:root {
    /* Brand colors taken from the logo */
    --orange: #fd8450;
    --orange-deep: #f2643a;
    --peach: #ffc7a6;
    --graphite: #4d4d4b;
    --ink: #1f1f1e;
    --muted: #61615e;
    --line: rgba(31, 31, 30, 0.09);
    --bg: #fbf8f6;
    --card-bg: rgba(255, 255, 255, 0.72);
    --card-border: rgba(255, 255, 255, 0.9);
    --card-shadow: 0 1px 2px rgba(31, 31, 30, 0.04), 0 30px 60px -24px rgba(242, 100, 58, 0.35);
    --tag-bg: rgba(253, 132, 80, 0.1);
    --tag-border: rgba(253, 132, 80, 0.25);
    --tag-text: #b8492a;
    --link: var(--orange-deep);
    --btn-bg: var(--ink);
    --btn-text: #fff;
    --blob-opacity: 0.55;
    color-scheme: light;
}

/* Dark theme: follows the OS setting unless the visitor picked one explicitly */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --ink: #f1efec;
        --muted: #a9a6a1;
        --line: rgba(255, 255, 255, 0.08);
        --bg: #131211;
        --card-bg: rgba(30, 28, 27, 0.62);
        --card-border: rgba(255, 255, 255, 0.08);
        --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 30px 70px -24px rgba(242, 100, 58, 0.28);
        --tag-bg: rgba(253, 132, 80, 0.12);
        --tag-border: rgba(253, 132, 80, 0.3);
        --tag-text: #ffa47a;
        --link: #ff9a6b;
        --btn-bg: #f1efec;
        --btn-text: #1f1f1e;
        --blob-opacity: 0.3;
        color-scheme: dark;
    }
}
:root[data-theme="dark"] {
    --ink: #f1efec;
    --muted: #a9a6a1;
    --line: rgba(255, 255, 255, 0.08);
    --bg: #131211;
    --card-bg: rgba(30, 28, 27, 0.62);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 30px 70px -24px rgba(242, 100, 58, 0.28);
    --tag-bg: rgba(253, 132, 80, 0.12);
    --tag-border: rgba(253, 132, 80, 0.3);
    --tag-text: #ffa47a;
    --link: #ff9a6b;
    --btn-bg: #f1efec;
    --btn-text: #1f1f1e;
    --blob-opacity: 0.3;
    color-scheme: dark;
}

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

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 16px;
    font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.6;
    transition: background-color .3s, color .3s;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* ---------- Background gradient (GitLab-like soft mesh) ---------- */
.bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.bg span {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: var(--blob-opacity);
    animation: float 22s ease-in-out infinite alternate;
}
.bg .b1 { width: 60vw; height: 60vw; top: -25vw; right: -15vw; background: var(--orange); }
.bg .b2 { width: 45vw; height: 45vw; top: 15vh; left: -18vw; background: var(--peach); animation-delay: -6s; }
.bg .b3 { width: 40vw; height: 40vw; bottom: -20vw; right: 10vw; background: var(--orange-deep); opacity: calc(var(--blob-opacity) * 0.65); animation-delay: -12s; }
.bg .b4 { width: 35vw; height: 35vw; bottom: -12vw; left: 12vw; background: #9a9a96; opacity: calc(var(--blob-opacity) * 0.33); animation-delay: -3s; }
.bg::after {
    /* Subtle grid overlay for a "technical" feel */
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse at 50% 45%, #000 10%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at 50% 45%, #000 10%, transparent 70%);
    opacity: 0.6;
}
@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(4vw, 3vh) scale(1.08); }
}

/* ---------- Business card ---------- */
.card {
    width: 100%;
    max-width: 960px;
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 48px;
    align-items: center;
    padding: 52px 52px 48px;
    border-radius: 24px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
}
.logo {
    display: block;
    width: 200px;
    height: auto;
    margin-bottom: 32px;
}
.logo-dark { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .logo-light { display: none; }
    :root:not([data-theme="light"]) .logo-dark { display: block; }
}
:root[data-theme="dark"] .logo-light { display: none; }
:root[data-theme="dark"] .logo-dark { display: block; }
.eyebrow {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--orange-deep);
    margin: 0 0 10px;
}
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
h1 {
    font-size: clamp(1.7rem, 5vw, 2.2rem);
    line-height: 1.15;
    letter-spacing: -0.03em;
    font-weight: 800;
    margin: 0 0 14px;
}
h1 .grad {
    background: linear-gradient(100deg, var(--orange-deep), var(--orange) 50%, #ffa36f);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.lead { color: var(--muted); margin: 0 0 22px; }

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.tags li {
    padding: 5px 12px;
    border-radius: 999px;
    background: var(--tag-bg);
    border: 1px solid var(--tag-border);
    color: var(--tag-text);
    font-size: 0.82rem;
    font-weight: 500;
}

.contact {
    padding-left: 48px;
    border-left: 1px solid var(--line);
}
address {
    font-style: normal;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.8;
}
address strong { color: var(--ink); font-weight: 600; }
address a {
    color: var(--link);
    font-weight: 500;
    text-decoration: none;
}
address a:hover { text-decoration: underline; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 24px;
    padding: 12px 22px;
    border-radius: 999px;
    background: var(--btn-bg);
    color: var(--btn-text);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    box-shadow: 0 6px 20px rgba(31, 31, 30, 0.18);
    transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(31, 31, 30, 0.25); }

/* ---------- Theme toggle ---------- */
.theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    border-radius: 999px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--ink);
    cursor: pointer;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .moon { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .sun { display: none; }
    :root:not([data-theme="light"]) .theme-toggle .moon { display: block; }
}
:root[data-theme="dark"] .theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .moon { display: block; }

footer {
    margin-top: 24px;
    font-size: 0.82rem;
    color: var(--muted);
}

@media (max-width: 820px) {
    .card { grid-template-columns: 1fr; gap: 32px; max-width: 560px; }
    .contact { padding-left: 0; padding-top: 28px; border-left: 0; border-top: 1px solid var(--line); }
}
@media (max-width: 520px) {
    .card { padding: 36px 24px 32px; }
    .logo { width: 170px; }
    .bg span { filter: blur(60px); }
    .bg .b1 { width: 110vw; height: 110vw; top: -50vw; }
    .bg .b2 { width: 80vw; height: 80vw; }
}
@media (prefers-reduced-motion: reduce) {
    .bg span { animation: none; }
    .btn, body { transition: none; }
}