/* =============================
    VARIABLES Y RESET
    ============================= */
    :root {
    --azul: #1a56db;
    --azul-oscuro: #1040b0;
    --gris-fondo: #f5f6f8;
    --gris-borde: #d8dce4;
    --gris-texto: #444;
    --negro: #1a1a2e;
    --blanco: #ffffff;
    --verde: #0e7c3a;
    --amarillo-fondo: #fffbe6;
    --amarillo-borde: #f0c040;
    --azul-fondo: #eef3fc;
    }

    * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    }

    body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 15px;
    color: var(--gris-texto);
    background: var(--gris-fondo);
    min-height: 100vh;
    }

    /* =============================
    HEADER
    ============================= */
    header {
    background: var(--negro);
    color: var(--blanco);
    padding: 32px 40px;
    margin-left: 220px;
    }

    .header-inner {
    max-width: 1100px;
    margin: 0 auto;
    }

    .header-badge {
    display: inline-block;
    background: var(--azul);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: 3px;
    margin-bottom: 10px;
    }

    header h1 {
    font-size: 30px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 6px;
    }

    .header-sub {
    font-size: 14px;
    color: #aab0c0;
    }

    /* =============================
    LAYOUT PRINCIPAL
    ============================= */
    .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 220px;
    height: 100vh;
    background: var(--blanco);
    border-right: 1px solid var(--gris-borde);
    padding: 0;
    overflow-y: auto;
    }

    .sidebar-titulo {
    display: block;
    background: var(--negro);
    color: var(--blanco);
    font-size: 13px;
    font-weight: 700;
    padding: 18px 20px;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--azul);
    }

    .sidebar ul {
    list-style: none;
    }

    .sidebar ul li {
    border-bottom: 1px solid var(--gris-fondo);
    }

    .sidebar ul li a {
    display: block;
    padding: 10px 20px;
    font-size: 13px;
    color: var(--gris-texto);
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
    }

    .sidebar ul li a:hover {
    background: var(--azul-fondo);
    color: var(--azul);
    }

    .sidebar ul ul {
    background: var(--gris-fondo);
    }

    .sidebar ul ul li a {
    padding-left: 32px;
    font-size: 12px;
    color: #666;
    }

    .contenido {
    margin-left: 220px;
    padding: 40px;
    max-width: 1200px;
    flex: 1;
    }

    /* =============================
    SECCIONES
    ============================= */
    section {
    background: var(--blanco);
    border: 1px solid var(--gris-borde);
    border-radius: 6px;
    padding: 32px;
    margin-bottom: 32px;
    }

    .section-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--gris-fondo);
    padding-bottom: 16px;
    }

    .num {
    font-size: 28px;
    font-weight: 800;
    color: var(--azul);
    line-height: 1;
    min-width: 44px;
    }

    .section-header h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--negro);
    }

    .intro-texto {
    margin-bottom: 24px;
    line-height: 1.7;
    color: #555;
    }

    /* =============================
    SUBSECCIONES
    ============================= */
    .subseccion {
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--gris-borde);
    }

    .subseccion h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--negro);
    margin-bottom: 18px;
    }

    /* =============================
    PASOS
    ============================= */
    .paso {
    margin-bottom: 28px;
    padding: 20px;
    background: var(--gris-fondo);
    border-left: 3px solid var(--azul);
    border-radius: 4px;
    }

    .paso-header {
    margin-bottom: 16px;
    }

    .paso-num {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--azul);
    background: var(--azul-fondo);
    padding: 2px 8px;
    border-radius: 3px;
    margin-bottom: 8px;
    }

    .paso p {
    line-height: 1.7;
    font-size: 14px;
    }

    code {
    background: #e8edf5;
    color: var(--azul-oscuro);
    font-size: 13px;
    padding: 1px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    }

    /* =============================
    CAPTURAS — FLEX
    ============================= */
    .capturas {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    }

    .cap {
    display: flex;
    flex-direction: column;
    flex: 1 1 280px;
    min-width: 200px;
    max-width: 100%;
    }

    .cap img {
    width: 100%;
    border: 1px solid var(--gris-borde);
    border-radius: 4px;
    display: block;
    }

    .cap-label {
    font-size: 12px;
    color: #888;
    margin-top: 6px;
    text-align: center;
    font-style: italic;
    }

    /* =============================
    AVISOS E INFO
    ============================= */
    .aviso {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: var(--amarillo-fondo);
    border: 1px solid var(--amarillo-borde);
    border-radius: 4px;
    padding: 14px 16px;
    }

    .aviso-ico {
    font-size: 18px;
    line-height: 1.4;
    }

    .aviso p {
    font-size: 14px;
    color: #5a4800;
    line-height: 1.6;
    }

    .info-box {
    background: var(--azul-fondo);
    border: 1px solid #c2d4f5;
    border-radius: 4px;
    padding: 14px 16px;
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.7;
    color: #1a3a7a;
    }

    /* =============================
    FOOTER
    ============================= */
    footer {
    background: var(--negro);
    color: #7a8090;
    font-size: 12px;
    text-align: center;
    padding: 16px;
    margin-left: 220px;
    }

    /* =============================
    RESPONSIVE — TABLET (768px)
    ============================= */
    @media (max-width: 900px) {
    header {
        margin-left: 0;
    }

    .sidebar {
        position: static;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--gris-borde);
    }

    .sidebar-titulo {
        display: none;
    }

    .sidebar ul {
        display: flex;
        flex-wrap: wrap;
    }

    .sidebar ul li {
        border-bottom: none;
    }

    .sidebar ul li a {
        padding: 8px 14px;
        font-size: 13px;
    }

    .sidebar ul ul {
        display: none;
    }

    .contenido {
        margin-left: 0;
        padding: 20px;
        max-width: 100%;
    }

    footer {
        margin-left: 0;
    }

    .cap {
        flex: 1 1 220px;
    }
    }

    /* =============================
    RESPONSIVE — IPHONE (390px)
    ============================= */
    @media (max-width: 480px) {
    header {
        padding: 20px 16px;
        margin-left: 0;
    }

    header h1 {
        font-size: 22px;
    }

    .header-sub {
        font-size: 13px;
    }

    .sidebar ul {
        flex-direction: column;
    }

    .sidebar ul li a {
        font-size: 14px;
        padding: 10px 16px;
    }

    .contenido {
        padding: 14px;
        max-width: 100%;
    }

    section {
        padding: 18px 14px;
    }

    .section-header h2 {
        font-size: 17px;
    }

    .num {
        font-size: 22px;
    }

    .paso {
        padding: 14px;
    }

    .cap {
        flex: 1 1 100%;
    }

    .capturas {
        flex-direction: column;
    }
    }