/* style.css
 * Minimal styling for the Inventario application.
 *
 * The layout is mobile‑first.  On small screens the navigation menu
 * collapses into a vertical list.  On larger screens it displays
 * horizontally.  Typography defaults to 16px but can be adjusted by
 * changing the CSS custom property --base-font-size via JavaScript.
 */

:root {
    --base-font-size: 16px;
    --primary-color: #0066cc;
    --secondary-color: #f5f5f5;
    --accent-color: #e0e0e0;
    --text-color: #333;
    --border-radius: 8px;
    --spacing: 0.5rem;
}

html {
    font-size: var(--base-font-size);
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: var(--text-color);
    background-color: #fafafa;
}

.site-header {
    background-color: var(--primary-color);
    color: #fff;
    padding: var(--spacing);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.site-title {
    margin: 0;
    font-size: 1.5rem;
}

.nav-bar ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing);
}

.nav-bar li {
    margin: 0;
}

.nav-bar a {
    color: #fff;
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    transition: background-color 0.2s;
}

.nav-bar a:hover,
.nav-bar a:focus {
    background-color: rgba(255, 255, 255, 0.2);
}

.site-main {
    padding: var(--spacing);
}

form {
    max-width: 600px;
    margin: auto;
    background-color: #fff;
    padding: var(--spacing);
    border: 1px solid var(--accent-color);
    border-radius: var(--border-radius);
}

label {
    display: block;
    margin-top: var(--spacing);
}

input[type="text"],
input[type="number"],
input[type="password"],
select {
    width: 100%;
    padding: 0.5rem;
    margin-top: 0.25rem;
    box-sizing: border-box;
    border: 1px solid var(--accent-color);
    border-radius: var(--border-radius);
}

button,
input[type="submit"] {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    margin-top: var(--spacing);
    border-radius: var(--border-radius);
    cursor: pointer;
}

button:hover,
input[type="submit"]:hover {
    background-color: #004d99;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing);
}

table th,
table td {
    border: 1px solid var(--accent-color);
    padding: 0.5rem;
    text-align: left;
}

table th {
    background-color: var(--secondary-color);
}

.alert {
    padding: var(--spacing);
    margin-top: var(--spacing);
    border-radius: var(--border-radius);
}

.alert-success {
    background-color: #e6f4ea;
    color: #2e7d32;
}

.alert-error {
    background-color: #fdecea;
    color: #c62828;
}

@media (max-width: 600px) {
    .nav-bar ul {
        flex-direction: column;
    }
}