/* ===== Reset básico ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Segoe UI', sans-serif;
    background: #f4f6f9;
    color: #333;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header / Nav ===== */
header {
    background: #2c3e50;
    padding: 1rem 2rem;
}

header nav a {
    color: #ecf0f1;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
}

header nav a:hover { color: #3498db; }

/* ===== Main ===== */
main {
    flex: 1;
    max-width: 900px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

h1 { margin-bottom: 1rem; color: #2c3e50; }

/* ===== Tabla ===== */
table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,.08);
}

thead { background: #2c3e50; color: #fff; }
th, td { padding: .75rem 1rem; text-align: left; }
tbody tr:nth-child(even) { background: #f8f9fa; }
tbody tr:hover { background: #eaf4fb; }

td a {
    color: #3498db;
    text-decoration: none;
    font-weight: 600;
}

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

/* ===== Card ===== */
.card {
    background: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,.08);
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* ===== Links ===== */
a { color: #3498db; }
a:hover { color: #2980b9; }

/* ===== Footer ===== */
footer {
    text-align: center;
    padding: 1rem;
    font-size: .85rem;
    color: #aaa;
    background: #fff;
    border-top: 1px solid #eee;
}

/* ===== Min viewport height ===== */
.min-vh-25 { min-height: 25vh; }