:root {
    --primary: #0e2a47;
    --primary-hover: #143d66;
    --bg-light: #f5f5f5;
    --text-main: #333;
    --text-muted: #555;
    --white: #ffffff;
}

/* RESET */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg-light);
    color: var(--text-main);
    line-height: 1.6;
}

/* HEADER */
header {
    background: var(--primary);
    color: var(--white);
    padding: 40px 20px;
    text-align: center;
}

header img {
    width: 200px;
    margin-bottom: 15px;
}

header h1 {
    margin: 0;
    font-size: 32px;
}

header nav {
    margin-top: 15px;
}

header nav a {
    color: var(--white);
    text-decoration: none;
    margin: 0 12px;
    font-weight: 500;
}

header nav a:hover {
    text-decoration: underline;
}

/* MAIN */
main {
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 20px;
}

section {
    background: var(--white);
    padding: 25px;
    margin-bottom: 40px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,.05);
}

h2 {
    margin-top: 0;
    color: var(--primary);
}

/* LINKS */
main a {
    color: var(--primary);
    font-weight: 500;
}

main a:hover {
    text-decoration: underline;
}

/* BUTTON */
.btn {
    display: inline-block;
    padding: 10px 22px;
    margin-top: 15px;
    background: var(--primary);
    color: var(--white);
    text-decoration: none;
    border-radius: 6px;
}

.btn:hover {
    background: var(--primary-hover);
}

/* CARDS */
.servicios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
}

.card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0,0,0,.08);
    transition: .2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 18px rgba(0,0,0,.15);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-body {
    padding: 15px 18px;
}

.card-body h3 {
    margin: 0 0 10px;
    font-size: 18px;
    color: var(--primary);
}

.card-body p {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
}

/* FOOTER */
footer {
    background: var(--primary);
    color: #ddd;
    text-align: center;
    padding: 25px 15px;
    font-size: 14px;
}

footer a {
    color: var(--white);
    text-decoration: none;
    margin: 0 8px;
}

footer a:hover {
    text-decoration: underline;
}