/* Global Styles */
* {
    --primary-color: black;
    --secondary-color: white;
    --accent-color: #0B378D;
}

html {
    margin: 0;
    padding: 0;
    height: 100%;
    color: var(--secondary-color);
    font-family: "Funnel Sans", sans-serif;
    background-color: var(--primary-color);
}

body {
    margin: 0;
    padding: 0;
    height: 100%;
}

header {
    --margin-size: 5px;
    --padding-size: 1%;

    position: fixed;
    top: 0;
    left: 0;

    width: calc(100% - (var(--margin-size) * 2 + var(--padding-size) * 2));
    height: 2vh;
    min-height: 40px;
    z-index: 10;

    background-color: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border-radius: 1vh;

    margin: var(--margin-size);
    padding: var(--padding-size);

    display: flex;
    align-items: center;
    justify-content: left;

    transition-duration: 0.5s;

    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

header:hover {
    background-color: rgba(0, 0, 0, 0.75);
    transition-duration: 0.5s;
}

header p {
    color: var(--primary-color);
    padding: 10px;
}

/* Logo */
.logo {
    height: 2rem;
    filter: invert(1);
}

.logo-link {
    display: flex;
    align-items: center;
}

.options {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: right;
}

.options a {
    color: var(--primary-color);
    margin: 0 10px;
    font-size: 1.2rem;
    text-decoration: none;
}

.options a:hover {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-decoration-color: var(--accent-color);
    text-decoration-skip-ink: all;
}

/* Copyright Bar */
.footer {
    width: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    color: var(--secondary-color);
    text-align: center;

    padding: 0;
    padding-top: 5rem;
    padding-bottom: 1rem;

    z-index: 5;
}

.footer p {
    font-size: small;

    margin: 0;
    padding: 0;
}

.footer a {
    color: var(--secondary-color);
    text-decoration: none;
}

.footer img {
    vertical-align: middle;
    
    width: 7.5rem;
    height: auto;
    margin: 10px 0;
}

.footer .social-icon {
    width: 2rem;
    height: 2rem;
    margin-left: 10px;

    filter: invert(1);
}

/* Mailbox Icon */
.mailbox {
    z-index: 10;
}

.mailbox a {
    display: flex;
    align-items: center;
    justify-content: center;

    width: 2rem;
    height: 2rem;
    padding: 5px 25px;

    border-radius: 5%;

    text-decoration: none;
    transition: background-color 0.3s ease;
}

.mailbox a:hover {
    background-color: var(--secondary-color);
}

.mailbox svg {
    width: 100%;
    height: 100%;
    fill: var(--secondary-color);
    transition: fill 0.3s ease;
}

.mailbox a:hover svg {
    fill: var(--accent-color);
}

/* Blinking Animation */
@keyframes blink {
    0% {
        opacity: 1;
    }

    /* Fully visible */
    100% {
        opacity: 0.3;
    }

    /* Fades out */
}

/* Mobile Responsiveness */
@media (max-width: 600px) {
    .logo {
        margin: 0 5px;
    }

    .options a {
        font-size: 1rem;
        margin: 0 5px;
    }
}

@media (max-width: 400px) {
    .options a {
        font-size: 0.9rem;
        margin: 0 3px;
    }
}

@media (orientation: landscape) {
    /* Styles for landscape (horizontal) mode */
}

@media (orientation: portrait) {
    /* Styles for portrait (vertical) mode */
}