    color: var(--main-color);
}

h4 {
    font-family: "Roboto Black", sans-serif;
    font-size: 1.5rem;
    color: var(--main-color);
}

/* General responsive */
@media (max-width: 768px) {
    h3 {
        font-size: 1.5rem;
    }
}

/********** HEADER **********/
header {
    position: fixed;
    width: 100%;
    height: 75px;
    padding: 0 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(2.5px);
    background-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 2.5px 5px 0 rgba(0, 0, 0, 0.25),
                0 -2.5px 0 0 var(--background-color) inset;
    z-index: 9999;
}

nav {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 25px;
    transition: 0.25s ease;
}

nav ul {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 25px;
}

nav ul a {
    text-transform: uppercase;
}

nav ul a:hover {
    text-decoration: underline;
}

nav button {
    padding: 12.5px 25px;
    text-transform: uppercase;
    color: rgb(255, 255, 255);
    border: none;
    border-radius: 2.5px;
    background-color: var(--main-color);
    cursor: pointer;
    transition: 0.25s ease;
}

nav button:hover {
    background-color: var(--subline-color);
}

nav button:active {
    transform: scale(0.95);
}

/* Hamburger icon */
#hamburger_icon {
    position: relative;
    width: 25px;
    height: 25px;
    display: none;
    cursor: pointer;
}

.bar {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 2px;
    border-radius: 2.5px;
    background-color: var(--main-color);
    transform: translate(-50%, -50%);
}

#hamburger_icon .bar:nth-last-child(1) {
    top: 25%;
}

#hamburger_icon .bar:nth-last-child(3) {
    top: 75%;
}

/* Hamburger icon animation */
#hamburger_icon.active .bar:nth-last-child(1) {
    top: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
}

#hamburger_icon.active .bar:nth-last-child(2) {
    opacity: 0;
}

#hamburger_icon.active .bar:nth-last-child(3) {
    top: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
}

/* Header responsive */
@media (max-width: 768px) {
    header {
        background-color: white;
    }

    nav {
        position: fixed;
        top: 75px;
        right: -125%;
        width: 100%;
        padding: 25px 0;
        border-bottom: 5px solid var(--main-color);
        background-color: rgba(255, 255, 255);
    }

    nav.active {
        right: 0px;
    }

    nav ul {
        flex-direction: column;
    }

    nav button {
        display: none;
    }

    #hamburger_icon {
        display: block;
    }
}

/********** ABOUT SECTION **********/
#about {
    width: 100%;
    height: 100vh;
    padding-top: 100px;
    padding-bottom: 25px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    gap: 25px;
    text-align: center;
}

#gallery {
    width: 70%;
    margin-top: 25px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#main_image_container {
    width: 75%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#main_image {
    width: 100%;
    border-radius: 2.5px;
    box-shadow: 0 0 5px 0 rgba(0, 0, 0, 0.25);
}

#thumbnails {
    width: 25%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

.thumbnail {
    width: 70%;
    border-radius: 2.5px;
    cursor: pointer;
    transition: 0.25s ease;
    box-shadow: 0 0 5px 0 rgba(0, 0, 0, 0.25);
}

.thumbnail:active {
    transform: scale(0.95);
}

/* About section responsive */
@media (max-width: 768px) {
    #about {
        height: 100%;
        padding-top: 115px;
    }

    #gallery {
        width: 95%;
        flex-direction: column;
        gap: 25px;
    }

    #main_image_container {
        width: 100%;
    }

    #thumbnails {
        width: 100%;
        height: auto;
        flex-direction: row;
    }

    .thumbnail {
        width: calc(100% / 5)
    }
}

/********** FEATURES SECTION **********/
#features {
    height: 100%;
    padding: 100px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 100px;
    background-color: white;
}

.feature {
    width: 75%;
    display: flex;
    flex-direction: row;
    align-items: center;
}

.feature img {
    width: 35%;
}

.feature_description {
    width: 65%;
    padding: 25px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 12.5px;
    text-align: center;
}

.reverse {
    flex-direction: row-reverse;
}

#description {
    width: 75%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 12.5px;
    text-align: center;
}

/* Features section responsive */
@media (max-width: 768px) {
    #features {
        padding: 100px 0;
        gap: 100px;
    }

    .feature {
        width: 95%;
        gap: 25px;
        flex-direction: column-reverse;
    }

    .feature img {
        width: 100%;
    }

    .feature_text {
        width: 100%;
        padding: 0;
    }
}

/********** FOOTER **********/
footer {
    height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 25px;
    background-color: var(--background-color);
}

footer ul {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 12.5px;
}

.social_icon {
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background-color: var(--main-color);
    cursor: pointer;
    transition: 0.25s ease;
}

.social_icon:hover {
    background-color: var(--subline-color);
}

.social_icon:active {
    transform: scale(0.95);
}

.social_icon img {
    width: 50px;
    height: 50px;
}

#copyright {
    text-transform: uppercase;
}

/********** MOVE TO TOP BUTTON **********/
#move_to_top_button {
    position: fixed;
    right: 25px;
    bottom: -50px;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background-color: var(--main-color);
    cursor: pointer;
    transition: 0.25s ease;
}

#move_to_top_button:hover {
    background-color: var(--subline-color);
}

#move_to_top_button:active {
    transform: scale(0.95);
}

#move_to_top_button img {
    width: 25px;
}

/* Move to top button responsive */
@media (max-width: 768px) {
    #move_to_top_button {
        display: none;
    }
}

/********** GLOBAL PAGE ANIMATION **********/
.hidden {
    opacity: 0;
    transition: all 0.5s;
}

.show {
    opacity: 1;
}

.hidden_top {
    opacity: 0;
    transform: translateY(-25%);
    transition: all 0.5s;
}

.show_top {
    opacity: 1;
    transform: translateY(0);
}

.hidden_right {
    opacity: 0;
    transform: translateX(25%);
    transition: all 0.5s;
}

.show_right {
    opacity: 1;
    transform: translateX(0);
}

.hidden_bottom {
    opacity: 0;
    transform: translateY(25%);
    transition: all 0.5s;
}

.show_bottom {
    opacity: 1;
    transform: translateY(0);
}

.hidden_left {
    opacity: 0;
    transform: translateX(-25%);
    transition: all 0.5s;
}

.show_left {
    opacity: 1;
    transform: translateX(0);
}

@media(prefers-reduced-motion) {
    .hidden {
        transition: none;
    }

    .hidden_top {
        transition: none;
    }

    .hidden_right {
        transition: none;
    }

    .hidden_bottom {
        transition: none;
    }

    .hidden_left {
        transition: none;
    }
}

/* Global page animation Responsive */
@media (max-width: 768px) {
    .hidden_top {
        opacity: 1;
        transform: translateY(0%);
        transition: none;
    }

    .hidden_right {
        opacity: 1;
        transform: translateX(0%);
        transition: none;
    }

    .hidden_bottom {
        opacity: 1;
        transform: translateY(0%);
        transition: none;
    }

    .hidden_left {
        opacity: 1;
        transform: translateX(0%);
        transition: none;
    }
}