/* ===== 1. Variables: cambiás un valor acá y cambia en todo el sitio ===== */
:root {
    --bg: #000;
    --fg: #fff;
    --muted: #a8a8a8;
    --line: #2b2b2b;
    --surface: #161616;
    --accent: #25e060;
}

/* ===== 2. Base ===== */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: system-ui, sans-serif;
    line-height: 1.5;
}

a {
    color: inherit;
}

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

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

/* Márgenes laterales: 1rem en celular, y centrado con 1200px de ancho máximo en pantallas grandes */
header,
main,
footer {
    padding-inline: max(1rem, calc((100% - 1200px) / 2));
}

/* ===== 3. Botones ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1rem;
    border: 1px solid var(--accent);
    border-radius: 6px;
    background: var(--accent);
    color: #000;
    font-weight: 600;
    text-decoration: none;
}

.btn-ghost {
    background: transparent;
    border-color: var(--line);
    color: var(--fg);
}

/* ===== 4. Encabezado ===== */
header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-block: 1rem;
    border-bottom: 1px solid var(--line);
}

.brand {
    font-size: 1.6rem;
    font-weight: 700;
    font-style: italic;
    text-decoration: none;
}

/* ===== 5. Presentación (primera sección de main) ===== */
main section:first-child {
    padding-block: clamp(2rem, 8vw, 4.5rem) clamp(1rem, 3vw, 2rem);
}

h1 {
    max-width: 14ch;
    margin: 0 0 1rem;
    font-size: clamp(2.4rem, 9vw, 4.5rem);
    font-style: italic;
    line-height: 1;
}

main section:first-child p {
    max-width: 48ch;
    margin: 0;
    color: var(--muted);
    font-size: 1.1rem;
}

/* ===== 6. Buscador y estado ===== */
label {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--muted);
    font-size: 0.9rem;
}

input {
    width: 100%;
    max-width: 420px;
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: transparent;
    color: var(--fg);
    font: inherit;
}

#status {
    margin: 1rem 0;
    color: var(--muted);
}

/* ===== 7. Grilla y tarjetas ===== */
#grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 170px), 1fr));
    gap: 1rem;
    padding-bottom: 2rem;
}

article {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
}

article img {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    background: var(--surface);
}

article h2 {
    margin: 0.75rem 0.75rem 0.25rem;
    font-size: 1rem;
    line-height: 1.25;
}

article p {
    margin: 0 0.75rem;
}

.meta {
    color: var(--muted);
    font-size: 0.875rem;
}

article .stock {
    margin-bottom: 0.75rem;
    color: var(--accent);
    font-size: 0.8rem;
}

article .btn {
    margin: auto 0.75rem 0.75rem;
}

/* ===== 8. Pie ===== */
footer {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    padding-block: 1.5rem 2.5rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
}

footer p {
    margin: 0;
}

footer a {
    color: var(--fg);
}

/* ===== 9. Pantallas más grandes ===== */
@media (min-width: 720px) {
    #grid {
        grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
        gap: 1.25rem;
    }
}