/* Menu */

.menu_overlay {
    top: -100%;
    opacity: 0;
    position: fixed;
    height: 100%;
    width: 100%;
    background: linear-gradient(-145deg, rgba(2, 10, 20, 1), rgba(2, 21, 45, 1));
    z-index: 50;
    text-align: center;
}

.menu_overlay.fadeOut {
    animation: menuOverlayFadeOut 1s ease-in-out;
    animation-fill-mode: both;
}

.menu_overlay.active {
    display: block;
    animation: menuOverlayFadeIn 0.75s ease-in-out;
    animation-fill-mode: both;
}

.menu_overlay .content {
    text-align: center;
    position: absolute;
    top: 25%;
}

.menu_overlay .option {
    user-select: none;
    cursor: pointer;
}

.menu_overlay .contact {
    left: 5%;
    width: 90%;
    text-align: right;
    position: absolute;
    bottom: 5%;
}

@keyframes menuOverlayFadeIn {
    0% {
        top: -100%;
        opacity: 0;
        background: linear-gradient(-145deg, rgba(2, 10, 20, 0), rgba(2, 21, 45, 0));
    }
    50% {
        background: linear-gradient(-145deg, rgba(2, 10, 20, 0.5), rgba(2, 21, 45, 0.5));
    }
    100% {
        top: 0;
        opacity: 1;
        background: linear-gradient(-145deg, rgba(2, 10, 20, 1), rgba(2, 21, 45, 1));
    }
}

@keyframes menuOverlayFadeOut {
    0% {
        top: 0;
        opacity: 1;
        background: linear-gradient(-145deg, rgba(2, 10, 20, 1), rgba(2, 21, 45, 1));
    }
    50% {
        background: linear-gradient(-145deg, rgba(2, 10, 20, 0.5), rgba(2, 21, 45, 0.5));
    }
    100% {
        top: -100%;
        opacity: 0;
        background: linear-gradient(-145deg, rgba(2, 10, 20, 0), rgba(2, 21, 45, 0));
    }
}

/* Header */

header {
    position: fixed;
    height: 100px;
    width: 100%;
    text-align: left;
    user-select: none;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0));
    z-index: 55;
    transition: all 1s ease-in-out;
}

header.backgroundNone {
    transition: all 1s ease-in-out;
    background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0), rgba(0, 0, 0, 0));
}

header .element {
    top: 0;
    width: 25%;
    height: 100%;
    display: inline-block;
    position: absolute;
    margin: calc(calc(150px / 2) - calc(100px / 2)) 0 0 0;
}

header .left {
    left: 5%;
    text-align: left;
}

header .right {
    right: 5%;
    text-align: right;
    margin: calc(calc(175px / 2) - calc(100px / 2)) 0 0 0;
}

header .center {
    left: calc(50% - calc(50% / 2));
    width: 50%;
    text-align: center;
}

header img.logo {
    filter: drop-shadow(4px 4px 10px black);
    margin-left: 5%;
    display: inline-block;
    height: 100px;
    width: 100px;

    animation: fadeIn 1s ease-in-out;
    animation-fill-mode: both;
}

header .menu_toggle {
    margin-right: 5%;
    display: inline-block;
    max-height: 100%;
    transition: all 0.25s ease-in-out;
    cursor: pointer;

    animation: fadeIn 1s ease-in-out;
    animation-fill-mode: both;
    filter: drop-shadow(4px 4px 10px black);
}

header .menu_toggle.open {
    display: inline-block;
}

header .menu_toggle.close {
    display: none;
}

header .menu_toggle:hover {
    transition: all 0.1s ease-in-out;
    transform: scale(1.1);
}

/* Footer */

footer {
    display: block;
    position: absolute;
    width: 100%;
    bottom: 0;
}

footer .contact {
    display: inline-block;
    position: relative;
    width: 100%;
}

/* General */

.m_center {
    margin: 0 auto;
}

.t_left {
    text-align: left;
}

.t_center {
    text-align: center;
}

.t_right {
    text-align: right;
}

/* Letter Spacing */

.ls_primary {
    letter-spacing: 2.5px;
}

.ls_secondary {
    letter-spacing: 3.5px;
}

.ls_thirdary {
    letter-spacing: 5px;
}

/* Colors */

.c_primary {
    color: white;
}

.c_secondary {
    color: rgb(175, 175, 175);
}

.c_thirdary {
    color: rgb(135, 135, 135);
}

/* Alpha */

.a_primary {
    opacity: 0.75;
}

.a_secondary {
    opacity: 0.5;
}

.a_thirdary {
    opacity: 0.25;
}

/* Font-Sizes */

.fs_big {
    font-size: 75px;
}

.fs_primary {
    font-size: 25px;
}

.fs_secondary {
    font-size: 20px;
}

.fs_thirdary {
    font-size: 15px;
}

.fs_small {
    font-size: 10px;
}

/* Keyframes */

@keyframes fadeIn {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

@keyframes fadeOut {
    0% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}