:root {
    /* Utilities */
    --margin: 0.5rem;
    --font-size-default: 1.25rem;
    --font-size-small: 1rem;
    --font-size-smaller: 0.875rem;

    --font-weight-normal: 400;
    --font-weight-bold: 500;
    --font-weight-bolder: 600;
    --font-weight-boldest: 700;

    --background-color: white;

    --alternate-bg-color: rgb(248, 249, 250);
    --alternate-color: black;

    --text-main: black;
    --text-secondary: #444;

    --primary-color: #0056b3;
    --primary-hover-color: #004085;

    /* Components */
    --nav-bg-color: black;
    --nav-color: white;
    --nav-links-gap: calc(var(--margin) * 2);

    --tag-bg-color: #e7f3ff;
    --tag-color: #003d99;

    --card-min-width: 300px;
    --card-bg-color: white;
    --card-shadow: rgba(0, 0, 0, 0.1);
    --card-shadow-hover: rgba(0, 0, 0, 0.15);
}

@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #0d0d0d;

        --alternate-bg-color: #1a1a1a;
        --alternate-color: #e0e0e0;

        --text-main: #e0e0e0;
        --text-secondary: #b5b5b5;

        --primary-color: #8db9ec;
        --primary-hover-color: #6db0ff;

        /* Components */
        --tag-bg-color: #1a3a5a;
        --tag-color: #a6ccf9;

        --card-bg-color: #2a2a2a;
        --card-shadow: rgba(0, 0, 0, 0.3);
        --card-shadow-hover: rgba(0, 0, 0, 0.5);
    }
}

@media (max-width: 360px) {
    :root {
        --nav-links-gap: var(--margin);
        --card-min-width: 100%;
    }
}

/* General purpose */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family:
        system-ui,
        -apple-system,
        "Segoe UI",
        Roboto,
        "Helvetica Neue",
        Arial,
        "Noto Sans",
        "Liberation Sans",
        sans-serif,
        "Apple Color Emoji",
        "Segoe UI Emoji",
        "Segoe UI Symbol",
        "Noto Color Emoji";
    font-size: var(--font-size-default);
    line-height: 1.5;
    margin: 0;
    color: var(--text-main);
    background-color: var(--background-color);
}

h1,
h2,
h3,
p {
    margin: 0;
    margin-block-end: 1rem;
}

h1 {
    font-size: 3rem;
    font-weight: var(--font-weight-boldest);
}
h2 {
    font-weight: var(--font-weight-bolder);
}
h3 {
    font-weight: var(--font-weight-bold);
}
p {
    font-weight: var(--font-weight-normal);
}

a {
    text-decoration: none;
    color: var(--primary-color);
}

a:hover {
    color: var(--primary-hover-color);
}

/* stylelint-disable-next-line plugin/no-unsupported-browser-features */
a:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

section {
    padding-block: calc(var(--margin) * 6);
}

.container {
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: calc(var(--margin) * 2);
}

.bg-alternate {
    background-color: var(--alternate-bg-color);
    color: var(--alternate-color);
}

.no-list-style {
    list-style-type: none;
    padding: 0;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--nav-bg-color);
    color: var(--nav-color);
    text-decoration: none;
}

/* stylelint-disable-next-line plugin/no-unsupported-browser-features */
.skip-link:focus-visible {
    top: 0;
}
/* End General purpose */

/* Navbar */
nav {
    background-color: var(--nav-bg-color);
    color: var(--nav-color);
    padding-block: calc(var(--margin) * 2);
}

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

.nav-container a {
    text-decoration: none;
    color: white;
}

.nav-links {
    display: flex;
    gap: var(--nav-links-gap);
}

.nav-link {
    color: var(--nav-color);
    opacity: 0.7;
    transition: opacity 0.2s ease-in-out;
}

/* stylelint-disable-next-line plugin/no-unsupported-browser-features */
.nav-link:hover,
.nav-link:focus-visible,
.nav-link.active {
    opacity: 1;
}

.nav-link.active {
    font-weight: var(--font-weight-bolder);
}
/* End Navbar */

/* Intro */
.banner {
    display: flex;
    gap: calc(var(--margin) * 4);
    flex-wrap: wrap;
}

.profile {
    max-width: min(100%, 200px);
    aspect-ratio: 1 / 1;
    border-radius: 50%;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}
/* End Intro */

/* About section */
.about-items {
    display: flex;
    flex-direction: column;
    gap: calc(var(--margin) * 4);
}

.download-button {
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: 5px;
    padding: 0.5rem 1rem;
    margin-inline: auto;
    transition-duration: 0.2s;
}

/* stylelint-disable-next-line plugin/no-unsupported-browser-features */
.download-button:hover,
.download-button:focus-visible {
    background-color: var(--primary-color);
    color: var(--background-color);
}
/* End About section */

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(var(--card-min-width), 1fr));
    gap: calc(var(--margin) * 3);
    margin-block-start: calc(var(--margin) * 3);
}

.project-card {
    background: var(--card-bg-color);
    padding: calc(var(--margin) * 3);
    border-radius: 8px;
    box-shadow: 0 0.25rem 0.5rem var(--card-shadow);
    transition:
        transform 0.2s ease-in-out,
        box-shadow 0.2s ease-in-out;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 0.5rem 1rem var(--card-shadow-hover);
}

.project-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-small);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--margin);
    margin-block: calc(var(--margin) * 2);
}

.tag {
    background-color: var(--tag-bg-color);
    color: var(--tag-color);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: var(--font-size-smaller);
    font-weight: var(--font-weight-bold);
}

.project-links {
    display: flex;
    gap: calc(var(--margin) * 2);
    margin-block-start: calc(var(--margin) * 2);
}

.project-links a {
    font-weight: var(--font-weight-bold);
}

/* End Projects Section */

/* Contact Section */
.contact-links {
    display: flex;
    gap: calc(var(--margin) * 4);
    flex-wrap: wrap;
    justify-content: center;
}

.contact-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--margin);
    padding: calc(var(--margin) * 2);
    border-radius: 8px;
    transition:
        background-color 0.2s ease-in-out,
        transform 0.2s ease-in-out;
}

.contact-link:hover {
    background-color: var(--alternate-bg-color);
    transform: translateY(-4px);
}

.contact-link span {
    color: var(--text-main);
    font-weight: var(--font-weight-bold);
}
/* End Contact Section */

/* Photo Gallery */
.photo-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(var(--card-min-width), 1fr));
    gap: calc(var(--margin) * 2);
}

.photo-item {
    /* stylelint-disable-next-line plugin/no-unsupported-browser-features */
    overflow: hidden;
    border-radius: 4px;
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease-in-out;
    height: 300px;
}

.photo-item:hover {
    transform: scale(1.05);
}

.photo-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    cursor: pointer;
}
/* End Photo Gallery */

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    border: none;
    background: none;
    color: white;
    font-size: 40px;
    font-weight: var(--font-weight-boldest);
    cursor: pointer;
    transition: color 0.3s;
}

.lightbox-close:hover {
    color: #bbb;
}
/* End Lightbox */