:root {
    --color-background: #050505;
    --color-surface: #0b1220;
    --color-header-background: rgba(5, 5, 5, 0.95);
    --color-text: #f8fafc;
    --color-text-muted: #cbd5e1;
    --color-accent: #facc15;
    --color-accent-dark: #ca8a04;
    --color-accent-text: #050505;
    --color-border: #1e3a5f;
    --color-error: #fca5a5;

    --font-main: Arial, Helvetica, sans-serif;

    --section-padding: 4rem 1.5rem;
    --content-width: 1100px;
    --border-radius: 1rem;
    --header-height: 5rem;
}


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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-main);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
}

h1,
h2 {
    margin: 0;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.2rem, 6vw, 4rem);
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
}

h3 {
    margin: 0;
}


.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-header-background);
    border-bottom: 1px solid var(--color-border);
}

.navbar {
    min-height: var(--header-height);
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.navbar__logo {
    font-weight: 700;
    text-decoration: none;
    color: var(--color-accent);
}

.navbar__toggle {
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    color: var(--color-text);
    font-size: 1.5rem;
    padding: 0.35rem 0.7rem;
    border-radius: 0.5rem;
    cursor: pointer;
}

.navbar__menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    list-style: none;
    margin: 0;
    padding: 1rem 1.5rem;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.navbar__menu--open {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.navbar__link {
    display: block;
    padding: 0.5rem 0;
    text-decoration: none;
    color: var(--color-text-muted);
    font-weight: 600;
}

.navbar__link:hover,
.navbar__link:focus {
    color: var(--color-accent);
}

.section {
    scroll-margin-top: calc(var(--header-height));
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--section-padding);
}

.hero {
    display: grid;
    gap: 2rem;
    align-items: center;
    min-height: calc(100svh - var(--header-height));
}

.hero__eyebrow,
.section__eyebrow {
    margin: 0 0 0.5rem;
    color: var(--color-accent);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
}

.hero__description,
.section__description {
    color: var(--color-text-muted);
    max-width: 70ch;
}

.hero__actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem;
    border-radius: 999px;
    background-color: var(--color-accent);
    color: var(--color-accent-text);
    font-weight: 700;
    text-decoration: none;
    border: 2px solid var(--color-accent);
    cursor: pointer;
}

.button:hover,
.button:focus {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.button--secondary {
    background-color: transparent;
    color: var(--color-text);
}

.button--secondary:hover,
.button--secondary:focus {
    background-color: var(--color-surface);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.hero__image img {
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.section__header {
    margin-bottom: 2rem;
}

.skills-grid,
.projects-grid,
.references-grid {
    display: grid;
    gap: 1rem;
}

.skill-card,
.project-card,
.reference-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}


.project-card {
    overflow: hidden;
    padding: 0;
}

.project-card img {
    width: 100%;
    aspect-ratio: 16 /9;
    object-fit: cover;
}

.project-card__content {
    padding: 1.5rem;
}

.project-card__links,
.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

.project-card__links a,
.social-links a {
    color: var(--color-accent);
    font-weight: 700;
    text-decoration: none;
}

.project-card__links a:hover,
.project-card__links a:focus,
.social-links a:hover,
.social-links a:focus {
    color: var(--color-accent-dark);
    text-decoration: underline;
}

.reference-card blockquote {
    margin: 0 0 1rem;
}

.reference-card > p {
    margin: 0;
    color: var(--color-accent);
    font-weight: 700;
}

.contact-form {
    display: grid;
    gap: 1rem;
    max-width: 40rem;
}

.form-group {
    display: grid;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 700;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-surface);
    color: var(--color-text);
    font: inherit;
}

.form-error,
.form-status {
    min-height: 1.5rem;
    margin: 0;
}

.form-error {
    color: var(--color-error);
}

.site-footer {
    padding: 2rem 1.5rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    text-align: center;
}

.site-footer p {
    margin: 0;
}

.social-links {
    justify-content: center;
    padding: 0;
    list-style: none;
}

@media (min-width: 48rem) {
    .navbar__toggle {
        display: none;
    }

    .navbar__menu {
        position: static;
        display: flex;
        align-items: center;
        gap: 1.5rem;
        padding: 0;
        background-color: transparent;
        border-bottom: 0;
    }

    .hero {
        grid-template-columns: 1.2fr 0.8fr;
    }

    .hero__actions {
        flex-direction: row;
    }

    .button {
        padding: 0.8rem 1.25rem;
    }

    .skills-grid,
    .projects-grid,
    .references-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-form .button {
        justify-self: start;
    }
}

@media (min-width: 64rem) {
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}