:root {
    --bg: #171008;
    --surface: #201509;
    --surface-alt: #1a1108;
    --fg: #fdf3e2;
    --muted: #d9b98f;
    --border: #3a2814;
    --accent: #ffc107;
    --accent-2: #ff6b00;
    --accent-fg: #171008;
    --radius: 14px;
    --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;

    --space-1: 0.5rem;
    --space-2: 0.75rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --space-7: 4.5rem;
    --space-8: 6rem;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}

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

a {
    color: inherit;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 1.75rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
    min-height: 44px;
}

.button--primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: var(--accent-fg);
    box-shadow: 0 8px 24px rgba(255, 107, 0, 0.35);
}

.button--primary:hover {
    filter: brightness(1.06);
    transform: translateY(-2px);
}

.button--primary:focus-visible {
    outline: 3px solid var(--fg);
    outline-offset: 3px;
}

/* Header / nav */

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(23, 16, 8, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav {
    max-width: 72rem;
    margin: 0 auto;
    padding: var(--space-3) var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.nav__brand {
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
    text-decoration: none;
    color: var(--fg);
}

.nav__links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--space-5);
    margin: 0;
    padding: 0;
}

.nav__links a {
    text-decoration: none;
    color: var(--muted);
    font-weight: 500;
    transition: color 0.2s ease;
    padding: 0.5rem 0.1rem;
}

.nav__links a:hover,
.nav__links a:focus-visible {
    color: var(--accent);
}

.nav__cta {
    color: var(--accent) !important;
    font-weight: 700 !important;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
}

.nav__toggle span {
    display: block;
    width: 20px;
    height: 2px;
    margin: 0 auto;
    background: var(--fg);
}

/* Hero */

.hero {
    padding: var(--space-8) var(--space-4) var(--space-7);
    background:
        radial-gradient(60% 60% at 20% 15%, rgba(255, 193, 7, 0.22), transparent 60%),
        radial-gradient(50% 50% at 85% 30%, rgba(255, 107, 0, 0.28), transparent 60%),
        var(--bg);
    text-align: center;
}

.hero__inner {
    max-width: 44rem;
    margin: 0 auto;
}

.hero__eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    margin: 0 0 var(--space-3);
}

.hero__title {
    font-size: clamp(2.75rem, 8vw, 5rem);
    letter-spacing: -0.03em;
    font-weight: 800;
    margin: 0 0 var(--space-3);
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero__intro {
    color: var(--muted);
    font-size: 1.15rem;
    line-height: 1.7;
    max-width: 34rem;
    margin: 0 auto var(--space-5);
}

/* Sections */

.section {
    padding: var(--space-8) var(--space-4);
}

.section--alt {
    background: var(--surface-alt);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section__inner {
    max-width: 72rem;
    margin: 0 auto;
}

.section__inner--narrow {
    max-width: 36rem;
    text-align: center;
}

.section__title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    letter-spacing: -0.02em;
    font-weight: 800;
    margin: 0 0 var(--space-4);
    color: var(--fg);
}

.section__text {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.7;
    max-width: 60ch;
    margin: 0 0 var(--space-4);
}

#about .section__text {
    max-width: 68ch;
}

/* Projects */

.projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: var(--space-5);
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-2);
}

.card__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    color: var(--fg);
}

.card__desc {
    color: var(--muted);
    font-size: 0.98rem;
    line-height: 1.6;
    margin: 0;
    flex: 1;
}

.card__link {
    align-self: flex-start;
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s ease, color 0.2s ease;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
}

.card__link:hover,
.card__link:focus-visible {
    border-color: var(--accent-2);
    color: var(--accent-2);
}

/* Footer */

.site-footer {
    text-align: center;
    padding: var(--space-5) var(--space-4);
    color: var(--muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
}

/* Focus visibility everywhere */

a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* Responsive nav */

@media (max-width: 720px) {
    .nav__toggle {
        display: flex;
    }

    .nav__links {
        position: absolute;
        top: calc(100% + 1px);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        padding: var(--space-4);
        transform-origin: top;
        transform: scaleY(0);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.2s ease, opacity 0.2s ease;
    }

    .nav__links.is-open {
        transform: scaleY(1);
        opacity: 1;
        pointer-events: auto;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        scroll-behavior: auto !important;
    }
}